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Kiyoomi can hear the filthy slick sounds of lube and slapping skin and breathless gasps the second he enters the apartment. He toes off his shoes and hangs his jacket before making his way to the bedroom. Kiyoomi’s not shocked by the display he finds waiting for him. Atsumu kneeling on the floor at the end of their bed, legs spread wide as he fucks himself open on a thick black dildo.
Atsumu looks up at him, eyes hazy, face flushed, but he doesn’t stop. “Omi. Please.” Kiyoomi has a fleeting thought of leaving him to finish by himself, a punishment for not waiting. Instead he moves closer, winds his fingers into Atsumu’s damp hair and grinds his hardening cock against his open mouth.
“Such a needy whore,” Kiyoomi says, tugging back hard on Atsumu’s hair. “Go on then.” Atsumu’s hands are quick and practiced in response, easing Kiyoomi out of his pants and nosing at his balls. He takes Kiyoomi too deep too fast, spit and tears drip wet down Kiyoomi’s dick. It’s sloppy and desperate.
Kiyoomi keeps a firm hand in Atsumu’s hair as he starts to fuck into the wet clutch of Atsumu’s throat. “Such a slut, aren’t you? Need both your greedy holes filled.”
Atsumu groans, tries to pull off so he can say yes… please but he can’t. Kiyoomi won’t let him. He doesn’t need to hear him say it – he knows. “So desperate for cock you’d let anyone fuck you. Let the whole team use you.”
Atsumu’s hands twitch where they’re gripping hard at his own thighs, nails pressing into the skin. He’s trying so hard not to touch himself, needs it to come but Kiyoomi hasn’t given him permission yet. Atsumu’s obedient when it counts.
Kiyoomi lowers his voice to near a whisper, tilts Atsumu’s head up so he can look right in his eyes. “Bet you’d even let your own baby brother have a go.”
Atsumu freezes and his eyes go wide, a deer in headlights, as he shakes apart completely untouched making a mess of himself. Kiyoomi knew, has known for a while. Maybe Kiyoomi wouldn’t have noticed the hungry looks and lingering touches if he wasn’t just as sick as Atsumu. They really are perfect for each other.
Atsumu’s reaction, the filthy image of Atsumu touching little Osamu, is enough to make him cum. Kiyoomi unloads hot across Atsumu’s tongue. Atsumu swallows automatically but he looks lost, vulnerable and like he might start crying for real. Kiyoomi’s not sorry he said it but he’ll be gentle with him for now. It’ll take some careful planning and gentle coaxing for Atsumu to accept this but he knows it will be worth it.
Kiyoomi hasn’t done this himself in years, not since university when he’d spent a summer helping out at a volleyball training camp for middle schoolers. He’d had his first taste of little boy asshole and promised himself he’d never do it again. Since he met Atsumu’s little brother, it’s been even harder to ignore the urges.
***
Atsumu’s an absolute wreck during training and Kiyoomi can’t bring himself to tease his boyfriend for screwing up yet another set because he feels it too. The nervous anticipation, the sweet promise of a weekend doing things Kiyoomi has rarely let himself fantasize about, mixed with a twist of guilt about how wrong this all is. He wants this though, they both do.
Kiyoomi ushers Atsumu into the bathroom as soon as they get home. They both rinsed off in the showers after training but Kiyoomi runs the bath anyway. They’ve got a few hours to kill before they need to pick Osamu up from the station. Atsumu lets Kiyoomi undress him and manhandle him onto the shower stool while the tub fills. Kiyoomi takes his time washing Atsumu’s hair, scrubbing them both clean. It’s a familiar ritual and helps dissipate some of the nervous energy humming between them.
They move to the bath and Kiyoomi let’s Atsumu settle between his legs, head tilting back to rest on Kiyoomi’s shoulder. It’s a tight fit with the two of them but they manage. Atsumu opens and closes his mouth, fidgets and squirms before he finally gets the words out. “Ya don’t have ta do this for me ya know,” Atsumu mumbles, fingers tracing the veins on Kiyoomi’s hands.
