Preface

dopamine dependency
Posted originally on the Archive of Our Own at http://archiveofourown.org/works/68567336.

Rating:
Explicit
Archive Warning:
Creator Chose Not To Use Archive Warnings
Category:
M/M
Fandoms:
EXILE (Japan Band), Fantastics from Exile Tribe (Band)
Relationship:
Sato Taiki/Yamamoto Sekai
Characters:
Yamamoto Sekai, Sato Taiki
Additional Tags:
Canon Compliant, Fluff, Kisses, a lot of kisses, im really not joking there are A LOT OF KISSES, Anal Sex, Blow Jobs, Bickering, taiki being a nagging wife, Miscommunication, Old Married Couple, Author Is Sleep Deprived, The Author Regrets Nothing, The Author Regrets Everything, Bathroom Sex
Language:
English
Stats:
Published: 2025-08-02 Completed: 2025-08-04 Words: 14,502 Chapters: 5/5

dopamine dependency

Summary

He finally snapped, “You’re acting like you’re my wife.”

The silence that followed was deafening.

Taiki huffed, crossing his arms. “As long as you eat healthy, I don’t care how you perceive me.”

Sekai blinked and turned to look at him. “So you don’t care if I assume you’re my wife?”

Taiki didn’t answer. He grabbed another makeup wipe and began rubbing at the side of his face, aggressively swiping at his temple like he was trying to erase the conversation. “No, I don’t care,” he said eventually, flat, dismissive.

That pissed Sekai off even more—but in the weirdest, most twisted way. Because Taiki was just standing there, in nothing but a tank top and boxer briefs, with his cheeks already slightly red from exertion or embarrassment... or maybe both.

Notes

very OOC. and probably nonsense. i don't know. i don't care. i wrote this for myself~

Chapter 1

The performance ended in a whirlwind of flashing lights, echoing cheers, and residual adrenaline still pulsing through Sekai’s limbs like electricity. His chest heaved as he made his way backstage with Taiki just a few steps behind. The sweat clung to his skin beneath his EXILE stage costume, the high-collared black and gold jacket sticking slightly to his back, the thick fabric weighing heavier than it should.

Their dressing room was further down the hallway. Today, it was just the two of them. Sekai had been grateful for that at first. Quiet time after shows was rare and valuable, and if he had to share that with someone, he preferred it to be Taiki. Always had. Ever since those early days when Taiki was just a kid in his dance class, clumsy and eager, with those wide eyes full of admiration that used to fluster Sekai more than he cared to admit.

Now, Taiki was thirty, grown into his features, still annoyingly good at being both charming and nagging—and somehow still made Sekai feel like he was being stared at by the same young boy who used to cling onto his every word. They had come far.

The moment they entered the dressing room, the bustle of staff like makeup artists, assistants, all seemed to evaporate like steam off their backs. Maybe they left to tend to the other members. Maybe they figured Sekai and Taiki could handle themselves.

Sekai pulled the collar of his jacket as he walked over to the full-body mirror. The reflection staring back at him looked tired. Not bad, just… weary. His hair was still slicked back from the styling gel, bits of sweat clinging to his temples.

Taiki was already halfway peeling off his shirt. Sekai’s eyes flicked up and caught the way Taiki’s gaze drifted subtly toward him, then settled on his stomach with a small frown that was just barely hiding behind polite concern.

“Sekai-san,” Taiki’s voice broke through the silence. Sekai was already half-tugging off his tank-top, his arms stretched above his head.

“Hmm?”

Taiki stared at him through the mirror, eyes narrowing. “You’re getting fat.”

Sekai paused, tank-top halfway over his head. “Excuse me?”

“That,” Taiki gestured toward his exposed stomach, “is a bulge. Not abs. Not muscle. You've been drinking cola almost everyday, right?”

Sekai finally pulled the tank-top off and dropped it to the floor. “Wow,” he muttered dryly. “Thanks for the compliment.”

“I’m serious,” Taiki said, grabbing a few makeup wipes from the table. “You can’t just keep drinking cola every day. We’re in EXILE and FANTASTICS. We have standards. You know how hard everyone’s working to maintain their body.”

Sekai grunted and turned toward his own reflection, inspecting his stomach with mild irritation. Okay, maybe there was a bit more softness there than usual. But it wasn’t like he was letting himself go. He still danced like hell, trained just as hard as everyone else.

“It’s my stress relief, alright? I need that dopamine rush.”

“There are other ways to get dopamine that don’t rot your organs from the inside.”

Sekai turned to face him fully now. “Like what, meditation?”

“Yes!” Taiki pointed at him. “Or sports. Or going for a run. Or—”

“I already dance for hours every day,” Sekai shot back. “I don’t want to run after that. Are you crazy?”

“Then healthy food, at least. Or vitamin drinks. Or a smoothie in the morning—”

“Stop,” Sekai groaned, pressing a palm to his forehead. “You’re worse than my mom.”

Taiki walked closer, a smear of makeup still on his cheek. He looked serious. “I’m doing this for you. For your health. I don’t want you to get sick from this habit.”

“That’s what they all say before they take away the things that make you happy.”

“Oh my god.” Taiki sighed heavily. “You’re so dramatic.”

Sekai let out an annoyed sound and turned back toward the mirror, wiping off the remnants of eyeliner from his lower lid. Taiki continued muttering things about sugar intake and insulin resistance, something about metabolism and long-term energy regulation.

Sekai felt his fuse run short. He finally snapped, “You’re acting like you’re my wife.”

The silence that followed was deafening.

Taiki huffed, crossing his arms. “As long as you eat healthy, I don’t care how you perceive me.”

Sekai blinked and turned to look at him. “So you don’t care if I assume you’re my wife?”

Taiki didn’t answer. He grabbed another makeup wipe and began rubbing at the side of his face, aggressively swiping at his temple like he was trying to erase the conversation.

“No, I don’t care,” he said eventually, flat, dismissive.

That pissed Sekai off even more—but in the weirdest, most twisted way. Because Taiki was just standing there, in nothing but a tank top and boxer briefs, with his cheeks already slightly red from exertion or embarrassment, or maybe both. He looked flustered, even though he tried to act indifferent. He always did. And maybe Sekai had been trying to distract from the cola topic, but something else clawed up from inside him in that moment.

He stepped forward and grabbed Taiki’s wrist gently, pulling him closer.

Taiki barely had time to turn his head before Sekai leaned in and kissed him.

Just a soft press—no tongue, no heat. Just a firm, lingering touch of lips to lips, enough to make a point.

He pulled back slowly, watching Taiki’s eyes widen in absolute disbelief. The younger man’s lips parted in a gasp, a breath he forgot to take.

“You’re my wife,” Sekai said, his voice low, almost lazy. “I get to kiss and do whatever I want to my wife.”

Taiki’s mouth opened, then closed. Then opened again. “Th-that’s not—” His voice broke into a stutter, and the blush that started on his cheeks spread like fire, up to his ears, down to his neck. He looked like a broken toy trying to reboot.

Sekai chuckled. “Kissing gives dopamine too, you know. Natural. Healthy. No sugar involved.”

“I—You—That’s—” Taiki’s hands flailed as he tried to find words, but they refused to come. He turned abruptly, turning his back to Sekai as he tried to gather himself, hands fumbling for his clothes, clearly intending to escape the moment.

But Sekai couldn’t stop looking at him. Couldn’t stop watching the way Taiki’s spine curved, his shoulder blades moving beneath the thin fabric of his tank top, the way his breath hitched even now. He had only meant to tease, to derail the nagging. He hadn’t expected that expression. That reaction. Taiki hadn’t pushed him away.

He wanted to kiss him again.

Sekai stepped forward, closing the distance once more. His chest was bare, pants hanging low on his hips, skin still warm from the stage lights. Taiki was reaching for his fresh shirt, but Sekai caught him by the waist.

“Wait.”

Taiki turned, surprised as Sekai pressed their mouths together again.

This time it was slower. More deliberate. Sekai tilted his head and deepened the kiss, one hand sliding to the small of Taiki’s back, the other cupping his cheek. Taiki’s hands tensed, fists clenched for a moment, then relaxed.

His lips trembled beneath Sekai’s but didn’t pull away. In fact, he leaned in, just a little. Shyly. Uncertain.

Sekai groaned softly into the kiss, the contact sparking heat that pooled low in his stomach. This wasn’t just teasing anymore. He could feel it in Taiki’s breath, in the way his body shivered just slightly when Sekai’s fingers brushed over the hem of his boxer briefs. Sekai moved his hand from Taiki’s cheek down to his jaw, then along his collarbone, exploring slowly, testing the waters.

Taiki whimpered when Sekai’s palm brushed over his ribs.

And then, in the most awkward, bashful movement possible, Taiki reached up and placed both palms on Sekai’s bare chest.

His touch was hesitant at first, but real. His fingertips grazed over the dips between Sekai’s pectorals, brushing over the firm muscle earned through years of dancing. He looked like he didn’t know what to do with his hands—but he wasn’t pulling away.

Sekai breathed out, lips brushing Taiki’s ear now. “You’re really not going to run, huh?”

Taiki’s only response was a muffled, flustered, “S-Sekai-san…”

His voice was so soft. So impossibly gentle and weak, like his entire body was overwhelmed.

Sekai’s arms wrapped tighter around him, anchoring them chest-to-chest, skin against fabric. He felt Taiki’s racing heart beneath his palm. And in that moment, everything faded into white noise.

It was just the two of them now.

And Sekai couldn’t stop.

«────── « ⋅ʚ♡ɞ⋅ » ──────»

Ever since that day in the dressing room, something changed between them.

It wasn’t drastic. It wasn’t declared. It wasn’t spoken out loud in words like “relationship” or “something more.” But it was there. It became their unspoken language.

When Sekai felt overwhelmed, when his chest felt too tight from pressure or his nerves felt fried after a packed schedule, when he craved for fizzy cola, he didn’t reach for the vending machine. Instead, his eyes found Taiki.

And Taiki, without asking, without needing a word, understood. He would glance back with the faintest tilt of his head, the smallest shift of his weight, and the message was clear.

Come here. I’ve got you.

Sometimes it happened in quiet stairwells of unfamiliar buildings. Sometimes in the shadows of studio backdoors where no cameras reached. Sometimes in the car when the manager left them alone.

Sekai would pull him close, grab him by the jaw or the waist, and kiss him like he needed to breathe through Taiki’s lips. Taiki, at first shy and trembling, eventually grew bolder. He kissed back now. He kissed back with the same need, the same knowing heat in his chest.

