Work Text:
You don't have to be a detective to deduce exactly where it all went wrong.
Pretty much the entire day went as usual. The six of them had their Music Bank recording, which came with all the usual hustle and bustle Sion had long since grown used to. He even enjoyed a lot of it - getting his hair and makeup done, being put in a cute outfit, getting to perform with his friends. He's in a good mood the entire time they're messing around backstage, happy to play up for the camera, and that's when things started to take a turn.
Riku was in his blue tank top outfit, the one that had already driven Sion crazy whilst they were filming the MV, and the light, soft material made his chest look even more tantalising than normal. It hugged him in all the right places, his toned, tanned arms fully on display, and Sion could see why Riku's been driving the fans crazy lately. So, he couldn't be blamed for the way his hand reached out to rub Riku's chest, his hard nipples pebbled under Sion's rough palm, his other arm hooked around Riku's neck and the two of them giggling like it's just some friendly roughhousing for the camera's benefit.
He never knows how to stop himself from doing it -wrapping his arm around Riku's shoulder and letting his hand rest over his chest to cop a feel, leaning against him with his bicep brushing his nipples, or even just lewdly reaching out in front of him. Riku doesn't mind, has never minded, and this occasion was no different.
Riku had been teasing him about copying his famous hamster pose for a photocard, Sion had teased him back, he'd groped him for a couple of seconds, and that had been that. In isolation, nothing too out of the ordinary, and nothing Sion needs to worry about. They'd recorded their performance a little after that, which went off without a hitch, and they were waiting around to film some challenges when he made his next mistake.
He was fiddling with the 3D star on his shirt absentmindedly when he noticed the way Riku's eyes flickered to his chest. He'd been playing a game on his phone, but there was no doubt Sion had drawn his attention, an observation which was confirmed when Riku smirked. It was a light little thing, barely there, but Sion noticed it. He always notices these things about Riku.
He pressed his lips together, hiding his own smile, and sat up straight, shoulders pushed back. His own tank top stretched taut against his chest, and he knew his nipples were visible through the thin fabric. Riku glanced down, and Sion found himself twisting in his seat, turning his chest towards the younger man and leaning into his space.
He doesn't know exactly why he did it, he just knows that before he could sit back, Riku was reaching out to twist the centre of the star between his fingers. He didn't even look as he did it, face turned away from Sion to talk to - whoever, Sion can't even remember. He'd gulped, mouth suddenly dry as Riku gently tugged at the material, coaxing it to stand like he might- as though it was-
Riku's hand dropped from his chest all too quickly, and Sion was left trying to will himself not to get hard at the thought of Riku's long, delicate fingers teasing his nipples instead.
That's the trouble with Riku. Or with Sion, more accurately.
He has a tendency to drive Sion crazy with everything he does, no matter how small, no matter how innocent, no matter how absentminded. A hand on his chest as they're waiting to perform, a look up through his eyelashes that Sion would take as purposefully flirtatious if he saw it worn on anyone else's face. A small smile from across the room that Sion almost lets himself believe is reserved just for him. A tanned, toned arm drawing goosebumps along his own. A soft sigh as they hug. The word 'hyung' from his lips. Anything. Everything. Every single fucking time.
It's been years since it started, but only months since Sion sat down and had a chat with himself about what all of this meant. He'd had it in the hopes that acknowledging his feelings and holding space for them would make it easier to be around Riku, but looking back, he thinks he simply just couldn't hold it in any longer. Even if the only person he told was himself.
Unfortunately, Sion's efforts seem to have been in vain. With every passing day, week, month, Riku seems to grow more confident, more happy, and with that, more beautiful. More irresistible. Sion thinks he might be going insane.
It was a little later that afternoon that Sion made his third mistake. "Hey, Riku-yah, get in here," he'd grinned from his place inside the Music Bank banister. He'd been experimenting with poses, the cool metal against his thigh, and getting Riku to join him in the tight space had seemed like a genius idea. Cute photo? Check. Funny content for the fans? Check. Getting Riku all up in his personal space so he can subtly sniff his coconut-scented shampoo and feel his warm body against his? Check.
It was foolproof, the perfect con, exactly what Sion needed to find an excuse to pull Riku in far closer than what would normally be appropriate. There was literally no way it could go wrong.