“Of course I don’t, but luckily for you I’m almost as perverted as you are.”
Atsumu huffs, “Almost, huh?”
“Well he’s not my little brother,” Kiyoomi teases.
“Yer the one who wants ta watch us,” Atsumu fires back.
“Mmm I do,” Kiyoomi agrees, sliding a hand up to pinch at Atsumu’s nipple. Atsumu groans and arches into the touch but Kiyoomi is slipping out from behind him before he can take it any further.
“Later,” Kiyoomi says as he leans over to press a kiss to Atsumu’s forehead. Atsumu flops back with a grumble and stretches out to soak.
Kiyoomi’s already dressed and in the kitchen preparing some of their dinner when Atsumu finally climbs out of the bath. Atsumu flicks the TV on and off, checks the guest room is ready three times and gets banned from the kitchen before it’s time to leave. He’s sitting on the couch, jiggling his leg and staring out the window when Kiyoomi finds him.
“You ready to go?” Kiyoomi asks.
“Huh? Yeah. I guess.” Atsumu replies but he doesn’t move.
“We don’t —” Kiyoomi begins.
“No!” Atsumu stops him, whipping around. “I want ta. C'mon let’s go.”
***
Kiyoomi and Atsumu are waiting on the platform but Osamu spots them first. “Tsumu-nii,” he calls out, running towards them, bag bouncing on his back. Atsumu pretends to look around, fake confusion wrinkling his brow.
“That can’t be my little Samu? My brother is small. You’re a foot taller ‘an he was,” Atsumu teases.
“It’s me,” Osamu breathes, cheeks flushed red. “It’s me, your Samu. Your little brother.” Atsumu smiles wide and scoops Osamu up and into his arms. The little boy goes easily, legs coming up to wrap around Atsumu's waist. Atsumu let’s one large hand cradle Osamu’s tiny bottom and Kiyoomi feels a momentary pang of jealousy.
It’s okay though, Kiyoomi can be patient, he has plans. This isn’t the first time he’s coaxed a boy into his bed. Drugging Osamu would be easy but it’d ruin the fun for Kiyoomi. He wants him pliant but aware. Kiyoomi likes it best when they’re curious, when they want to touch and be touched. Luckily for him, Atsumu agrees.
“Let's get home,” Kiyoomi suggests, eager for their special weekend to begin. “I thought we could make some onigiri together for dinner.”
Osamu’s little face lights up. “Really Sakusa-san? Yer the best!”
“Hey!” Atsumu says in mock offense, “What about me? I’m yer big brother.”
“Maybe if ya give me a piggyback ride I might change ma mind.”
Kiyoomi laughs loud and genuine, ruffling Osamu’s hair, desperate to touch. Osamu’s cheeky, bolder since the last time he saw them a few months ago. Kiyoomi can’t wait to have him.
The walk back to the apartment goes quickly. Osamu chatters the whole way home in an endless stream about school and his junior volleyball team and cooking club and how he loves both but he’s not sure if he wants to be a volleyball player like Tsumu or if he wants to be a chef. Osamu barely pauses long enough for either of them to respond but he doesn’t seem to really expect a response anyway, happy just to share all the parts that make up his little world.
Kiyoomi leaves Atsumu to help his brother settle in while he sets up the little onigiri station he has planned for dinner. Rice, fillings and sides are all ready to go on the bench when Atsumu and Osamu make their way to the kitchen. Osamu lets out the most adorable squeak and rushes right at Kiyoomi, throwing his arms around his waist and squeezing tight. Kiyoomi’s belly swoops at the warm press of Osamu’s little body against his front.
“Ya really made this for me?” Osamu beams. “Sakusa-san already did so much work, lemme make the onigiri. Give me ya order and I’ll make it like a real chef!”