It became a secret routine. One that neither of them ever talked about directly—but it became the one thing Sekai needed more than cola.

It was during the filming of another FANTASTICS variety episode when the craving hit again.

The studio was filled with chaos, as usual. Colored spotlights sweeping over fake game sets, cheap cardboard props falling apart mid-shoot, Leiya trying to balance a spoon on his nose while Sawanatsu shouted directions from behind the camera. Sota and Yusei were laughing on the floor after losing a challenge, their limbs tangled in costume accessories. Keito was mock-sulking in the corner, drenched from a bucket of water as part of a punishment game. Horinatsu was simply trying to be sane.

Sekai stood in the middle of it all, mic clipped to his shirt, smile dutifully plastered on. He cracked jokes. He threw in snarky comments like usual. He did the MC work like a pro. But something in his mood was off. He could feel it gnawing at the back of his mind. His body felt heavy. His nerves prickled. He hadn’t had cola in five days, and this long shoot with nonstop fake laughter and stage smiles was draining every ounce of patience he had left.

He caught Taiki watching him.

Taiki always noticed. No matter how well Sekai thought he was hiding it.

During the filming break, Taiki came up to him casually, wiping sweat off his temple. “Sekai-san,” he said softly, so no one else could hear. “Are you okay?”

Sekai glanced around. The others were too busy messing around or being touched up by makeup staff to notice. He leaned in and murmured, “I need to talk.”

Taiki’s eyes flickered with recognition. “Where?”

“Follow me.”

He grabbed Taiki’s wrist and led him down the side hallway, passing by prop storage and equipment cases until he found a small studio—one of the unused recording rooms with padded walls and no windows. The door clicked shut behind them with a heavy sound.

No one would suspect anything. Leaders had private talks all the time. It was normal.

Sekai didn’t waste a second.

He pushed Taiki gently against the wall, caged him in with his arms, and kissed him.

Hard.

Taiki gasped into his mouth, but didn’t fight it. He grabbed the front of Sekai’s shirt and held tight, pulling him closer. Their mouths moved in sync now, like they’d done this enough times to know each other's rhythm. Sekai's lips parted, tongue sweeping in and teasing the inside of Taiki’s mouth, and Taiki moaned softly against him.

Sekai slid his hands along Taiki’s waist, fingers slipping just beneath the hem of his clothes, skin hot and smooth underneath. The kiss turned messier and hungrier. Their breaths clashed, noses bumping, mouths wet and open. Taiki’s fingers curled against Sekai’s chest, trying to hold onto something steady as their bodies pressed closer.

By the time they broke apart, they were both panting.

Sekai pressed his forehead against Taiki’s, still holding him by the hips.

“This…” he exhaled, “might actually be better than cola.”

Taiki let out a flustered giggle, his cheeks pink, lips swollen. “Is that supposed to be flirting, Sekai-san?”

Sekai didn’t answer. He kissed him again instead—deeper this time. Slower. He tilted Taiki’s chin up and licked into his mouth like he was tasting something forbidden. Taiki whimpered into him, hands fisting at Sekai’s back.

Their bodies rocked together in a silent, feverish rhythm. Sekai’s thigh slid between Taiki’s legs, grinding just a little. Just enough. He could feel Taiki shiver.

The secret kisses just didn’t stop.

And Sekai… Sekai didn’t realize how much he needed it. How much it helped. How the craving for cola got quieter and quieter.

«────── « ⋅ʚ♡ɞ⋅ » ──────»

Weeks turned into months.

He still drank it occasionally, when they went out to eat or during a rare cheat day. But it wasn’t the same anymore. The urge wasn’t sharp. The reward didn’t feel as satisfying.

One afternoon, weeks after the shift had truly begun, Sekai stood in the shared dance studio in front of the mirror. The room was empty, quiet except for the distant thud of bass from another room. He had peeled off his shirt, sweating from rehearsal. He wiped his face with a towel, then paused.

He looked at himself.

His reflection stared back: leaner, tighter around the stomach, the little bulge from before was gone. His waist was cleaner, more cut. His jawline sharper again. Even his eyes looked less tired.

His fingers brushed over his stomach lightly. He wasn’t ripped—not like gym bros. But the softness was gone. He looked… good.

He allowed himself a small smile. Maybe Taiki was right.

“You see it now, huh?”

Sekai turned his head.

Taiki stood by the door, holding his water bottle, grinning like he had just caught Sekai red-handed.

Sekai snorted. “How long were you standing there?”

“Long enough to see you admire your new waistline.”

Sekai huffed and grabbed the towel again, throwing it over his shoulder. “It’s not a big deal.”

Taiki stepped closer, his voice playful. “It is. It’s a good thing, right? I told you. You’ll thank me when you’re forty and still dancing without your knees giving up. We’re professionals, Sekai-san. If our bodies collapse, so do our careers. Being in shape isn’t vanity, it’s survival.”

Sekai rolled his eyes, but a part of him knew Taiki was right. Still, he didn’t want to give Taiki the satisfaction of winning the argument.

He walked forward wordlessly, grabbed the front of Taiki’s shirt, and kissed him.

Taiki squeaked into the kiss but immediately laughed into it, shaking with amusement as Sekai backed him into the mirrored wall and kissed him like he was making a point. Taiki’s hands scrambled up his back, laughter still caught in his throat even as the kiss deepened.

“I knew it,” he giggled against Sekai’s mouth. “You hate admitting I’m right.”

Sekai bit Taiki's lower lip gently. “Shut up.”

They kissed again. And again. Their reflections in the mirror tangled together like a secret they couldn’t contain anymore.

Later, during EXILE rehearsal, Sekai walked into the main hall wearing his usual black tank-top and training pants. The others were already warming up. Takahiro gave him a once-over and raised a brow.

“Sekai,” he said, tone surprised. “You look good. Leaner. Did you start something new?”

Akira turned from the water dispenser. “Wait, really?” He eyed Sekai with exaggerated suspicion. “Don’t tell me you’ve finally started using the company gym?”

Everyone snorted.

Sekai scratched the back of his head. “No. Still not a gym guy.”

Takahiro tilted his head. “Then what?”

Sekai glanced subtly across the room.

Taiki was tying his shoelaces, head ducked, pretending like he wasn’t listening. But Sekai could see the tiniest smile forming on his lips.

Sekai looked back at the others. “Just… cut out some junk. Replaced it with something way better.”

“Ooooh,” Takahiro grinned. “That’s vague, but I won't ask for more details.”

“Wise decision, Sekai,” Akira praised, nodding sagely.

The older members laughed and moved on. Taiki still didn’t say anything, but when Sekai walked past him, he saw it clearly.

That smile. Quiet. Satisfied.

Proud.

Sekai didn’t say it. Wouldn’t say it. But he felt it. He didn’t really need cola that much.

Not when every kiss from Taiki tasted sweeter.

Chapter 2

Once you’re addicted, you can’t help but ask for more.

At first, Sekai had told himself it was just for stress relief. Just dopamine. Just to replace a habit with a healthier one. Just teasing. Just fun.

But the more it happened, the more he kissed Taiki and felt Taiki kiss back with hot lips and burning cheeks, the more Sekai knew he was lying to himself.

Kisses turned longer. Softer ones became heated. Gentle pecks morphed into slow, wet kisses with tongues tangling and teeth grazing. Every time Taiki whimpered or made the tiniest sound in his throat, Sekai would lose a little more of his self-control.

He was addicted now.

And like any craving, it built over time—until one day, it spilled over.

The rehearsal that afternoon had been brutal. One of the hardest yet.

The concert was approaching fast, and they were rehearsing over and over again under hot stage lights. The choreo was intense, the formations tight. Sekai’s legs burned, sweat soaked through his shirt, and everyone was collapsing to the floor during breaks.

Taiki looked equally wrecked, sitting on the edge of the stage with a towel over his head, breathing hard, his shirt clinging to his frame. His hair was damp, cheeks flushed, collarbone glistening. Sekai watched him from across the floor, his heart hammering—not from the dance, but from something else.

His body buzzed with exhaustion and tension. His mind screamed for release. Not sugar. Not caffeine.

Taiki.

Sekai stood up, grabbed a towel, and walked straight over to him.

“Taiki,” he said lowly, voice rough from exertion.

Taiki looked up, surprised, panting slightly. “Yes?”

“I need you for a second.”

Sekai didn’t wait for permission. He just pulled him up by the wrist and led him out of the rehearsal hall, past a few corridors, into the currently vacant dressing room.

He dropped onto the small sofa, legs spread wide, chest still heaving. He leaned back, looked at Taiki, and simply held out a hand.

Taiki stepped forward cautiously, and Sekai reached out, grabbed his hips, and pulled him down right onto his lap.

Taiki let out a surprised squeak as he straddled Sekai’s thighs, their faces close, their breath mingling. Sekai’s hands moved around his waist automatically, sliding under the hem of his shirt to feel the hot, damp skin underneath.

Without a word, Sekai leaned forward and kissed him.

It was instantly heated—no teasing this time. Just a hard, hungry kiss, mouths opening immediately, their tongues meeting in a messy tangle. Sekai deepened the kiss, and Taiki groaned softly, his fingers instinctively curling around Sekai’s neck.

Sekai broke the kiss only to trail his lips down, to the sharp line of Taiki’s jaw, then down to his neck, licking along the sweat-slick skin. Taiki gasped, his hips shifting in Sekai’s lap. Sekai’s mouth sucked gently under Taiki’s ear, then pressed hot, open-mouthed kisses down the length of his throat.

Sekai’s hand gripped his waist tighter, the other one sneaking up Taiki’s back beneath his shirt, fingertips grazing along his spine.

Then, slowly, Sekai’s hand slid up Taiki’s ribs and brushed lightly over his nipple.

Taiki choked on a moan—high-pitched and broken, and froze. He pulled back, stunned at the sound that escaped his lips, eyes wide, face flaming.

“I—I didn’t mean to—” he stammered, flustered beyond belief.

But Sekai didn’t stop.

He leaned forward again, mouth still pressed to Taiki’s neck, and murmured against his skin, “We’re alone, Taiki. Let me hear your voice.”

Taiki shivered. His fingers dug slightly into Sekai’s shoulders, as if trying to hold himself together.

Sekai moved his hands lower, over the curve of Taiki’s hips, then down to his ass. He squeezed gently at first, then with firmer pressure, kneading both cheeks in slow, circular motions.

Taiki arched forward with a whimper, trying to muffle the noise against Sekai’s shoulder. But Sekai kept attacking until Taiki finally moaned, broken and breathy:

“Ah—!”