Until Riku dropped to his knees in an attempt to squeeze in, and his face ended up inches from Sion's crotch.
"Um, maybe not like that," Sion mumbled at the same time as Riku's ears flushed pink. He ducked back out, brows furrowed in concentration. Sion had tried really, really hard to forget what Riku looked like on his knees in front of him, but he needn't have worried. He forgot his own fucking name when Riku hitched a leg up, climbing in and twisting so his ass was flush with-
"Oh fuck," Sion whispered breathlessly. His curse was covered by Riku's giggles, like this whole thing was just the funniest thing ever, as if Sion's dick wasn't threatening to jump out of his jeans with the force of the blood rushing to it.
He'd eked out the best lighthearted chuckle he could muster, raising his hand so it's not pressing against Riku's plush behind, and mumbled out some words of encouragement as he'd watched Riku all but grind himself back against him in an attempt to wiggle in. Once they were in, there was no room for manoeuvre, and Sion had wrapped his arm around Riku's shoulders and tried to look relaxed as they posed for the photo he'd almost forgotten about.
Sion had thanked any and all gods for allowing his white jeans to be at least a little baggy at the crotch, blacked out as Riku had clambered back over the bannister a few moments later, and then let out a breath he'd known full well he was holding.
And that brings him here. Laying like a starfish on his bed, his eyes closed, and with absolutely no idea he's about to make mistake number four of the day.
Unfortunately, closing his eyes hadn't stopped the visions of Riku pressed against him ass-to-cock that had plagued him the rest of the afternoon. In fact, it had only made them stronger, as if someone had drilled into his head to graffiti the image on the inside of his eyelids with a teeny tiny evil little brush.
It hadn't stopped his other senses, either. Sion feels his whole body flush hot as his fists clench on top of his hips, his traitorous mind conjuring up the feeling of Riku's hips beneath them instead. He gnaws on his lower lip, brows furrowing. Riku had been so warm against him, so soft. It would've been so easy for Sion to just… press forward, drag the outline of his cock over Riku's ass. Grip his narrow hips and pull him back against him. Shit.
Sion cants his hips up, his cock straining and throbbing in his sweatpants. He's not even touching himself, but the taut material of his boxers over his cock as he grinds up against nothing makes him feel like he could be minutes away from the most pathetic orgasm of his life. And he's so wound up, he doesn't even care.
Suddenly, they're naked in the fantasy, their clothes nowhere to be seen, and Sion's flushed cock is resting on Riku's tanned skin. Real Sion swears, warm. "Riku, fuck."
His fantasy hands move to splay across Riku's perfect fucking ass cheeks and then they're pulling them apart, thumbs indenting the skin and putting his tight little hole on display and he can almost hear Riku gasp- wait.
Wait.
Slowly, and with terror in his heart, Sion opens his eyes.
Riku, real, actual Riku, is standing in his doorway, frozen mid-motion and with his big, gorgeous eyes wide in shock.
"Um," Sion says eloquently.
"Um," Riku echoes.
Sion looks down at his body, wondering if there's any way he can pretend his rhythmic rocking against the bed was because he's suffering from some sudden onset back pain and not from having a hard-on the size of Jupiter. His cock twitches back at him and tells him that there is not. He sits up, shifting himself back until he can lean his back against the headboard, and pulls his knees up so his erection is trapped against his stomach and not under Riku's intense gaze.
Sion clears his throat, gearing up to speak at the same time as Riku blurts out "so, what's up?"
Sion looks at him, eyes narrowed. "Uh," he stammers. "Nothing much."
"Really?" Riku asks, tilting his head in a way he probably doesn't even realise is deeply sultry. He steps into the room proper, abandoning the doorway, and the lock clicks shut behind him.
Sion gulps.
"'Cause," Riku continues, stepping closer. The floorboards creak below him. Sion's head spins. "It kind of seems like there is something up."
"No," Sion says lamely, uselessly. It's futile denying it, but what else can he do? He wraps his arms around his knees as if it'll protect him from the accusation to come. Is it called an accusation if it's true? Or would it simply be an observation? Sion glances down in thought, or maybe cowardice, and suddenly Riku's in front of him, perched on the edge of his bed.
He leans forward on his hands, body turned towards Sion as he grins. "Sion-hyung," he says, quietly, his eyes flickering down so there's no mistaking his meaning. "It kind of seems like there's something big up. Something really big."