“You choose Osamu, we’ll have the chef’s special tonight,” Kiyoomi grins. Osamu giggles and rushes off to wash his hands.
Kiyoomi slides a hand across Atsumu’s hip and pulls him close. He leans in and presses their lips together teasingly soft before he licks into Atsumu’s mouth right there in the kitchen. Atsumu’s hazy and pliant but Kiyoomi is aware. He watches Osamu scurry past them, cheeks red and eyes darting, trying not to look but too curious to really stop. They’ve never done anything like this in front of him before. His reaction is cute and Kiyoomi feels hopeful, wonders if Osamu knows he likes kissing other boys yet or if they’ll be the ones that make him that way.
Kiyoomi ushers Atsumu into the living room, and turns on some volleyball game highlights on the sports channel. He keeps his boyfriend close, curled against his side, fingers combing through bleach blonde hair. He’s listening though, not to the TV but to the sounds from the kitchen. Osamu mutters and hums to himself while he cooks and Kiyoomi finds it just as endearing as Atsumu’s off-key shower singing.
Osamu starts to ferry all the dishes to the table and calls out for them to come and eat. He beams proudly as he describes each creation. Some sound better than others but they try them all. “Yer not a bad chef after all,” Atsumu says, leaning back to pat at his full tummy.
“Did ya like it Sakusa-san?” Osamu asks.
“Delicious!” Kiyoomi watches Osamu’s cheeks and ears pink up again at the compliment.
Osamu stands to clear the empty dishes but Kiyoomi stops him. “If we both cooked, your brother’s on clean up duty.” Atsumu grumbles a little but starts to move.
“You should get cleaned up Osamu. The bath will still be warm, if your brother put the cover on.” Kiyoomi tells him. Osamu follows Kiyoomi down the hall and collects his things for a shower. He sets them on the counter before looking shyly at Kiyoomi. “Just call out if you need anything.” Kiyoomi leaves him alone in the bathroom for now.
He waits until he hears the shower shut off and then re-enters the bathroom, the fluffy baby blue towel he conveniently forgot in his hands. Kiyoomi gets his first look at his boyfriend’s naked baby brother and his cock lurches. Osamu is beautiful — smooth pale skin, tiny pink nipples and a perfect little mouthful between his legs. He covers himself demurely at the intrusion but Kiyoomi reassures him, “We’re all boys here Osamu, don’t worry.”
Osamu lets his hand fall away as he makes his way to the bathtub. “I forgot your towel.” Kiyoomi says by way of explanation but he makes no move to leave just yet. He’s visibly hard in his pants and he wonders if Osamu can tell, if he knows what it means. Kiyoomi watches Osamu climb into the bath. “Take as long as you like,” he says before finally tearing himself away.
Atsumu’s settled back on the couch when Kiyoomi returns. His boyfriend raises an eyebrow when he notices Kiyoomi’s current condition. “Been spyin’ on little boys in the bath ya perv?”
“You jealous?” Kiyoomi counters. Atsumu pulls Kiyoomi down on top of him, legs slotting together, chasing friction with his hips. They kiss and rut lazily on the couch, it’s not quite enough for either of them but it feels good.
“Tell me,” Atsumu gasps between kisses. Kiyoomi knows exactly what he wants.
“He’s so tiny and smooth all over. Prettiest little dick I’ve ever seen,” Kiyoomi breathes it against Atsumu’s mouth like a secret. “Probably never even cum yet. Think you can suck his first orgasm out of him?”
“Yes,” Atsumu moans, too loud really if they were trying to keep things proper. Kiyoomi hopes Osamu hears it. They keep going, writhing like teenagers on the couch. He brings Atsumu to the edge over and over until he can hear Osamu’s quiet feet padding down the hall. Kiyoomi works him up again, sucking marks along his throat so Atsumu’s moans spill unhindered from his mouth.
