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“Aniki…” Yushi’s voice is soft like always. Scared of himself, of their parents, of the dark. “Can I…”
“Yeah, ‘course,” Riku breathes, barely above a whisper. Yushi’s hands dart under his shirt like always, cold against Riku’s warm skin. He trails his nails up Riku’s ribs, thumbs at a nipple. Yushi rocks into him when Riku flinches, already chubbed just from leaning over him.
It’s common for Yushi to be hard like this. More often than not, Yushi gets Riku off before they head to sleep, doesn’t get himself off at all. He just likes taking Riku apart, for whatever reason.
It’s not normal for brothers to be like this, but Riku lost any semblance of sanity long, long ago. Anybody would if Yushi were their baby brother, on his knees and begging like he does. Riku can’t be held accountable for that.
—
Yushi was an accident.
They don’t talk about it, really. But Riku’s mother had barely recovered from having Riku when she’d found out she was pregnant again, and it had nearly killed her. Yushi was born several months early, much smaller than was healthy, and hadn’t even been expected to live.
And yet, he had. Riku and Yushi are just barely nine months apart in age. They were raised almost like twins, and sometimes it felt like they were. Riku often seems younger than he is. Yushi often seems a little older. Maybe the world meant for them to be twins, or something. They’ve already been inseparable their entire lives.
Absurdly inseparable. It’s been a running joke amongst the adults that Yushi loves his older brother more than he should. As young children, Yushi had refused to make friends other than Riku. He’d threatened any friends Riku made on his own until they eventually left. He’d “tripped” a girl down the stairs in middle school when she’d asked for Yushi’s advice on confessing to Riku. She hadn’t known that Yushi was the only one ever allowed to kiss Riku, to touch and squeeze and bruise Riku however he wanted. No woman ever needed to do that. Yushi would always be more than enough.
Or something. These are things Yushi has whispered in Riku’s ear as he slides fingers inside of him. Or things he’s confessed right as he’s sliding himself inside, sworn secrets under his breath about how tight Riku is, how perfect he’s always been. Just for Yushi. Riku kind of forgets to turn his brain on enough to listen, most of the time.
He doesn’t mind, though. Their parents have never figured it out, so why would anyone else? And honestly, how would they? Despite the shared blood, Yushi and Riku don’t actually look that much alike. Yushi looks like their father and Riku looks like their mother. Nobody can ever tell they’re brothers at first glance. They’re mistaken for a couple more often than not, which makes Yushi flush without fail.
Yushi likes being mistaken for a couple. Riku just likes Yushi. It’s fine, really. It would be cool to have a big group of friends to hang out with, Riku thinks sometimes. He’d like to introduce Yushi to his best friends, or play games he always sees in movies, or hang out at the movies. But at the end of the day, all Riku really needs is Yushi, and all Yushi needs is Riku. They’ve always been there for one another, and always will be.
They’re fine.
—
Riku can’t even remember when they started sleeping together. He’s had Yushi inside of him more times than he’s written his own name, probably. They’ve never done it the other way around; Yushi likes seeing Riku fall apart way too much to ever let him, no matter how much Riku might want to be inside him for once. Riku doesn’t really want to. He likes letting go, likes having somebody else make the decisions. He’s supposed to be the older one, the leader and role model, but he never really was. It’s always been Yushi. Yushi has always liked thinking. Riku’s more than happy to let him.
It hadn’t started as sex, probably. Yushi’s always been curious, too. Especially about Riku, as if there were possibly some other secret to uncover. As if Yushi isn’t Riku’s biggest secret of all. It had probably been Yushi sneaking hands under Riku’s shirt when he was cold, stealing blankets and shirts until they were pressed close. Too close. Riku was so young, he couldn’t control the way his body reacted to somebody pressed against him. It didn’t matter at all that it was his baby brother’s ass pressed into his cock, Riku was hardening anyway. Yushi had frozen, maybe, scared for a second. And then he’d rolled his hips and pressed Riku’s back into the wall and ground down into him until Riku had come in his pants. Yushi wasn’t even able to get hard yet, Riku doesn’t think. It’s hard to remember, now.
Yushi had kissed him for the first time on his thirteenth birthday, after however long they’d spent touching and groping and exploring. But kissing was new, was something they could never come back from. Riku felt exactly one dip of guilt, a burning hot, nauseating feeling in his stomach. He’d never felt it again, not even as he shoved his tongue down Yushi’s throat.
—
“Rikkun,” Yushi moans softly into his mouth. Riku’s legs are wrapped around his waist, pressing Yushi against him like their lives depend on it. Yushi’s still mostly clothed, zipper down but pants still on. Riku’s down to his underwear. “Aniki, can you—“
Riku hums, not even letting him finish. Of course he can. He can do whatever Yushi asks, no problem. There’s not much they haven’t done, at this point.
Yushi fumbles with his pants, struggling to get himself out with Riku wrapped around him. Riku doesn’t want to move. He wants Yushi inside, so far inside they’re not sure where one begins and the other starts. They were made from the same blood, so surely they fit together better than anyone else.