Sion groans, and just like that, the tension between them is broken. It's replaced by something else, something equally as exciting and no less terrifying, and all Sion can do to cope with it is reach behind him and throw his pillow at Riku who catches it with a laugh.
"Come on, hyung," Riku urges. He puts the pillow to one side, creeping closer. "Don't be like that."
"Like- like what?" Sion struggles, tongue-tied. He feels pinned to the headboard by Riku's gaze, the younger's big, desperate eyes accentuated by his soft pout. He's doing it on purpose, Sion knows it. He's teasing him.
"You're the one who suggested the photo," Riku says. "You're the one who said 'hey, Riku-yah, come and grind against me in this tight space' and then immediately got a hard-on."
Sion splutters in disbelief, going pink. "I did not say that!"
"But you did get a hard-on," Riku grins. Sion blinks at him, caught.
Riku shifts forward a little more, drawing his legs up in front of him until he's sitting cross-legged on the bed. He reaches out, tugging at Sion's trouser leg.
"Let me see," Riku tries.
"What!" Sion's voice comes out in a squeak, and he looks at Riku for any sign that he might be joking. A quirk of his lips, a glimmer in his eyes, a wiggle of his eyebrow. But there's nothing but sincerity in Riku's gaze, for once not averted to the side, and Sion can't breathe.
"If I'm reading this wrong," Riku says, voice still quiet as if anything louder might scare Sion into running. "Say the word, and we can forget all about it."
Sion looks at him. Really, really, looks at him. He thinks about those feelings of his, those pesky feelings, the ones he'd buried down and only let free in small, secret increments; in soft, sincere touches Riku probably never even noticed. He thinks about their friendship, their genuine closeness, the trust between them, and worries that this might ruin everything.
And then he thinks about the way Riku looks at him now, the plea in his gaze, the shake of his hand still gripping his trouser leg. And he realises that Riku is looking at him in the way Sion had always dreamed.
"Riku-yah," Sion breathes. "Baby."
"Hyung," Riku whispers back. "Show me."
Sion presses his lips together, finding himself unable to move. He's long since gone soft, the shock of Riku appearing in his bedroom as well as his inner turmoil and Riku's impromptu confession causing far too much of a distraction for his erection to withstand. Riku must notice the blush sitting high on the apples of Sion's cheeks and recognise that he's too embarrassed, because he's soon tugging at the hem of his own t-shirt, pulling it over his head with a swoop.
"Does this help?" Riku leans back on one hand, trailing his fingers over his tanned chest. "I know you like my chest, hyung."
"Oh," Sion murmurs. "I…"
"It's okay," Riku insists. "You can say 'Riku-yah, I always love groping your chest'. It's nothing I don't already know."
"Fucking hell," Sion groans, his head knocking back against the headboard. He's used to their back and forth, used to being teased by Riku and teasing him back in turn. But this? He feels laid bare, every sentence from Riku's mouth revealing that Sion's deepest darkest secrets were never hidden to begin with.
He watches through lidded eyes as Riku smooths his hand over his own chest, squeezing at his pecs and rolling his nipples between his fingers in the same way he'd tugged at Sion's shirt earlier that day. Sion's breaths deepen, and he feels his cock twitch against his thigh.
"I'll let you touch if you show me," Riku says. "Show me your cock, hyung, I already felt it. I wanna see."
Sion promptly realises that his self-control is waning along with his shyness, and all it takes is one soft, raspy moan from the man in front of him and it snaps entirely. "Shit," Sion curses, finally lowering his legs. He rests his hand over his crotch, attempting to rub his cock through his sweatpants, but Riku stops him with a hand on his wrist.
"I don't care if you're soft," Riku says obscenely, "just show me."
Sion nods. He obediently tugs his sweatpants down over his ass, throwing them to the floor to join Riku's shirt. His fingers tremble as he hooks them under his boxers, pulling them down mid-thigh.
"Mm, fuck," Riku hums, leaning forward. "Fuck, hyung."
Sion's chest heaves with the force of his breaths, his cock quickly filling out under Riku's heated gaze. Riku looks mesmerised, and Sion moans softly as he watches the way he licks his lips, mouth watering. His fingers clench in his thighs, unsure if he's meant to touch himself. He feels knocked off-kilter, like someone's pulled the floor out from under him. Riku reaches out, stroking Sion's ankle.