He brings his lips to Atsumu’s ear, “Don’t you dare cum.” Atsumu whimpers in response, so close to the edge and desperate to finally let go. But he doesn’t. Kiyoomi’s pleased when Osamu enters the living room, he can definitely hear them and yet he doesn’t shy away. He watches them for a bit before making a little noise, like he’s trying to alert them to his presence. Like they both don’t know that he’s there, and aren't getting off on him seeing them. Like this isn’t exactly what they’d intended.
Atsumu makes a big show of apologizing, even offers to let Osamu choose the movie, something he’d never usually relent on. Osamu scrolls and stops on something his ma would never let him watch. “This one. Please Tsumu-nii,” he begs.
“Ya better not have any nightmares,” Atsumu warns. Kiyoomi thinks it wouldn’t be the worst thing though, Osamu coming into their bed, scared and wanting to cuddle.
“I won’t. Promise!”
Halfway through the movie, Osamu curls up against his big brother. Atsumu tucks him closer under his arm and Osamu burrows in, rubbing his face against Atsumu’s chest before turning back to pay attention to the movie. Kiyoomi watches Atsumu touch him, slow strokes along Osamu’s side, over and over. Osamu’s fingers twitch, his eyes flicking up to look at his brother every few seconds as his breathing gets heavier. Kiyoomi’s a little surprised at how tactile Osamu seems, how easily he responds to the simplest touch. Until he realizes that Atsumu’s managing to rub at his little nipple on every other slide. Kiyoomi would think Atsumu’s not even aware if it weren’t for the way his eyes are unnaturally focused on the screen, his lip pulled up in the barest hint of a smirk.
Osamu’s near panting, open mouth leaving a damp little patch on Atsumu’s shirt. His hand slowly snakes down to tuck between his legs and press against himself. They’re both enjoying watching him squirm but Kiyoomi knows they can’t push too far yet. He leans into Atsumu’s ear and whispers, “That’s enough.”
Atsumu gives one final stroke before shifting his hand to rub Osamu’s arm and shoulder instead. Osamu calms quickly, lulled to sleep by the rhythmic strokes. He’s snoring softly by the end of the movie.
Kiyoomi cleans up while Astumu carries a sleeping Osamu to the guest room. Atsumu drags Kiyoomi straight to bed and he understands. They’ve both been riding the knife's edge of arousal for so long it’s almost painful. Atsumu pushes him into the mattress and turns to shut the door. “Leave it open,” Kiyoomi instructs, pulling his own shirt over his head.
Atsumu’s naked and fishing out a bottle of lube from the bedside drawer before he can get his own pants off. Kiyoomi scoots up the bed and settles with his back against the headboard. His boyfriend wastes no time straddling his thighs and working a slick finger into his own hole. Kiyoomi strokes himself slow, thumbs at the sticky head while Atsumu pries himself open just enough to take him.
Atsumu smears the lube still clinging to his fingers down Kiyoomi’s cock before pressing the blunt head against his barely open hole. It’s so suffocatingly tight that the pressure keeps Kiyoomi from coming the second he finally gets his dick in something warm and wet. He’s not usually on such a hair trigger but seeing Osamu in the bath, having him panting and squirming and knowing it’s because his brother is touching him. It’s the filthiest wet dream come to life.
Atsumu rocks his hips, works himself open on the thick fuck of Kiyoomi’s cock. He’s loud, groaning and gasping with no care for his little brother sleeping down the hall. Kiyoomi hopes he’ll wake up. Atsumu has to stop and catch his breath once he’s finally managed to seat himself. Kiyoomi doesn’t wait, can’t. He grabs Atsumu’s tight little waist and grinds in even deeper.
Atsumu lets out a shaky breath, “Fuck — can ya give me a sec?”
Kiyoomi barely pulls out before he’s shoving back inside, fighting Atsumu’s body for every inch it will give him. “Come on baby, let me in this sweet little cunt.”