It was the sweetest sound Sekai had ever heard.

His hands moved, massaging Taiki's ass slowly as their mouths clashed again. Taiki trembled in his lap, hips grinding ever so slightly without realizing it, breath caught in his throat, fingers tangled in Sekai’s damp hair.

Sekai groaned softly into the kiss, his mind swimming with lust and euphoria and a possessiveness he didn’t want to acknowledge. Taiki was flushed, pliant and beautiful in his lap. All of Taiki was his.

Until the door suddenly burst open and Leiya stood in the doorway.

Frozen.

Mouth wide open. Face pale. His entire body stiff like a statue.

Sekai and Taiki both snapped their heads toward him, lips still shiny. Taiki’s thighs still spread on Sekai’s lap, hands clearly inside each other’s clothes.

There was a full three seconds of dead silence.

Then Leiya screamed.

“Oh my GOD—”

Sekai barely had time to blink before Leiya turned on his heel and bolted down the hall screaming, “I DIDN’T SEE ANYTHING I SWEAR—I’M BLIND—”

Taiki scrambled off Sekai’s lap so fast he practically fell, hands flailing to pull down his shirt, face redder than a cherry tomato. Sekai stood up in a daze, still breathless, awkwardly adjusting his pants while running a hand through his hair.

“Oh my god,” Taiki gasped, still fixing himself. “Oh my god. Oh my god. Leiya saw—Leiya saw everything—”

“Yeah,” Sekai muttered, rubbing the back of his neck. “He definitely did.”

Taiki covered his face with both hands. “We need to talk to him. Right now. Before he tells everyone. We need to explain. Clarify. Before this becomes a disaster.”

“I mean… we weren’t doing anything illegal,” Sekai offered weakly.

“Sekai-san!!” Taiki wailed, practically vibrating.

But before they could even take a step toward the door, it burst open again—this time with all of FANTASTICS charging into the room in loud, chaotic energy.

Yusei entered first, gasping with a hand over his mouth like he just witnessed a scandal.

Keito and Sota followed behind him, shrieking like fangirls, their hands flailing in the air as they repeated over and over: “On his lap?! On his lap?!!” like they couldn’t comprehend it.

Sawanatsu calmly walked in while munching an energy bar, chewing with raised eyebrows as if watching a Netflix drama unfold.

Horinatsu already had his phone out. “This is vlog content,” he muttered. “Legendary moment. I’ll censor the nipples.”

Taiki shrieked, “THERE WERE NO NIPPLES!!”

Leiya stood in the center like a storyteller at a campfire. “So I walked in, right? And there was Taiki-kun, on top of Sekai-san, making out like it was their honeymoon!”

Leiya shrieked dramatically before continued. “And Sekai-san had his hands here—” he gestured wildly toward his own ass— “and Taiki-kun was moaning! I’m so traumatized!”

Yusei clutched his chest emotionally. “It’s like walking in on your parents doing something.”

Keito gasped. “Wait, wait, do you think this has been going on for months?”

Sota was already shaking Taiki’s shoulders. “How long?! HOW LONG, TAIKI-KUN?!”

Taiki was redder than ever before, waving his arms wildly. “It’s not like what you guys think!! It’s not—!! I-It’s not like that!! It was just—um—like—maybe—uh—”

Sekai stood awkwardly, still blushing, scratching the back of his head. He didn’t say anything. Didn’t confirm or deny. He caught Taiki looking at him in disbelief.

“You’re not going to say anything?!”

Sekai shrugged slowly. “They already saw everything.”

Because… what could he say?

They’d been caught.

All of it—the secret kisses, the stolen moments, the touches, the sound of Taiki gasping in his arms, it wasn’t just between them anymore.

The secret was out.

Sekai didn’t even bother defending himself. He simply exhaled, his skin still prickling from earlier contact, his shirt still sticking slightly to his back from sweat and residual body heat that hadn't fully cooled off. His gaze wandered to Taiki for a second.

Yusei was the first to speak after a moment of silence. “So... wait. You two are a thing now?”

“No,” Sekai replied firmly, trying to keep his voice level, “We’re not dating.”

There was a stunned pause. All eyes turned toward him. Taiki looked up quickly, startled by the bluntness.

Sekai ran a hand through his hair and sighed, sitting back on the sofa like this was a routine press conference and not the most awkward conversation of his life. “We’re not together. It’s just... sometimes we kiss.”

Sota made a strangled noise. “What do you mean just kiss?! Who just kisses?”

“Look,” Sekai said, and this time his tone was more grounded, more honest. “It’s not that deep. Sometimes it gets overwhelming. Rehearsals, shoots, concerts, being responsible for the group, trying to hold everything together. Kissing helps me relax. Dopamine refill. Stress relief.”

Stress relief,” Sawanatsu echoed flatly.

“Uh-huh,” Sekai nodded. “Like… how people drink tea or meditate. Or… punch walls.”

“Most people don’t use their groupmates’ mouth as a stress ball,” Yusei muttered, fanning himself. “Just saying.”

Keito laughed awkwardly. “So wait. Just to clarify. You two kiss. Randomly. Regularly. But it’s not dating?”

Sekai pressed his lips together, feeling heat bloom in his cheeks again. He wasn’t proud of this explanation—but at this point, damage control was the best option. “Yeah. That’s right.”

“…Why Taiki-kun?” Horinatsu asked suddenly, lowering his phone. “Why not, like, someone else?”

Sekai’s eyes flicked to Taiki, who was still blushing furiously but hadn’t interrupted him once. The silence in the room suddenly felt sharper.

He exhaled and allowed a wry grin to tug at the corner of his mouth. “Because he’s the one who banned me from drinking cola.”

A beat.

Everyone blinked.

“As you guys know I was addicted to cola,” Sekai said simply, spreading his hands. “Needed dopamine. He took away my only fix. So now he has to take responsibility.”

Sota choked. “That’s the most Sekai-san logic I’ve ever heard in my life.”

Sawanatsu, still munching on his energy bar, just grinned. “Makes sense to me.”

Then Leiya, of all people, murmured. “So… you two just making out casually? That’s kinda… weird for groupmates.”

The room tensed for a heartbeat as murmurs rippled.

Yusei quickly jumped in, “Come on, Leiya-kun, don’t be rude. Sekai-san and Taiki-kun are special. More than just groupmates. They’re like our parents. It’s different.”

Sota adding dramatically, “They’re soul-bound leaders, of course they’re different.”

Sekai smiled on the outside, but something in him cooled at those words.

Weird for groupmates.

The words repeated in his skull, echoing louder than he wanted them to.

He laughed it off like always. That same light, deflecting laugh he used when things got too real on stage or too intimate in interviews. “Maybe it is weird. But it’s not hurting anyone.”

The topic shifted after that. The boys joked and bantered, asking ridiculous questions about how many times they’d kissed, whether there were designated kiss days, whether Taiki got paid for his ‘dopamine services’—

But inside, Sekai’s mood had changed.

The moment they left the dressing room that day, Sekai made a quiet decision.

«────── « ⋅ʚ♡ɞ⋅ » ──────»

Sekai stopped kissing Taiki.

He stopped pulling Taiki behind closed doors, stopped giving him subtle glances or touches meant to signal he needed a break, needed a kiss, needed him. He acted as if nothing had ever happened. He became a textbook version of the stoic co-leader—firm, professional, focused.

But it burned.

Every time he caught Taiki stretching beside him after dance practice, arms raised, shirt riding up to reveal that delicate curve of his waist, Sekai looked away.

Every time Taiki smiled at him with that innocent, soft expression that always undid him, he shut it out.

It was like trying to stop breathing.

The absence of Taiki’s lips on his own felt like sugar withdrawal. Like the cold sting of a missing drug. Every day, Sekai felt the ache more.

He had become aware of their dynamic and power imbalance.

Of the fact that it was always him who initiated it.

Taiki had never once asked for it. Taiki probably never even wanted it, not really. Maybe he just said yes because Sekai was older. Because Sekai was his teacher. Because Sekai was his leader.

Maybe Taiki just went along with it because he had no choice. Maybe he didn’t even know how to say no.

The guilt twisted deep in his chest.

And so, like an addict without access to his fix, Sekai turned back to cola.

Bottles hidden in gym bags, cans stashed behind studio speakers. He drank quietly, feverishly, late at night, when no one was around. It didn’t taste as sweet as it used to. It didn’t give the same rush. It felt like swallowing regret with carbonation.

Days blurred into weeks. They rehearsed, performed, did various group activities. Sekai maintained the distance well, trying to go back where they used to be.

Then came the photoshoot.

The set was bright and sterile, filled with props and flashing lights. The stylist adjusted their jackets while the photographer barked instructions. Sekai stood off to the side, trying not to glance at the person standing just a few meters away.

Taiki.

He looked good. Stupidly good. His hair was slightly wavy, face glowing under the soft reflectors, a fitted outfit hugging his frame just enough to make Sekai’s stomach twist with memories. Sekai forced himself to focus elsewhere—on Keito’s dramatic posing, on Yusei adjusting his collar, on literally anything else.

Then he felt it.

Fingers, gentle, grazing through his hair.

Taiki.

Sekai froze.

Taiki was right in front of him, hand slowly combing through a lock that had probably gone astray. It was such a small touch—casual, even. But Sekai’s body reacted violently, like he’d been shocked.

He stepped away fast.

“Don’t,” he said under his breath.

Taiki’s eyes widened. “I was just—”

“I have to check something with the lighting,” Sekai said quickly, already moving toward the opposite side of the room.

He could feel Taiki’s gaze boring into his back. Confused. Hurt. And he hated himself for it.

But if he didn’t put space between them now, he was going to crack. He was going to forget every reason why they shouldn’t kiss. Why this wasn’t fair. Why it was better to stay away.

He felt like he was starving in front of a feast he couldn’t touch.

Taiki didn’t say anything the rest of the shoot. His expression was calm, professional, as always. But his movements were a little slower. His smiles a little more forced. His eyes, when they flicked to Sekai, were full of quiet sadness and a thousand unsaid things.

And Sekai didn’t know how much longer he could take it.

He wanted to beg. He wanted to apologize. He wanted to grab Taiki by the wrist and whisper please, let me have this, even if just once more.

But he didn’t.

Because he didn’t know anymore if what they were doing had ever been mutual, or if it had just been him, chasing a high, using someone he trusted to get it.

So he kept his distance.

And Taiki stayed quiet.

And between them, the space grew cold and unbearable.