"Relax, hyung," he says. "It's just me."
Sion huffs out a laugh. "Riku-yah, it's because it's you."
Riku smiles, a small, genuine thing. Secretive, like only he and Sion know the reason, even though they're the only ones in the room. "I know."
Sion nods, fingers creeping closer to his cock. He's fully hard, now, resting against his stomach, and he's getting desperate. The sight of Riku in front of him, half-naked in his bed like something out of one of his wet dreams, is making his brain feel numb.
"Go on," Riku urges. He bites his lip, watching with rapt attention as Sion finally wraps his hand around himself. They groan in tandem, Riku's eyes locked on the way Sion begins to rub his hand over his length, Sion's on the way Riku gulps and leans even further forward.
"Shit," Sion whispers. He feels drunk. This is all so surreal. Is he dreaming?
"Were you gonna do this before I interrupted?" Riku asks, his warm hand still on Sion's ankle. Sion nods, embarrassment evaporating with every stroke of his hand. Riku grins. "Were you gonna think of me?"
Sion laughs breathlessly. "Yeah. Are you gonna keep asking questions?"
"Yeah," Riku says. His fingers start to trail up Sion's leg, his touch hot on his skin. "Do you think about me like that often?"
Sion groans. "Stop it." He continues his motions, his palm dry against his shaft. At this point, he'd usually reach for the lube to ease the slide, but he isn't sure if he should. Riku seems to notice his inner turmoil, crawling forward until he's leaning in. Sion thinks he's about to kiss him, his own lips parting, but instead he watches as Riku gathers saliva in his mouth and lets it drip out over his tongue - directly onto Sion's waiting cock.
"Holy fuck," Sion groans, voice cracking. "Baby."
"Looked dry," Riku says simply, glancing up through his eyelashes. That gaze, those eyes. Sion squeezes his hand around his cock, grabbing Riku by the back of the neck with his other hand to pull him in and crash their lips together. Riku gasps into it, eyes slipping shut and lips parting instantly so Sion can lick his way into his mouth. Riku slides his tongue against Sion's before sucking it into his own mouth, his hands landing on Sion's bare thighs.
He swallows Sion's groans, his big hands smoothing up Sion's legs to his hips. He rubs his thumbs over them, all soft skin pulled taut over bone, holding them still when Sion begins to wiggle. He pulls away from the kiss to look down at the way Sion's hard, wet cock disappears under his fist, pulsing against his palm.
"Hyung," Riku whispers, no reason to speak any louder when they're so close. "Can I try?"
Sion moans, biting his lip as he nods shakily. He lets Riku knock his hand away, and all he can do is clench them in the sheets and whimper as he feels Riku wrap his long fingers around him for the first time.
He's jerked off a thousand times, but he's never had anyone touch his cock before. It feels incredible, pleasure wracking through him as Riku rubs his thumb over the tip. "Fuck, fuck- Riku-"
Riku grins, looking up at Sion's face and leaning in to flick the tip of his tongue over his lips. His eyes sparkle with mischief as he sinks down towards Sion's cock, and he repeats the motion of his tongue over the head.
"Oh!" Sion moans. "Oh-"
Shame washes over him as he watches his cock pulse with the strength of his orgasm, sudden in nature but no less intense. "Fuck, sorry, 'm sorry," he babbles, watching in horror as his cum paints Riku's face, covering his lips and dripping off his chin. "I didn't mean to- it's just it felt- oh god."
But Riku doesn't look mad. He looks- well, incredibly turned on, in fact, swiping his fingers through the mess on his cheek to push Sion's cum between his lips. He moans around his fingers, cheeks pink where he squirms on the bed, his arousal clear from the tent in his own sweatpants. Sion yanks off his t-shirt, helping Riku to take off his own pyjama bottoms and pulling him into his lap. He licks his own cum from Riku's face, fingers trailing over his skin before he kisses him. It's rough and deep and passionate, and Riku whines into it, wiggling in Sion's lap.
"Come here," Sion whispers, pulling Riku closer until their hips are flush, Riku's hard cock rubbing Sion into oversensitivity. He pays it no mind, sliding his hands across Riku's ass over his boxers until he's pressing over his hole through the material. Riku moans, arching his back and pushing his ass into the touch.