Atsumu sobs and finally relaxes enough inside to really take it, to let Kiyoomi use his body exactly the way he wants. It’s so fucking good. Atsumu’s beautiful like this, tears clinging to his dark lashes, no trace of the cocky smile he hides behind. He’s so vulnerable and honest, in a way he isn’t anywhere else.
Kiyoomi notices him first. A little head peeking around the doorway, sleepy eyes blowing wide as he watches his big brother get split open by cock. Kiyoomi’s not sure if the noise or bad dreams have woken him but either way he’s there. It’s all playing out even better than Kiyoomi dared to hope.
He pulls Atsumu in to fuck his tongue into his mouth as rough as he’s fucking his hole. Kiyoomi’s sure it gives Osamu an even better view. He grips Atsumu’s ass and tugs him forward, letting his dick slip out of the warm hole. His palms spread to keep Atsumu exposed, gaping and empty. Kiyoomi whispers just loud enough for Atsumu to hear, “We have an audience. You want to show him what a good little slut you are?”
“Yes… please,” Atsumu whines.
“Turn around then. Put on a show for your little brother.”
Atsumu’s already moving. So fucking eager — for cock, to be a good boy, to show his brother how easy he can take it, how much he likes it. He turns and sinks right back down, guts himself on Kiyoomi’s fat dick. Atsumu’s not looking at his brother yet, head tipped back as he works his hips in filthy circles. It feels like fucking magic on Kiyoomi’s dick. That and the fact that Osamu’s still there, still looking, has him ready to pop. Kiyoomi watches Osamu shift, like maybe he wants to get even closer. Instead he cups the little tent in his pajama bottoms and squeezes.
Kiyoomi can’t take it anymore. He pushes Atsumu forward onto his hands and knees and threads his fingers through his hair. He yanks Atsumu’s head back right as he pushes into his ruined hole, forcing Atsumu to look at his little brother. Atsumu clutches up hard, whole body going taut as he makes a mess all over the sheets without a hand on his dick. Kiyoomi lets Atsumu’s spasming hole pull the cum right out of him.
Kiyoomi lets go and Atsumu falls forward, no longer forced to stare right at his brother while he’s getting fucked. It snaps Osamu out of whatever curious little trance had him frozen in place and he disappears back down the hall to his room.
“Yer a fucking bastard, ya know that?” Atsumu groans.
“Shut up. You loved it.” Kiyoomi knows he did. They both did, and if it’s this good with Osamu just watching them, he can’t even imagine what it’ll be like when they finally get to have him.
***
Osamu’s a little shy at breakfast the next morning. Kiyoomi catches him staring at the soft bulge in his sleep pants more than once but he seems to be relatively back to normal by the time they’re ready to head out for the day. He happily holds both their hands as they walk through the amusement park together and doesn’t protest when Atsumu insists Osamu sit on his lap when they eat lunch in the busy food court. Kiyoomi gets his own little treat when Osamu asks him for a piggyback ride on the way home, tired from their long day out. It all makes Kiyoomi sure. “Tonight,” he says, and Atsumu nods, knowing exactly what he means.
They don’t put a movie on after dinner, instead Atsumu coaxes a sleepy Osamu into the bathroom to bathe with them. Osamu watches first as Kiyoomi washes Atsumu before he’s pulled into the vee of Atsumu’s thighs where he sits on the shower stool. He lets Atsumu clean him, rubbing the washcloth across his chest and down his arms, over his belly and legs. Atsumu saves the best bits till last, Kiyoomi would have done the same. He cups his brother’s smooth pink sac and massages gently, grazing a soapy finger over his tiny asshole. Osamu hums at the touch, baby dick plumping up at the feel of someone else touching him there.