Chapter 3

Chapter Notes

Sekai had not kissed Taiki in… days? Weeks? He’d stopped counting, because counting only reminded him of how often he used to crave that taste, that warmth, that intimacy he’d come to rely on more than he ever should.

He still talked to Taiki. Still cracked jokes, still exchanged glances when other members did something stupid. Still shared knowing looks when staff made awkward mistakes.

But he no longer reached for him.

With Taiki's absence, Sekai's cola addiction came back hitting him like a truck.

He found himself gripping cola bottles at night, one after another, chugging the sugary drink like it could drown the ache in his chest. He knew it was bad. His stomach felt sick sometimes, head aching from the overconsumption. But without Taiki—without those quiet, electric touches and kisses, his body felt like it was crashing. Every day, every night, he was on edge, bones itching for something that wasn’t sugar.

Tonight was supposed to be his night to unwind. He sat on the couch of his apartment, back slouched against the cushions, one leg hooked over the armrest while his fingers flew over the game controller. The glowing screen reflected in his eyes, bright hues of a battle sequence that he wasn't even really focused on. Next to him on the table were three empty cola bottles, a fourth one half-finished in his hand.

Then the doorbell rang.

His eyes flicked toward the door, frowning. He wasn’t expecting anyone. No delivery, no plans. Still holding the controller in one hand, Sekai dragged himself to his feet and padded across the floor in his sweatpants and loose shirt. When he opened the door, the words froze in his throat.

“…Taiki?”

The younger man stood there in the hallway, dressed in dark casual clothes that looked like he hadn’t changed out of them since work. His eyes were slightly red at the edges, hair slightly damp—like he’d washed his face just before coming.

Sekai blinked, brain stumbling. “What are you doing here? Is something wrong?”

Taiki didn’t answer. He simply looked up at Sekai, eyes intense but quiet, lips pressed in a thin line. Not angry. Just… unreadable.

“…Come in,” Sekai said eventually, stepping aside. “It’s late. You okay?”

Taiki walked past him without a word.

Sekai closed the door behind them, turning slowly. The sound of his game still played faintly from the living room. He followed Taiki in, still trying to get a read on his expression, but the younger hadn’t spoken a single word. Just stood there, back slightly hunched as if weighed down by something he couldn’t put into words.

“Sit down if you want,” Sekai offered, forcing his voice light. “I’ve got, uh, cola—never mind. Water, tea…? You hungry?”

Still nothing. Sekai’s steps slowed. His brow furrowed slightly, fingers loosening at his sides. He felt a weight build in his chest as he approached, slowly, trying not to startle him.

“…Taiki?”

That was all he said. Just his name. A low murmur. A call.

And then everything changed.

Taiki’s eyes lifted. Just a flash of brown meeting his. And suddenly, Sekai’s world tilted.

Taiki closed the distance between them in a second, hands rising, wrapping around Sekai’s neck as his lips crushed against Sekai’s mouth. It wasn’t soft. It wasn’t tentative. It was desperate. It was hot, fast and unfiltered.

Sekai was shocked, breath stolen—not just because of the suddenness, but because it was Taiki who had moved first.

Taiki had kissed him.

Sekai didn’t think. He couldn’t. His body responded before his brain could catch up. His arms instinctively wrapped around Taiki’s waist, pulling him closer, kissing back with just as much force. Their mouths collided again and again, teeth clashing slightly, tongues tangling. He could feel the tension in Taiki’s shoulders, the way he trembled faintly under his hands.

God, he missed this. Missed him. Missed the taste of his lips, the sound of his breath, the soft gasps that slipped between kisses. The heat of Taiki’s body against his, the way his hands gripped at the nape of his neck like he was afraid Sekai might disappear.

When they finally pulled back, it was only far enough to breathe. Their foreheads touched, hot skin pressed together, their chests rising and falling in sync.

Sekai kept his hands on Taiki’s waist, grounding them both. Taiki lifted one hand, brushing gentle fingers against Sekai’s cheek, eyes searching his. They were gleaming now. Exhausted and raw.

“…It’s been rough,” Taiki whispered. His voice cracked slightly. “The drama filming. Today was… the worst. Morning till midnight. No break. Got yelled all day. I—I couldn’t breathe anymore.”

Sekai felt something in him ache. He let one hand rise to Taiki’s back, slowly stroking up and down in calming motions. “I’m sorry,” he murmured. “You should’ve told me. You should’ve called.”

“I didn’t want to talk,” Taiki mumbled. “I wanted you.”

The words hit Sekai harder than he expected.

Taiki bit his own lip before speaking again.

“You said I’m your wife, remember?”

Sekai blinked. “What?”

“You said it, back then. That I’m acting like a wife.” Taiki’s voice was low now. “So that means you’re my husband.”

Sekai stared, stunned into silence. His heart was pounding so hard it made his chest ache.

Taiki leaned in a little more, their noses nearly touching. “So I can do whatever I want to my husband, right?” he whispered. “Now give me the damn dopamine.”

And then he kissed Sekai again.

This time it was slower. Deeper. Softer in execution, but somehow even hotter in sensation. Sekai melted. He kissed back with an urgency that had been suppressed for far too long, his hands sliding up Taiki’s back, gripping his sides.

Taiki’s lips were slick and warm, moving in perfect sync with his. He whimpered softly, a sound that made Sekai’s stomach tighten.

Sekai pulled off Taiki’s jacket in one fluid motion, letting it drop to the floor. His fingers found the hem of Taiki’s shirt, slipping underneath, feeling the heat of his skin. He mapped his way up Taiki’s back slowly, reverently, his palms flat against lean muscles.

Taiki gasped.

Sekai leaned forward, mouths still pressed together, and deepened the kiss again, tongue sliding against Taiki’s, pulling him closer until their bodies were flush. The tension snapped—the abstinence, the distance, all of it drowned under the force of desire that flooded between them.

“I missed you,” Sekai whispered against Taiki's lips. His voice was breathless, shaky. “I missed you so much.”

Taiki whimpered and bit Sekai’s bottom lip, tugging it gently before he spoke in a hushed, desperate tone. “Then kiss me. Kiss me again, Sekai-san. Like how you used to.”

And Sekai did. They kissed like they were making up for lost time, for all the weeks of restraint and distance and second-guessing. The air was thick with heat, with the rasp of breath and the sound of lips meeting over and over again.

Sekai’s hands moved down Taiki’s sides, sliding under his shirt again, caressing skin, tracing muscle. Taiki arched slightly, mouth falling open in a soft moan that Sekai swallowed hungrily.

When they finally broke apart, Sekai cupped Taiki’s cheek, stroking it gently with his thumb. Taiki’s lips were red and glistening, pupils blown wide, breath shaky. He looked absolutely wrecked and beautiful.

Sekai smirked softly, lips brushing against his flushed ear. “Do you want more dopamine?”

Taiki’s eyes widened. He bit his lower lip, something hungry flashing in his expression. And then he nodded, his voice low, almost sultry.

“…Yeah.”

Sekai’s heart raced. He leaned in, pressed a slow kiss to Taiki’s jaw, then to the corner of his lips, and whispered, “Then let me give it to you.”

He gently took Taiki’s hand, and pulled him toward the bedroom.

«────── « ⋅ʚ♡ɞ⋅ » ──────»

Sekai’s heart thumped in his chest as he pushed Taiki softly onto the bed, the mattress dipping under the younger man’s weight. Taiki lay back, eyes wide and soft in the warm lamplight, his breathing already shallow with anticipation. In that moment, he looked impossibly innocent—lips parted, cheeks flushed, pupils dark and inviting—and Sekai felt something feral stir deep within him. He leaned forward to press a tender kiss to Taiki’s forehead, fingertips brushing through the damp strands of hair.

Without hesitation, Sekai’s hands moved to Taiki’s shirt, clothes peeling away to reveal smooth skin. His lips followed, capturing Taiki’s mouth in a searing kiss, before trailing down to nip at his jaw, then the sensitive curve of his neck. Sekai sucked firmly in one spot, watching as a bright crimson bloom blossomed against pale skin, then flicked his tongue over it in slow, deliberate laps. Taiki mewled softly, one hand tangling in Sekai’s hair as he writhed beneath him.

Sekai’s mouth dipped lower, grazing the hollow at Taiki’s collarbone before finding the bud of his chest. He paused, eyes glinting with mischief, and then inhaled deeply of the young man’s scent before settling over his nipples. He flicked his tongue lightly across the hard bud, eliciting a shuddering gasp from Taiki.

With deliberation, Sekai took one nipple between his lips, sucking gently at first, then harder, tasting the sweetness of arousal. Taiki’s back arched, arms wrapping tighter around Sekai’s head as he moaned, “Sekai-san…” his voice thick and breathless.

Sekai swirled his tongue around the areola, flicked at the nipple with the tip of his tongue, then switched to soft, eager suckling that made Taiki’s hips jerk. He relished the way Taiki’s slender frame moved beneath him, tiny whimpers escaping his lips as he explored every inch of his chest with feather-light kisses. When Sekai finally leaned up to look at him, Taiki’s face was flushed, eyes half-closed, lips swollen and trembling with need.

With a grin, Sekai peeled off Taiki’s pants in one fluid motion, the fabric slipping down his hips until his boxer briefs were revealed—briefs that Sekai also wasted no time discarding. Sekai’s own clothes followed suit. He tugged his pants down and tossed them aside. They lay naked together, their body entwined on the bed.

Sekai paused to drink in the sight of Taiki’s body—slim waist tapering to hips, the pale expanse of his stomach rising and falling, thighs smooth and tantalizing in the dim light. Taiki’s cheeks flushed further as Sekai’s gaze roamed over him, and he pressed a teasing kiss to his navel before returning to lap and suck at his nipples once more.

Just as Sekai’s mouth closed over Taiki’s left nipple again, Taiki’s soft voice cut through the haze: “Sekai-san… why did you stop kissing me?” He sounded fragile, wounded in a way that tugged at Sekai’s heart.

Sekai froze, slowly pulling back. He saw, in that instant, the raw ache in Taiki’s eyes. He sat up and brushed a gentle hand across Taiki’s cheek, tracing the flush of color there. “I was worried,” he admitted quietly, voice thick. “Worried that I’d forced you into it. It was always me who started. I thought… if I kept asking, you might never feel free to initiate. I didn’t want you feeling trapped under my need.”

Taiki’s eyes widened in surprise, the vulnerability in his gaze breaking Sekai’s resolve. “No,” he whispered, voice fierce with emotion. “I wanted the kisses too. I wanted them more than anything.”

Sekai’s breath caught. “Really?” he asked, disbelief and relief warring in his chest. “You really wanted it?”