"Hyung," he whimpers aimlessly, burying his face in Sion's shoulder to lick and suck at his skin. Sion continues to massage his ass, encouraging him to grind his hips against his soft, messy cock. Riku's breaths are hot against his neck when he moans out a plea. "Let me show you," he breathes, kissing his way up to Sion's ear. "It goes so pink and pretty at the tip. I want you to see."
"Yeah?" Sion says dumbly, Riku's constant dirty talking making his brain feel like it's seeping out of his ears. He should have known Riku would be like this in- in bed. All teasing and cheeky and on a mission to make Sion go as crazy as possible. It's working.
"Yeah," Riku answers. "You've thought about it, haven't you? Don't you want to see the real thing?"
Sion nods, hooking his thumbs in the waistband of Riku's boxers to tug them down over his ass. He helps Riku get fully naked on top of him, his mouth watering as he stares down at his cock. He was telling the truth - his cock is gorgeous, though how could Sion expect anything different from someone like Riku? His tanned complexion gives way to the colour of his blush halfway up the shaft, and Riku's cock twitches against his fingers as he lightly dusts them over the length.
"Shit, Riku-yah," Sion grunts, wrapping his fingers around Riku's cock. "You like looking at your cock, baby? You like watching yourself?"
"Yeah," Riku answers honestly. "I-I sit in front of the mirror and-" He cuts himself off with a gasp when Sion's free hand finds its way back to his ass, stroking up from his perineum to his hole where he circles over it teasingly. Riku moans softly. "Fuck, hyung, do you have lube?"
Sion reaches for his bedside table, wordlessly pulling out a small bottle of the stuff. He drizzles it over Riku's cock, jerking him slowly with two hands for a moment to coat them both. Riku thrusts into his fists, rising on his knees to rock his hips properly. Sion looks up at him in wonder, considering, not for the first time, that he may be dreaming. He doesn't think it's unlikely that he might wake up any moment, underwear wet and lips bitten from the bite of Riku's name, as he's done before so, so many times.
"Hyung, your fingers," Riku pleads, "fu-fuck, I don't wanna come like this."
Sion nods, unable to take his eyes off of the way Riku's face looks contorted in pleasure. Sweat beads at his temples, his brows furrowed and lower lip caught between his teeth. He looks so gorgeous, so sexy, and Sion can feel his spent cock begin to stir despite his recent orgasm.
He reaches back around to Riku's ass, and the younger man lets out a breathy moan as he sinks back down to sit on Sion's lap. He wraps his arms around Sion's neck, rejoining their lips in a searing kiss as he presses his ass back against Sion's hand. Sion lets him lick into his mouth whilst he concentrates on rubbing his lubed finger over his hole, and Riku whimpers when he finally begins to press in. He's so hot inside, tight and wet from the lube, and Sion finds himself wishing he'd had the forethought to bend him over and eat him out first.
"Faster," Riku begs, pulling away from Sion's lips just enough to get the words out. "More, come on, I can take it."
"You- you've done this before," Sion realises, voice cracking. The image of Riku fucking himself on his own fingers, fuck- does he do it in front of the mirror when he jerks off? Does he sit there on the cold wooden floor, naked and flushed as he pistons his fingers inside his tight hole? Does he make himself come like that? Does he-
"Do you think of me?"
Riku laughs breathlessly. "Yeah," he nods, lips quirking. He kisses Sion again. "Yeah, hyung, I'll tell you about it some time."
"Okay," Sion accepts, pushing his finger deeper until his knuckles dent the plush meat of Riku's ass. He swallows Riku's moan, slowly beginning to move his finger in and out. Riku pushes his ass back to meet his thrusts, aiming his hips like he's trying to get Sion to achieve a certain angle. His cock slides through Sion's fist with every motion, Sion's hand completely still and tight just for Riku to take, take, take.
"Crook your finger a little," Riku breathes. "Yeah, fuck! Like that."
He scratches at the back of Sion's neck, lips moving messily across to his jaw. "Another," he pleads. "Yes, Sion-hyung, oh my god-"
Sion doesn't think there's a thing on this earth that Riku could ask for that he wouldn't give him. He pulls back to watch Riku's face for any sign of pain as he presses in another finger alongside the first, wasting no time in thrusting them against his prostate. Riku's mouth drops open, his eyes crossing as he tries to keep his gaze locked with Sion's.