Yushi holds him gently by the chin, pulling Riku’s face closer and closer to his cock. Oh. Riku can do this, absolutely.
Riku slides to the floor, the cold from the closet’s tile seeping into Riku’s skin. It’s muscle memory, the way that Riku’s mouth finds Yushi’s skin, the way his tongue wraps around Yushi so easily. Yushi has always tasted good to Riku, hot and firm and familiar. Riku’s dick is bigger, but that’s never mattered to either of them. They both know Riku will never have a reason to use it.
Riku doesn’t stay down there for very long before Yushi pulls him off by the hair. The pain smarts for a moment before fading into something more pleasurable, more delicious. Riku blinks up at him, hazy-eyed. Yushi’s gaze is dark, heavy, something beautiful that Riku will never get tired of. And then he’s pulling Riku up and onto the gym mats, a three-foot-high pile in the closet’s corner.
Yushi’s fingers are slipping into Riku’s underwear with expert precision, dragging along the back of his thigh as Yushi slowly slides them off. Riku is already leaking, wet fabric leaving a cold trail down his legs. Yushi mouths at his stomach, his thighs, his ass. He presses a kiss to Riku’s hole before pressing fingers against it, slipping in with ease. Riku is still raw and leaking from this morning, when Yushi was inside him before school.
Yushi hums happily. “Ah…your body still remembers me…”
Riku whimpers, throbbing. His dick aches, having come once already today as well as the day before. But Yushi’s never taken no for an answer, not that Riku has ever wanted to say it. His body has only ever known Yushi, will forever only know Yushi. One day, when they’re grown, they’ll move to Okinawa and buy a house and pretend to be married instead of brothers and nobody will ever know. Just the thought makes Riku’s chest hurt with want.
Yushi slides into him quickly, a familiar comfort. There’s commotion outside, meaning this period’s gym class has just ended and students will be putting things away soon enough. Riku can feel Yushi’s dick throb with recognition, and Riku wraps his ankles behind Yushi’s hips.
It probably won’t take long; they don’t have the time, and Yushi clearly just needs a release. He gets desperate like this, grabby and intense and almost careless. Riku loves it, loves everything about him, loves having any sex with him. Riku licks into Yushi’s mouth, panting and whining softly. Yushi mumbles how much he likes Riku’s voice, his moans, his waist, his everything.
Riku’s body heats from the praise, always weak to Yushi’s words. Yushi’s hand is around him, stroking rapidly as he sucks a new bruise into Riku’s neck. Riku’s classmates always have something to say about it, thinking Riku has somebody new every night, and Riku always chubs up knowing that they’re wrong.
Somebody pulls on the closet, rattling the doors. Yushi fucks in faster, Riku gasping. They can hear the students outside, mumbling amongst themselves.
”Seriously? It’s locked again?”
”Don’t you hear it…somebody’s fucking in here again.”
A few bursts of laughter, mostly female.
”God, do you think it’s the Maeda brothers? Don’t they have this gym period too?”
”Eww!”
”No way!”
”Do you think they actually—“
”Yes! I saw them leave from the same closet once! And Riku-senpai’s necktie was on wrong!”
Yushi squeezes Riku’s dick, making Riku moan out loud. Riku slaps a hand over his mouth immediately, but he’s too slow.
The voices outside are pointedly silent for a moment.
”Oh my god. That really did sound like him.”
”Wish he would make me moan like that…”
”Don’t say that, Yushi-kun will kill you. He’s super protective of Riku-senpai.”
”Okay well Yushi-kun isn’t here, is he?”
Yushi huffs a laugh, squeezing Riku’s waist as he comes. Riku follows immediately after, vision blurring with the sensation of Yushi filling him once again.
Yushi presses fingers against his hole once again, trying to shove as much of his release into Riku as he can. Riku shudders, heating. He loves this, loves feeling full of his baby brother in any way that he can. Yushi swipes the rest of Riku’s come with his other hand, raising it to Riku’s mouth. Riku obediently licks it off, leaving Yushi clean and fresh. Yushi kisses his forehead in thanks.
Within moments, Yushi is dressed again, only sign of his activities being slightly damp hair. Riku sits up slowly, feeling the come drip out of him. They still don’t have a plug, no matter how often Yushi brings it up, so Riku just has to slowly leak for the rest of the day. Their uniform pants are black, so it’s not usually an issue. Riku relishes in the feeling every time.
Riku knows he looks wrecked, he always does. His clothes are always rumpled no matter what, and he sweats so much that sometimes his hair is dripping. Somebody yanks on the door again before loudly saying they’re giving up and using the other closet. Riku’s belt is missing.
”Aniki,” Yushi speaks softly, but still loud enough to be heard if anybody were to walk by. “After dinner…wanna stay with you tonight.”
Riku nods, grinning. This, too, is normal, even though they have their own rooms. Riku doesn’t mind at all. He’s always been lenient to his little brother’s wishes.