Taiki sighed. “What do you think I am?” he murmured, lips curving into a small, defiant smile. “I’m not some obedient student who can’t refuse. I never hated the kisses.” His leg brushed Sekai’s thigh, light but charged.

Sekai’s chest swelled with emotions. He scooped Taiki into a heated, desperate kiss, tongues colliding, teeth grazing. “I’m so glad to hear that,” he whispered against Taiki’s lips as they broke apart, foreheads resting together.

Their bodies ached with heat and passion. Sekai reached for the lube bottle on the bedside table, hands steady despite the pounding of his heart. Taiki watched, breath hitching, eyes dark with anticipation. Sekai gave him a gentle nod. “Tell me if it hurts,” he murmured, voice husky.

Taiki swallowed, nodding back, fingers curling around Sekai’s shoulder. Sekai warmed a dollop of lube between his fingers before guiding the first digit to Taiki’s entrance. He applied gentle, circular pressure until Taiki’s body loosened beneath him. With a soft exhale, he slid one finger inside, inch by inch, while pressing a kiss to Taiki’s temple. Taiki gasped, arching his back, breath catching.

“How is it?” Sekai asked, voice low as he stroked Taiki’s cheek.

Taiki’s eyes fluttered closed. He nodded, breathless. “Go on,” he murmured.

Sekai added a second finger, stretching Taiki carefully. He kissed along his jaw, then the curve of his neck to soothe any tension. Taiki writhed, soft whimpers turning into gasps of pleasure as Sekai slowly pumped two fingers inside him. When Sekai felt Taiki relaxing around him, he added a third finger, moving all three in a slow, rhythmic motion that teased and filled him perfectly.

Taiki’s body twisted in ecstasy, his moans became louder. His hands clawed at the sheets, knuckles white, and his hips began to move against Sekai’s fingers, chasing that delicious friction. Sekai leaned close to his ear and whispered, voice low and rough, “You’re doing so well, Taiki.”

Taiki hissed, “Sekai-san…” and arched his back, pressing himself down into Sekai’s fingers, seeking more. Sekai increased the speed in a smooth, controlled pace, fingers curling just right to stroke inside him, sending shivers through Taiki’s frame.

After several heart-pounding moments, Taiki’s moans became frantic, voice trembling with need. Sekai smiled against his neck—proud, tender, hungry. “You good to continue?” he murmured, trailing his fingers through the slick warmth one last time.

Taiki panted breathless. “Yeah.”

In an instant, Sekai shifted their position without warning, planting his back flat against the mattress. Taiki yelped in surprise as Sekai’s arms slid under his hips, guiding him effortlessly until Taiki straddled him, knees on either side of Sekai’s thighs.

The sudden reversal left Taiki breathless, eyes wide in the dim lamplight, innocence and desire swimming in their depths. Sekai’s grin was predatory as he brushed fingers along Taiki’s hip. “If you really wanted me,” he whispered, “if you still want me now, then convince me.”

Taiki’s cheeks flushed crimson. He bit his lower lip, heat flickering in his gaze. For a moment he hesitated, then leaned forward, pressing his mouth to Sekai’s in a kiss that spoke volumes. He deliberately rubbed his own length against Sekai’s hardness, moaning low and urgent.

“Okay,” he managed between kisses, voice thick and sensual.

Taiki took the lube that was placed carelessly on the bed, spread some on his palm and rubbed it to warm up. Then his fingers wrapped around Sekai’s hardened length, stroking slowly at first. His touch was gentle and full of curiousity. Sekai hissed softly when Taiki’s palm closed around him, thumb grazing the sensitive head.

“Why are you so big…” Taiki huffed, half-complained, half-excited. Sekai chuckled, the vibration rippling beneath Taiki’s hand.

“Thank you for the compliment,” he teased. Taiki’s other hand pressed against Sekai’s hip, grounding himself as he continued experimenting. Light strokes up the shaft, fingers dragging around the rim of the head, teasing the underside. Each flick made Sekai’s breath stutter, hips lifting involuntarily to meet the rhythm of Taiki’s fingers.

Satisfied, Taiki finally shifted his weight and slowly positioned himself at Sekai’s length. Their eyes locked—Sekai saw Taiki’s pulse fluttering at his throat, the way he trembled with both anticipation and fear. Sekai’s hand rose to cup the curve of Taiki’s hip, steadying him.

Taiki closed his eyes, bracing himself and slid down. The first inch was a sharp gasp from both of them—Sekai’s arms trembled as he held Taiki, and Taiki’s back arched, head falling back. Slowly, inch by inch, Taiki eased down until all of Sekai’s length was buried in him. The sensation of tight, warm, irresistible made both of them moan in unison.

Sekai wrapped his hands firmly around Taiki’s waist, guiding him gently. Then Taiki began to move, rocking once, twice, before finding a rhythm of his own. His pelvis rolled, drawing Sekai in deeper, and his sweet moans filled the room. Sekai watched, mesmerized, as Taiki’s hair swung lightly, his chest rising and falling, his lips parted in pleasure.

“God, you’re perfect for this,” Sekai groaned, voice husky. “You feel amazing, Taiki.”

Taiki’s cheeks heated at the praise, and he bit his lip to stifle a sound, but the next moan slipped out, richer and more ardent. His hands braced on Sekai’s stomach, pushing himself down in a smooth, urgent grind. Sekai’s fingers dug into Taiki’s hips, anchoring him as waves of pleasure washed over them both.

After several thrusts, Taiki’s legs trembled, and he collapsed forward, laying across Sekai’s chest. His breath was ragged, each inhale a whimper of exhaustion and delight. “Actually, this is exhausting…” he rasped into Sekai’s skin. “Didn’t I just tell you I had drama filming all day? And now you’re making me work again.”

Sekai just remembered that Taiki had been working all day, and he felt a bit sorry. “My bad,” he said as he stroked Taiki's head.

Taiki pushed himself up, blinking up at him. He tapped Sekai’s chest lightly. “I want the kisses too, okay? You’re not forcing me at all. I was just… too shy to start it.” His voice was sincere. “Please be convinced now, because I can’t move a muscle anymore.”

Sekai’s chest tightened with affection and desire. Without hesitation, he rolled them again—this time Sekai hovered above Taiki, heady and hungry. Sekai pressed a fervent kiss to Taiki’s lips, teasing tongue drifting between them, before allowing himself to sink back, Sekai’s length re-entering Taiki’s slick warmth in a single, slow motion.

Sekai began to move slowly at first, then building in speed until his hips pistoned in fast, slanted thrusts. Taiki’s hands flew to Sekai’s shoulders, nails digging in, his thighs tightening around Sekai’s hips as he gasped through the pleasure. He leaned forward, mapping every inch of Taiki’s face with kisses. First to the lips, then along the jawline, then whispering against the shell of Taiki’s ear.

“You feel so good, Taiki,” he murmured, voice low, “so tight and perfect around my cock.”

Taiki’s hands curled in the sheets as he tried to match Sekai’s pace, one hand slipping down to wrap around his own length, stroking in time with each thrust. His moans grew louder and echoed off the walls. “Sekai… san… I’m…”

With a final, high-pitched whimper, Taiki’s hips jerked as he spilled over his hand in thick, warm waves. The juice painted Sekai’s stomach, and it made Sekai’s breath hitch—pride and lust flaring hot. He caught Taiki’s blissful face, eyes fluttered shut and mouth gaping.

Sekai kissed Taiki’s forehead tenderly. “Good boy,” he praised, voice soft.

But Sekai didn’t slow down. He redoubled his short, fierce thrusts until a hot flood of sensation boiled over, and with a satisfied moan Sekai came deep inside Taiki, filling him completely. He pumped his hips slowly for a moment, letting the waves settle, then slowly stilled.

They stayed locked together for a moment. Sekai’s chest rising and falling against Taiki’s, their ragged breaths mingled. Slowly, Sekai pulled out, his seed oozing out warmly from Taiki’s hole. He reached for wet tissues and gently cleaned them both, brushing away every drop with tender care.

Taiki curled into Sekai’s side the moment they were done, draping an arm across his chest as Sekai lay beside him. Their naked bodies and legs tangled beneath the blanket. Taiki nuzzled his cheek against Sekai’s collarbone, eyes fluttering closed. Sekai wrapped an arm around him, drawing him close, pressing a light kiss to the top of his head.

“Taiki,” Sekai started after moments of comfortable silence. He wanted to talk, only to find the other already sleeping soundly.

Sekai chuckled softly, and decided to place it as tomorrow's problems.

Chapter End Notes

that was so filthy oh my god
*continuing to write more filthy story for the next chapter*

Chapter 4

Chapter Notes

warning: pure filthy 🥵

Sekai stirred, slowly emerging from the heavy warmth of sleep. The first thing he noticed was the absence beside him—the space where Taiki had slept was empty, but the lingering warmth was undeniable. Sekai’s hand reached out, fingers grazing over the faint indentation Taiki’s body had left. A lazy smile curled on his lips. It felt oddly intimate, the kind of morning he hadn’t experienced in… ever.

Sekai sat up, stretching his arms overhead, bones clicking in protest. His skin still smelled faintly of Taiki, of their night tangled together, and it made a quiet satisfaction bloom in his chest. He glanced around, eyes narrowing as he spotted his pants crumpled on the floor, but his shirt was nowhere to be seen. He tugged his pants on and padded barefoot out of the bedroom, hair messy and sticking up at odd angles.

The faint clatter of dishes and the unmistakable scent of toasted bread led him to the kitchen.

There he was—Taiki, standing by the countertop, awkwardly fidgeting with a butter knife, his back to Sekai. And there it was, Sekai’s shirt, drowning Taiki’s smaller frame. The hem nearly brushing the boy’s thighs, barely covering the boxer shorts that clung to his hips. Sekai leaned against the doorway, eyes soft, as he watched Taiki fight an internal battle with the simple task of making toast. The way Taiki’s shoulders tensed with each movement, the way he bit his lower lip in concentration, how his ears flushed red the moment he noticed Sekai’s gaze. Adorable was too tame for this scenery.

“Morning,” Sekai drawled, voice still rough with sleep.

Taiki jumped slightly, nearly dropping the butter knife. He turned, eyes wide, his blush intensifying. “Sekai-san… uh, good morning… I—um—I’m making breakfast.” He gestured nervously at the toaster, flustered as though he had committed some crime. “It’s just… toast. I hope you don’t mind.”