"Fuck, ah, hyung, let- let go," he moans. "I can come untouched, just watch, just keep-"
"Fuck, really?" Sion groans in wonder, dizzily pressing in a third finger. Riku nods, nails biting crescents into Sion's shoulders. "Shit- okay, okay, show hyung," Sion grits out, his erection back with a vengeance where it stands, neglected, against his stomach. He lets go of Riku's cock, squeezing his thigh instead as he fucks his fingers in and out of Riku's tight heat.
Riku's moans get louder and higher and more broken, chest heaving as his cock jerks in midair. It's so flushed it looks almost painful, shining from a mix of the lube and his precum. Sion wants to taste, but he wants to watch Riku come untouched even more.
"Hyung," Riku sobs. "Hyung, hyung, hyung-"
His orgasm hits him as he writhes in Sion's hold, the first wave of cum painting Sion's own cock. He groans, thrusting his fingers in hard, coaxing another spurt of cum from Riku's twitching erection. Riku is a mess of moans and whimpers, doubled over with pleasure as every thrust of Sion's fingers against his prostate draws another splatter of cum against Sion's own cock.
He shakes with the force of it, fingers frantic as they tug at Sion's hair. "Hyung, oh my god," Riku babbles, falling forward until his cock rubs through its own mess on Sion's stomach. "Fuck, I need- I need-"
Sion gasps as Riku wraps his hand around his cock, jerking him hard and fast, his intention clear. "Can I, hyung, please? Just the tip- just- oh fuck-"
Sion nods, crazed, already moments away from coming again. He can only watch as Riku brings his cock to his hole, his fingers slipping free so Riku can push the head of it inside. He clenches hard around it, and Sion groans, his head knocking back painfully against the headboard.
"Fuck," he grunts, hands finding their way to grip hard at Riku's hips. His cock pulses inside him as he releases, and Riku sighs happily, circling his hips to edge it deeper. He pulls off when Sion winces, truly oversensitive, cum dripping down his soft thigh almost immediately.
"Riku-yah," Sion breathes in disbelief. "Holy fuck. I've never known anyone so sexy in my entire life."
Riku collapses down beside him, grinning. He runs his hand through his sweaty hair, pressing his cheek into Sion's bare shoulder. He hooks his leg over Sion's thigh, running his hands down his arm to lace their fingers together.
"You think I'm sexy?" Riku asks, teasing.
"I think you already know what I think," Sion admits, shaking his head, a smile dusting his lips.
Riku giggles, nuzzling against him. They sit in silence for a few moments before Riku speaks.
"Hyung," he whispers. "Can you tell me what this means?"
His voice is raw, more vulnerable than Sion's heard it for a long time. Sion twists against him until they're laying face to face, heads on Sion's pillow.
"You know," Sion starts. "I always pictured doing this somewhere more romantic than this."
Riku flushes, failing to hide his smile. There's no doubt he knows from that sentence what Sion's about to say, and Sion returns his grin, heart hammering in his chest as he begins to realise Riku might just feel the same way.
"Where could be more romantic than in your bed covered in cum?" Riku asks, his finger making Sion's abs clench as he trails it through said cum. He brings it to his lips, and Sion groans, hand gripping his wrist.
"I can't go for a third," he complains. "My dick will fall off."
Riku laughs, wiping his finger on the duvet instead. "Sorry," he says, but he doesn't sound it. "Continue confessing, please."
Sion rolls his eyes, his outstretched hand finding its home on Riku's jaw instead. He swipes his thumb over Riku's cheek, gaze turning heavy. And suddenly, it isn't so funny anymore.
"Do you have any idea what you do to me?" Sion asks. "What you've always done to me?"
Riku gulps, shaking his head. His eyes are big and round and earnest and Sion wants to kiss him.
"You drive me crazy," Sion continues. "I don't want you to look at anyone else the way you look at me."
"Hyung." It's Riku's turn to roll his eyes. "I don't."
"Good," Sion grins. He leans forward, resting their foreheads together. "You're mine."
"Yeah," Riku agrees, pressing a soft kiss to Sion's waiting lips. "And you're mine."
Maybe Sion's only mistake was waiting this long.