Kiyoomi’s finding it hard to blink, to tear his eyes away for even a second and miss something. He has a distant thought that they should film him but that seems like unnecessary risk. Atsumu circles two fingers around Osamu’s developing dick, stroking in a soapy handjob under the guise of helping his brother bathe. His little prick pokes straight out, head just beginning to peek out of the foreskin. Atsumu thumbs at his slit and Osamu jerks away. “Tsumu?”
“S’okay, just gotta push this down, make sure yer all clean okay?” Atsumu must know that this isn’t really necessary but Kiyoomi’s just as eager, wonders if Osamu’s big enough for it to even comfortably retract yet, if he’s ever done it before.
Osamu nods and Atsumu works the delicate skin back from the tip as gently as he can.
“H — Hurts.” Osamu whines, but he doesn’t try to move.
“Feels kinda funny at first but you’ll get used to it,” Kiyoomi says, squeezing the base of Osamu’s neck in reassurance. It doesn’t look like there’s any resistance so Kiyoomi’s not worried about actually hurting him. Atsumu mustn't be either because he doesn’t stop until the skin makes it over the widest part and nestles behind the flushed tip.
“There you go. All grown up!” Atsumu says and Osamu beams. He’s a little more awake after the ordeal but Kiyoomi’s not concerned. They skip the bath tonight, too eager to really relax. Osamu trails along like a little puppy, following Atsumu into their bedroom wrapped in only a towel. Kiyoomi’s not sure what Osamu thinks is happening, but he seems willing enough so far.
Kiyoomi’s done taking things slow, wants to get things going before Osamu can change his mind. He lets his own towel fall before he coaxes Osamu’s away. Kiyoomi pulls him onto the bed and between the vee of his thighs, Osamu’s back pressed to his chest. Atsumu follows, kneeling in front of Osamu. “Ya kissed anyone before ‘Samu?” Atsumu asks. His little brother shakes his head. Atsumu looks pleased and Kiyoomi agrees, wants to be a part of every one of this beautiful boy’s firsts.
“Want me to kiss ya?”
Osamu nods, blush creeping up his cheeks and coloring the tips of his ears. Kiyoomi can’t believe how easy he is. He’s never had one be this eager before, and here Osamu is asking to be kissed by his big brother. Kiyoomi watches as Atsumu presses his lips far more gently than Kiyoomi would have managed, barely enough pressure for Osamu to feel him at all. He opens his mouth for big boy kisses and Atsumu rewards him by working their tongues together until Osamu is gasping for air.
Kiyoomi tilts Osamu’s head up and licks his boyfriend’s spit from his little brother’s mouth. Osamu’s baby dick is starting to chub up already, his body knows what it wants. “Want me to put my mouth here too?” Atsumu asks, rubbing his thumb against the side of his brother’s little hardon. Osamu doesn’t answer but he presses into the touch. Kiyoomi slides his hands under Osamu’s knees and lifts him, spreads him open so Atsumu can taste every perfect pink part of him.
Atsumu kisses at his little brother’s dick, noses the tight smooth sac before taking the tip in his mouth and running his tongue around the head. Osamu squirms in Kiyoomi’s hold but the hands keep him spread wide. “Just let your big brother take care of you. It’ll feel good. Promise.”
Atsumu laps at Osamu’s pretty little dick until he’s panting before he finally closes his mouth around it. Osamu keens, “Tsumu-niiiii.” Atsumu smiles around his tiny mouthful and then opens his mouth even wider and sucks his brother’s sac in too. Osamu wails and Kiyoomi considers letting go of one of his legs to clamp a hand over his mouth. He kisses him instead as Atsumu works him over. Kiyoomi is hard and leaking against Osamu’s back, every squirm is a teasing pressure against his own cock.
“You’re doing so good, beautiful boy. Just let go.” Kiyoomi can tell he’s on the edge, so close to cuming, if he only knew how. Atsumu reaches a hand up to rub at his brother’s sensitive little nipples and it’s enough. Osamu sobs, shakes apart in his big brother’s mouth and in Kiyoomi’s arms. He’s an absolute wreck when Atsumu finally lets his soft baby parts slip out. Kiyoomi eases him down on the bed and his legs relax, body slumping.