Sekai chuckled, shamelessly drinking in the sight of him. “Taiki, I don’t mind. You’re wearing my shirt, stealing my kitchen… might as well steal my breakfast too.” He pulled out a chair and slumped onto it, resting his chin on his hand as he watched Taiki scurry around, clearly unsure where things were but trying his best not to look out of place.

The silence between them was not uncomfortable, but heavy with the weight of what they had done last night. They sat across from each other at the small dining table, the only sound was the faint crunch of toast. Sekai watched Taiki avoid his eyes, cheeks still tinged pink, fingers fidgeting with the hem of the oversized shirt. The boundary they had crossed wasn’t just physical. It was bigger, louder, and now it sat with them like an uninvited guest.

Sekai reached for his coffee absentmindedly, but his hand froze midway. His eyes narrowed at the sight of a familiar can—no, not just one. A stash. Taiki’s gaze followed his, and a frown immediately formed as he spotted the pile of cola cans hidden messily near the counter. His expression darkened as he stood, hands on hips, the loose shirt hanging off him comically as he glared at Sekai.

“Sekai-san,” Taiki’s voice was sharp. “What is this? You’re back at it again?”

Sekai sighed, raking a hand through his hair. “Of course I am,” he muttered, glaring at his toast. “I stopped kissing you, didn’t I? I needed another fix.” His voice was calm, but beneath it was the hint of frustration.

Taiki’s brows furrowed, lips parting in a silent reprimand, but Sekai cut in first. “Before I realized it, you became my new dopamine, Taiki. And that’s… that’s not fair to you.” He exhaled, shoulders sagging. “They were right. It’s weird. Making a fellow member your dopamine source? That’s not right. You have your career, your own path. I can’t be dragging you into my bad habits.”

“Is that why you suddenly kept your distance from me?” Taiki’s voice was quiet, but there was something fragile underneath it. His hands trembled slightly.

Sekai nodded slowly, his gaze lowering to the half-eaten toast. “Yeah. I was worried. About groupmates doing this kind of thing. About me forcing you. You never started it, Taiki. It was always me. So I thought… maybe I was pushing you into something you didn’t even want.” He stabbed his toast like it had personally offended him. “But what you said yesterday… I’m glad, really, that I wasn’t forcing you all this time. But still… for groupmates…” The words trailed off, heavy with implication.

Taiki was silent for a long time, head bowed, his hands fidgeting with the edge of Sekai’s shirt. Sekai almost didn’t hear the soft confession that followed.

“You’re my dopamine too.”

Sekai’s eyes snapped up. Taiki’s cheeks were burning, but his eyes looked straight at him. “I still go to the gym. I still exercise. But… the dopamine you give me… when you kiss me, or when you hold me, that’s… that’s the best dopamine.” His fingers clenched the fabric tighter. “At first, I genuinely just wanted to help you get off your cola addiction. I thought if I could give you another way to get that dopamine rush, it would be enough. But the kiss affected both of us, not only you.”

Silence.

"It’s not just you anymore, Sekai-san. Now… I need it too.”

Taiki's voice wavered as he continued. “And maybe it’s not just dopamine anymore.”

Sekai’s heart skipped a beat. The air felt thin, pressing against his lungs as he stared at Taiki, at the way his head tilted slightly down, lips trembling, shoulders tense.

“Taiki…” Sekai breathed, not trusting his voice. “What are you trying to say?” he asked, though his own heart was already leaping to wild theories.

He could see Taiki panic slightly, as if surprised by his own words. The boy coughed awkwardly, turning his head away, his ears visibly red. The silence stretched, suffocating, until finally, Taiki spoke again.

“I don’t know,” Taiki murmured, so soft it barely reached Sekai. “I don’t know what this is, but… please don’t leave me again.” His voice cracked, and Sekai’s heart clenched. “We’re groupmates, yeah, I get it. But so what? As long as we both want each other… why do we have to complicate things?”

It was the final straw.

Sekai couldn’t bear it. He stood abruptly, the chair scraping back noisily as he crossed the distance between them in two strides. His hands cupped Taiki’s face, and before Taiki could blink, Sekai pulled him into a fierce embrace. Taiki stiffened for a second, then melted into him, arms looping around Sekai’s waist tightly.

Sekai kissed his forehead, pressing their bodies together, as if that would erase the doubts and uncertainties. His heart was pounding so loud, he was sure Taiki could hear it.

“I don’t know what this is either, Taiki,” Sekai murmured, voice low against Taiki’s hair. “But I don’t want to leave you again.”

And in that quiet kitchen, with toast growing cold on the table, Sekai and Taiki stood wrapped in each other’s warmth. The leaders were tangled in a confusing, intoxicating mess of dopamine and something far deeper.

Something they weren’t ready to name yet, but something they both desperately needed.

They didn’t need to define it. Not now. All that mattered was that they weren’t letting go.

«────── « ⋅ʚ♡ɞ⋅ » ──────»

Sekai sank into the sofa with a contented sigh, the soft sound of the TV filling the cozy living room. It was their rare off-day—no schedules, no rehearsals, no cameras in their faces. Just the two of them.

Taiki sat beside him, curled up with his legs folded on the sofa, looking every bit like he belonged there. He didn't expect to stay the night, so he was dressed in Sekai's fresh shirt and shorts. Hair still slightly damp from the morning shower, Taiki looked unreasonably soft.

“Taiki,” Sekai called lazily. “You got any plans today?”

Taiki looked up from his phone, shaking his head with that soft, sheepish smile of his. “No, Sekai-san.”

“Good. Let’s watch a movie.”

“What movie?” Taiki asked, eyes narrowing slightly as he scooted closer.

“I was thinking horror. Or maybe a good ol’ action flick.” Sekai’s eyes glinted mischievously, already imagining Taiki’s horrified face at jump scares.

Taiki grimaced, his face scrunching up adorably. “Sekai-san, you know I hate horror movies.”

“And you know I can’t sit through those slow-ass dramas you like,” Sekai shot back, complaining.

They bickered for a few minutes, but eventually settled on a compromise, that was Kamen Rider. More specifically, the Kamen Rider movie where half of FANTASTICS had been involved. Sekai, Sota, Keito, Sawanatsu. A project Sekai was fiercely proud of. Taiki had never really gotten into Kamen Rider, but Sekai figured this was a good way to lure him in.

As the opening credits rolled, Sekai’s entire posture shifted. His back straightened, his eyes gleamed, and he leaned forward, completely immersed. “Okay, Taiki, pay attention. This is the best part. So, Kamen Rider was originally—”

Sekai began to explain, voice animated, hands gesturing wildly as he tried to condense decades of Kamen Rider history into a few sentences. He didn’t notice the way Taiki was no longer looking at the TV. No, Taiki’s gaze was fixed on Sekai—the way his eyes sparkled with genuine excitement, the boyish grin on his lips, the slight flush of his cheeks as he talked about something he loved so passionately.

Sekai was mid-sentence, explaining the difference between the two Rider belts used in the movie, when Taiki’s hand gently cupped his cheek. Sekai’s breath hitched. The warmth of Taiki’s palm on his skin silenced him.

“Taiki—” he started, but Taiki didn’t let him finish.

Soft lips pressed against his, tender and light, as if testing the waters. Sekai’s heart lurched. He tasted the faint sweetness of Taiki’s breath, felt the nervous flutter of his eyelashes brushing his cheek. Sekai's eyes widened, caught completely off guard. Taiki was kissing him. The warmth spread through his chest like a wildfire.

Sekai naturally kissed back. But as soon as his brain caught up, he pulled back just enough to grumble, “You’re not interested in Kamen Rider, are you?”

Taiki smiled sheepishly, his thumb brushing Sekai’s cheek. “You said you wanted me to initiate.” he dodged the question.

Sekai stared at him, heart thudding in his chest, the weight of Taiki’s words sinking in slowly. His eyes traced the curve of Taiki’s lips, the slight tilt of his head, the innocent earnestness in his expression.

He groaned, flopping back against the sofa dramatically. “I’m flattered, Taiki, really, but not when I’m explaining an important scene in the movie.”

Taiki’s laughter was soft and melodic. He leaned in, pressing another kiss to Sekai’s pout. “I’m sorry, Sekai-san.”

Sekai’s pout deepened, his brows furrowing in mock annoyance. “Do you really think you can get away just by kissing me?”

Taiki pulled back slightly, his eyes sparkling mischievously.

“Umm, yes?” Taiki’s eyes softened into a doe-eyed innocence, his double eyelids creasing in a way that made him look devastatingly adorable. When he bit his lower lip, Sekai felt his entire resolve shatter.

A long, suffering sigh left Sekai’s mouth, defeated. “Unfortunately, you’re right.” He reached for the remote and turned off the TV with a resigned click. “You win, Taiki.”

The remote was discarded onto the coffee table with a thud as Sekai reached out, grabbing Taiki by the waist and pulling him onto his lap in one swift motion. Taiki yelped, giggling as he straddled Sekai’s thighs, arms automatically looping around Sekai’s neck.

Sekai cupped his cheek, thumb brushing along his jawline before their lips met again. This kiss was different. No longer a playful distraction. It was slow, deep, a melding of breath and warmth, their noses brushing, their bodies pressing closer as if they had forgotten what space was. Taiki tasted like the toast from earlier, sweet and buttery, mixed with something that was just him.

Taiki giggled into the kiss, the sound muffled but no less delightful. His hips shifted subtly, grinding into Sekai’s lap, making Sekai’s breath hitch. His fingers tightened their grip on Taiki’s waist as the kiss grew hungrier, more desperate. Taiki’s lips parted willingly, allowing Sekai’s tongue to explore, to taste, to claim.

“Taiki,” Sekai murmured against his lips, voice rough and low, sending shivers down Taiki’s spine. Taiki whimpered softly, his fingers threading into Sekai’s hair, pulling him closer.

Sekai’s kisses trailed down, from Taiki’s lips to his jawline, then lower to the slender curve of his neck. He sucked gently, delighting in the soft gasp that escaped Taiki’s throat. “You’re distracting me from the movie,” Sekai teased, his voice vibrating against Taiki’s skin.

Taiki tilted his head, giving Sekai more access. “You’re the one who turned off the TV, Sekai-san,” he whispered, his breath hitching as Sekai’s teeth grazed his collarbone.

Sekai chuckled, biting down playfully on Taiki’s shoulder, eliciting a squeak from the younger. His hands slid further up beneath the shirt, exploring the familiar planes of Taiki’s back, fingers tracing every dip, every curve.

Their heated kisses on the sofa cracked open a new craving, an addiction to the rush of each other’s bodies. Taiki’s eyes flickered down to Sekai’s length, hard and demanding against the fabric of his pants. Without a word, Taiki slid off the sofa, letting Sekai’s gaze follow him as he knelt between Sekai’s spread legs. Sekai’s breath hitched, pupils darkening with need.

Taiki’s fingers fumbled at the waistband of Sekai’s sweatpants, sliding the fabric down until Sekai’s hard length sprang free. The tip was red and slick with pre-cum. Taiki looked up with shy determination, lips parted slightly, eyes dark.

“Can I?” he whispered. His voice was husky, trembling with both nerves and desire.

Sekai reached down, hand tangling in Taiki’s hair at the nape of his neck, thumb brushing over damp strands. “Yeah,” he rasped, voice thick. “Of course.” He gave Taiki a gentle pull, guiding him closer.

Taiki closed his mouth around Sekai’s length, the warm, tight heat engulfing him. Sekai’s head falling against the sofa cushions as he let out a low groan. Taiki’s tongue slid along the underside, tracing slow, deliberate strokes. With each flick, Sekai’s body trembled. His hand left Taiki’s hair to cradle the back of his head, palm pressing against the soft skin of Taiki’s neck, guiding him deeper.

Taiki worked diligently, bobbing his head up and down, lips and tongue making Sekai’s length slicker by the second. The head of Sekai’s cock brushed against the back of Taiki’s throat, and Taiki gagged softly. He pulled back, coughing a little with watery eyes, before he pressed forward again, tryring to swallow Sekai in deeper. Sekai’s hips stuttered forward, thrusting lightly against Taiki’s lips. 

“Your mouth feels so good…” Sekai praised in shuddering breaths. Taiki moaned around him, the vibration sending shivers through Sekai’s spine.

Sekai’s other hand trembled as it stroked Taiki’s cheek, thumb brushing lightly over the curve of his jaw. Taiki looked up, gaze locking with Sekai’s, and Sekai felt every nerve in his body ignite. Taiki’s lips stretched around him, wet and strong, eyes shining with focus and a dreamy warmth. Sekai’s hips twitched involuntarily, pressing deeper into Taiki’s mouth, earning a soft gag again from Taiki as Sekai’s cock slid further down his throat.

When Taiki’s jaw began to ache, Sekai lifted himself from the sofa, so he towered over Taiki kneeling on the floor. He gripped Taiki’s hair gently, guiding his lips back to the waiting warmth. Sekai's hips thrusting with smooth force, driving himself into Taiki’s mouth.

Taiki’s eyes widened as he swallowed what he could, saliva and pre-cum dripping down his chin. His cheeks sucked in around Sekai, tight and pliant. Sekai groaned, the sensation of Taiki’s lips and throat clinging to him driving him wild.

As Taiki worked to please Sekai, his own need pulsed fiercely. His free hand slid down to his own shorts, fingers wrapping around his length. He stroked himself in time with his mouth, thrusting as he bobbed, the sensation making him moan around Sekai’s cock. He didn’t care about tomorrow’s sore throat.

Sekai’s grip tightened on Taiki’s hair. “Fuck, Taiki… you’re wrecking me,” he groaned, voice thick with need.

Taiki’s gag reflex fluttered, but he swallowed around Sekai with determination, fingers moving faster on his own erection. His restrained moans grew louder, more urgent.

Taiki’s hips eventually jerked hard as a warm release pooled in his hand. He stifled the moan against Sekai’s length, knees wobbling as he finished, warm spurts coating his hand. His eyes fluttered open, head bobbing slightly as he tried to steady himself, his mouth still stretched around Sekai’s cock.

Feeling the restrained moan against his length, Sekai’s control shattered. He put both of his hands on Taiki's head and groaned.

“Taiki… I’m…” His thrusts deepened, faster, each one driving him closer until he cried out and erupted—spilling his seed deep into Taiki’s willing mouth. Sekai’s hips jerked as he released himself, riding out the waves of pleasure, transferring every drop into Taiki.

After a moment, Sekai slowly pulled out and hovered over Taiki’s flushed face. Sekai stroked his own length, spreading the last spurt of his release across Taiki’s forehead, eyelids, cheeks, nose, and lips in glistening trails. The satin sheen of cum caught the light on Taiki’s skin, highlighting every sweet curve of his face. Taiki stared back, mouth slightly open, eyes heavy-lidded and lust-glazed.

“Look at you. So pliant… so beautiful covered in me. You give me the highest dose of dopamine.”

Sekai trailed a thumb along Taiki’s lower lip, coaxing him to part his mouth. He slipped two fingers inside Taiki’s mouth that was still full of his cum, swirling them around, playing with his tongue and taste buds, savoring the way Taiki moaned softly around the intrusion.

Then Sekai withdrew his hand and watched as Taiki closed his mouth and dramatically swallowed. Taiki then opened his mouth, tongue flicking out to show it was clean, and Sekai’s lips curved into a satisfied grin. He leaned in to place a gentle kiss on Taiki’s forehead. “Good boy,” he whispered, voice husky. His hand rose to ruffle Taiki’s hair affectionately.

«────── « ⋅ʚ♡ɞ⋅ » ──────»

They just couldn't stop.

They were like newlyweds, dizzy on desire, unable to stay apart for even a moment longer.

Taiki had only wanted to clean himself quickly in the bathroom after the impromptu blowjob, but Sekai opened the door and attacked him playfully. They were lost into another giddy making out session, this time while taking off all of their clothes. Sekai then pushed Taiki into the shower stall.

Steam curled around them in the small bathroom, warm water slushing over Sekai’s and Taiki’s naked bodies as though washing away every last bit of hesitation. Sekai pressed Taiki back against the glass tile of the shower wall, sliding his hands over Taiki’s wet skin and planting kisses over every inch he could reach. Taiki tilted his head back, lips parted, eyes fluttering shut as Sekai trailed wet kisses across his collarbone, down to the hollow at his throat.

Sekai's hands roamed without hesitation, palms sliding over Taiki’s chest, fingers flicking at the peaks of his nipples. Taiki’s body arched beautifully under his touch, breath hitching as Sekai’s tongue replaced his fingers, swirling over a nipple before sucking it deep into his mouth. He bit it lightly, just enough to make Taiki shudder and gasp, fingers clenching against Sekai’s shoulders.

“Your moans are so addictive,” Sekai whispered against the hardening bud, his breath warm, lips dragging to the other side to repeat the same worship. “I could get drunk on those sounds.”

Taiki’s answer was a sweet moan, his back pressing harder against the glass, hips subtly rolling forward as if his body couldn’t help but seek Sekai’s.

Sekai paused only long enough to pour a dollop of foamy soap onto his hand, then turned Taiki so his front was pressed flush against the glass wall. The water was still pouring down over them, warm and wet.

Sekai’s fingers slicked with soap glided between Taiki’s cheeks, teasing the entrance of his drenched hole. Taiki gasped, body trembling at the cool surprise of the lather. Sekai wiggled a finger inside, sensing how loose Taiki was from their night before. He immediately put in three fingers, thrusting playfully at first, then with growing pace, slick and insistent.

Each push sent Taiki’s hips rocking, pressed against the glass, cheekbones brushing the cold tile.

“Sekai-san…!” Taiki gasped, his tone wavering between a plea and a demand. His legs quivering with every curl of Sekai’s fingers. “Enough already… just put it in!”

Sekai’s laugh rumbled deeply in his chest, his lips grazing Taiki’s shoulder. “What a brat,” he teased, withdrawing his fingers.

He poured a blob of soap, stroked it on his own length and pressed it against Taiki’s entrance. He rubbed the head in small, torturous circles, hearing Taiki’s frustrated whines. “You want it that bad?”

“Please…” Taiki’s voice trembled, sweet and breathy. “Please, Sekai-san… put it in…”

Sekai’s restraint snapped. With a deep groan, he thrust into Taiki’s body, both of them moaning as he sank in to the hilt. The heat, the wetness, the tightness—it was intoxicating. Sekai gripped Taiki’s waist, thumbs pressing into the soft flesh of his hips as he began to move, his pace immediately fast and relentless.

The sound of skin against skin echoed in the bathroom, mingling with the rush of water and Taiki’s choked moans. Hands no longer idle, Sekai cupped Taiki’s nipples between thumb and forefinger, pinching lightly before rolling them with practiced teasing.

“You take me so well, Taiki…” Sekai’s mouth was relentless, lips and teeth marking Taiki’s neck, shoulders, his tongue tasting every inch as if he’d never get enough. He sucked a particularly sensitive spot until it bloomed red.

Taiki’s breath came in short, broken gasps. His body shuddered violently, and with a strangled moan, his climax hit him hard, untouched. His release splattered onto the glass wall, sliding down slowly in a sinful trail. Sekai groaned at the sight, his pace faltering for a second.

“Fuck… looks like you’ve got some hidden talents,” he whispered against Taiki’s ear, biting gently at the lobe.

Taiki’s face was a mess of pleasure and embarrassment, his cheeks burning crimson. He tried to retort, pretend to be annoyed, but his words dissolved into high-pitched whimpers as Sekai resumed his thrusts, faster and deeper, each stroke coaxing more moans out of Taiki’s pliant body.

Sekai’s release built rapidly, his grip tightening around Taiki’s waist as his rhythm turned erratic.

“Taiki…” Sekai groaned as he released himself, voice low and raw. He buried himself deeper, flooding Taiki’s hole with a hot wave of his own seed.

Taiki whimpered as he felt the warmth bloom inside him. Sekai leaned over his shoulder, still moving in small, slow thrusts, ensuring every drop was pushed deep.

When the tremors subsided, Sekai gently withdrew, turning Taiki to face him. Their eyes met, damp hair plastered to their foreheads. Sekai leaned in for a soft kiss as the shower continued to wash them clean. Taiki clung to Sekai’s neck, fingers threaded into Sekai’s hair, kissing him back.

They giggled between kisses, teasing each other with soft nips and murmured sweet nothings. Eventually, they managed to shift into a proper bath, scrubbing each other with playful splashes and fond smiles. Their touches were lighter now, more intimate in the way that spoke of comfort.

They couldn’t get enough of this—of each other. This dopamine that no cola, no caffeine, no thrill of performance could ever replace.

The rest of the day passed in a haze of quiet, shared contentment. They sprawled on the sofa, tangled in blankets, binging through a Netflix series. For once, their hands stayed to themselves, fingers only intertwining softly. The dopamine of stolen kisses and intense lovemaking had been enough for now to let them simply relax.

By the time evening arrived, Sekai found himself just watching Taiki. Taiki was hunched over, slurping on takeout noodles with a casualness that made Sekai’s heart ache. The way Taiki’s brows furrowed slightly when he read the takeout receipt, the way his lips puckered when tasting the spice—it was stupidly adorable.

“Sekai-san? What’s wrong?” Taiki asked, glancing up, chopsticks mid-air. “You want more chili powder for the noodles?”

Sekai didn’t answer. He simply moved closer, resting his head against Taiki’s shoulder, nose burying into the crook of his neck. The familiar scent of his soap lingered on Taiki’s skin, now mingled with something uniquely Taiki. Sekai closed his eyes, breathing in deeply, memorizing the scent as if it was his lifeline.

He didn’t want to think about the complicated parts. About what this meant for the group. About the lines they kept crossing. Not yet. For now, it was enough, more than enough that Taiki wanted this too. That Taiki chose to stay.

“Thank you for staying,” Sekai whispered against Taiki’s skin, so softly that Taiki might not have heard. Or maybe he did, because he showed the cutest soft smile Sekai ever seen.

This was dangerous. Addictive.

But Sekai didn’t care. For now, all he needed was Taiki here.

Right here.

Chapter End Notes

the bathroom sex scene was actually unnecessary and unplanned. but i wanted to see them having a bathroom sex. so i wrote it. lol 😋

Chapter 5

Chapter Notes

It had become a dangerous habit, Sekai realized.

Ever since the rest of FANTASTICS caught on to the little thing between him and Taiki—their so-called “dopamine fix”, and the fact that they accepted it and even teased them for it, Sekai found himself getting bolder. Maybe too bold. He would find ways to tease Taiki, especially during rehearsals. A passing brush of fingers when no one was looking, whispering in Taiki’s ear until his neck flushed a deep pink, or cornering him in hallways just to enjoy watching him squirm under his gaze.

But no matter how bold Sekai got, he never made the same mistake twice. Not after that day.

He still remembered it vividly. The way Taiki had turned as red as a traffic light when Sekai had, in a moment of playful mood, pressed a kiss to his corner of mouth right in front of everyone. The loud gasp Taiki let out, the way his arms flailed, slapping Sekai’s chest so hard it actually stung.

“Sekai-san!” Taiki had shrieked, face flushed from his ears to his neck. “Be appropriate! There are a lot of people!”

The studio had erupted in laughter. Horinatsu nearly fell off his chair. Sota had to hold onto Keito to stop from doubling over. And Sekai… well, he learned his lesson. That one slap had a weight heavier than it seemed.

Since then, Sekai played it smarter. Subtler. He would lean in as if whispering instructions, only to murmur something teasing. Or he’d stand too close, his breath deliberately tickling Taiki’s ear.

Those were the kind of moments Sekai lived for now. Because he already admitted it albeit only in his heart, that it wasn’t just about the dopamine anymore. It was about Taiki. The way he blushed, the way he fumbled, the way his eyes widened and lips parted as if he couldn’t keep up with Sekai’s pace. That was the real addiction.

Sekai had dramatically cut down his cola intake and yes, Taiki was proud of that. But Taiki being Taiki, he found something new to nag about.

Sekai still indulged in junk food, and Taiki was determined to rip it away from him.

“Sekai-san, I brought you lunch.” Taiki said one afternoon, sitting beside him during rehearsal break, holding a transparent bag filled with lunchbox and bottle in his hands.

Sekai glanced up from his Switch, eyes narrowing suspiciously. It was filled with... whatever green mixture Taiki had decided was ‘good’ for him today.

“Taiki, it’s green.” Sekai’s face twisted. “Green and mushy. It looks like frog guts.”

Taiki huffed, arms crossing as he glared down at him. “It’s avocado chicken salad and mixed vegetable juice. Very healthy. Full of good fats.”

“Good fats? Isn’t that a contradiction?”

Taiki crouched down beside him, snatching the controller from Sekai’s hands without warning. Sekai’s in-game character died instantly, and he scowled.

“Hey!”

“You’ve been doing so well cutting down cola, but you’re still eating hamburgers, fries, fried chicken… I can’t just watch you ruin yourself.” Taiki’s voice was firm, lips pressing into a pout.

Sekai clicked his tongue, leaning back into the sofa. “Taiki, do you know how many calories I burn in a single dance rehearsal? All that junk gets obliterated. Science.”

“Sekai-san,” Taiki’s tone sharpened, “Stop with that excuse. Your insides don’t care about your calories. All that grease and oil are not magic. They stay in your body, messing with your heart, your liver—”

“You’re so noisy!” Sekai pinched Taiki’s cheek, pulling it gently, earning a yelp. But Taiki knew better now—he dodged Sekai’s sneaky attempt to get closer and stood up, still holding the lunch bag.

“I won’t let you kiss me or do anything to me before you eat and drink this.” Taiki’s eyes gleamed with challenge, his chin tilted up defiantly.

Sekai’s brow twitched. He looked up at Taiki with an expression that could probably be used to kill a man.

The nerve. The audacity of this boy.

Taiki’s declaration echoed in the room, catching the ears of their fellow members, who burst into roaring laughter.

“Whoa, whoa, Taiki-kun’s got the upper hand today!” Sota’s voice rang out, followed by Yusei’s cackling.

Horinatsu grinned. “It’s rare to see Sekai-san getting bullied like this.”

“Sekai-san, is this how you treat your wife? No wonder he’s rebelling!” Leiya added, sending the group into another fit.

Sekai sighed, long and exaggerated, snatching the lunch bag with the resigned air of a defeated man.

“Fine. I’ll eat it. But I’m doing this under protest.”

Taiki plopped back down beside him, hands resting neatly on his lap, watching Sekai with sparkling eyes, his smile victorious and almost blinding. Sekai didn't stop grimacing as he chewed the food.

“God, they’re so domestic,” Keito commented when he watched Sekai obediently eating. “I’m getting secondhand embarrassment.”

“You’re really like a proud wife, Taiki-kun!” Sawanatsu teased.

Surprisingly, Taiki didn’t deny it. His eyes softened, his gaze flicking to Sekai, and he answered without missing a beat, “I am.”

The rest of the members were losing it.

“AAAAAAAAAA!!”

“OH MY GOD, HE SAID IT!” Horinatsu shrieked.

“Someone call the registry office!” Yusei shouted between gasps.

Sekai nearly choked on his salad. He forced the rest down as fast as humanly possible, and drank the questionable green juice in record time. Then he dramatically raised the empty container and bottle like a trophy.

“I did it. Look. Empty. Happy now, Taiki?”

Taiki clapped his hands, his applause soft but proud. “Well done, Sekai-san! Everyone, give a cheer to our leader!”

The members cheered dramatically, clapping and whistling, making the atmosphere ridiculously lively. Leiya whistled the loudest as he yelled, “Good job, Sekai-san! Maybe you’ll live past forty now!”

Sekai smiled sarcastically, then stood up abruptly.

“My turn,” he said, voice low.

Before anyone could react, Sekai grabbed Taiki’s wrist, pulling him to his feet. The room immediately filled with predictable chaos.

“Oh my god, they’re going to do it,” Yusei gasped dramatically.

“They’re not even hiding it now!” Sota covered his mouth with hands.

“Don’t be too rough, Sekai-san! We still have filming after this!” Sawanatsu added with a grin.

Taiki’s face turned crimson. “S-Stop it, everyone! Sssh, sssh! Don’t say weird things!” He flailed, trying to hush the commotion, but Sekai didn’t give him a chance to escape. His grip on Taiki’s wrist was firm, and he was already leading him toward the door.

Before Sekai closed the door, he paused, peering back at the members.

“Don’t disturb us again.” His eyes locked onto Leiya. “Leiya, I’m talking to you.”

Leiya immediately stood up, hand saluting with exaggerated formality. “Roger!!!! I don’t want to be traumatized again anyway!!”

The laughter that followed echoed down the hall as Sekai finally shut the door, a triumphant smirk playing on his lips.

Back in the studio, the remaining members fell into a collective sigh.

“I’m tired of this game,” Sawanatsu huffed, exasperated.

“They’re not fooling anyone anymore,” Keito added.

“We should start betting on when they’ll drop the ‘dopamine’ act and just confess already,” Horinatsu muttered.

“Yeah, but at this rate, we’ll die of old age before that happens,” Sota quipped, earning a chorus of tired agreement.

Meanwhile, Sekai didn’t stop until they reached their usual hideout—the vacant equipment room tucked away at the far end of the agency building. He kicked the door shut, locking it with a soft click.

The second they were alone, Sekai had Taiki pinned against the wall, lips immediately devouring his in a needy kiss. Their mouths moved in perfect sync, tongues sliding, breaths mingling, as if the air in the room wasn’t enough unless they shared it.

Sekai’s hands roamed Taiki’s body, feeling the dampness of the sweat resulted from rehearsals, loving the way Taiki’s skin still glistened. He trailed kisses down Taiki’s cheek, his tongue licking a bead of sweat that had dared to roll down his jawline.

“You taste better than any cola, Taiki,” Sekai murmured, his voice a dangerous purr against Taiki’s ear.

Taiki shivered, his fingers tangling into Sekai’s shirt, tugging it up to feel the heat of his skin. His palms slid over Sekai’s toned stomach, stroking the lines of muscle as if memorizing them. “You’re still so sweaty, Sekai-san…”

“I thought you liked me this way?” Sekai smirked, grazing his teeth along Taiki’s neck, savoring the small moan that escaped his lips.

Their kisses were messy, desperate, a clash of teeth and tongues. They laughed between kisses, muffled giggles escaping as their noses bumped and hands fumbled. Taiki’s fingers curled into Sekai’s shirt, pulling him impossibly closer.

“Sekai-san…” Taiki whispered against his lips, breathless. “You won’t stop… this, will you?”

Sekai’s gaze softened as he stared into Taiki’s eyes. He traced his thumb over Taiki’s cheek, letting it linger on the curve of his lips. His answer was simple, honest, and without hesitation.

“No, Taiki. I don’t think I will stop kissing you.”

Their mouths met again, deeper this time, sealing a promise that neither of them dared to put into proper words yet.

It was something intoxicating, something addictive. Their very own dopamine.

And neither of them wanted to stop from being addicted to it.

END

Chapter End Notes

this story was so full of sekai and taiki kissing... 😳
and they're not dating yet LOL 😂
actually i don't know how to make sekai admitting his feelings to taiki...
i want them to have some conflicts before they confess their love to each other. do you guys have any idea?
i might write the sequel if i have the idea. 😆

Afterword

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