Kiyoomi knows Atsumu is made from the same sick parts that he is because his boyfriend leans straight in to share the filthy secret taste of underage dick. “Did he?” Kiyoomi doubts Osamu can actually ejaculate yet but he’s still curious.
“Na, maybe next time,” Atsumu says, and it’s the best fucking thing Kiyoomi has ever heard. Next time. Atsumu wants to do this again, wants to keep on fucking his little brother with him. Kiyoomi just might marry him.
Osamu’s fucked out little body is easy to shift. They leave him there against the pillows while Kiyoomi works Atsumu open on his tongue. Kiyoomi thought Osamu might fall asleep, that they might have to finish without him this time but he perks up once Atsumu starts begging for dick. Kiyoomi fucks him slow and deep, drawing it out for himself because he’s a little bit of a masochist. Only letting himself cum once Osamu is hard, flushed pink all over and panting hard like he’s the one that’s being fucked.
Kiyoomi empties himself deep inside of his boyfriend while his little brother watches for the second time. Atsumu isn’t allowed to cum yet though, not when Osamu is hard again and Atsumu has a hole ready to be used.
“You want to make him feel good too?” Kiyoomi asks and Osamu nods. Kiyoomi manhandles Atsumu until he’s on his knees, chest pressed to the bed. He forces Atsumu’s legs wide and pushes his ass down low so Osamu can reach his hole.
Osamu pushes his hard little cocklet into his big brother’s sloppy ruined hole and it’s a beautiful sight. Osamu makes the sweetest huff, grunt, moans as he pumps his hips and fucks into his brother. Atsumu is crying. He wants this so badly, to be used by his brother but Kiyoomi can tell it’s not enough with the way he’s rocking back desperately. Osamu’s underdeveloped dick is like a finger teasing just inside his rim. Kiyoomi lets Osamu rut until he’s shaking with his own little orgasm before he helps.
“You're not big enough for your brother yet,” Kiyoomi tells him, “You’ll have to use your hand.”
Kiyoomi takes Osamu’s hand in his and folds his fingers into his palm. “Just push in like this and it’ll feel like a nice big dick,” Kiyoomi instructs.
“Like yours?” Osamu says and fuck, this kid is perfect.
“Yeah, like mine.”
Kiyoomi coaches Osamu through pushing all his fingers past his big brother’s stretched rim. He keeps a hand on his elbow, guiding Osamu’s arm into a rhythm until his whole hand is inside and he’s punching into Atsumu’s guts up to his elbow. Osamu stops, brow furrowing and Kiyoomi asks, “You okay?”
“I can feel — it feels weird,” Osamu says, nose scrunching up.
Kiyoomi laughs, “Weird how? Can you feel his heartbeat?”
“So cool!” Osamu whispers, and Kiyoomi laughs again but Atsumu’s done waiting. He pushes back onto his little brother’s hand like the needy whore he is.
“You’re doing so good. He’s nearly there. Are you ready?”
“Yeah,” Osamu pants, starting to push in again. His breath coming harder and harder as he fucks his big brother.
“Push in as far as you can and then pull down,” Kiyoomi tells him. Osamu does. He fills his big brother’s ass so full Atsumu finally cums from the blinding pressure on his prostate.
Kiyoomi helps Osamu ease his arm out of his brother and places a kiss on each of his filthy little fingers. Atsumu pulls Osamu towards him and snuggles in close. He leaves them to share a private moment, just the two of them and goes to rinse himself off. He shoos them out of the bedroom when he returns. “Go wash up, I’ll change the sheets.”
Atsumu leads Osamu to the bathroom again, while Kiyoomi makes the bed. Osamu pauses in the hall after their shower, looking towards the guest room, his room. Kiyoomi can hear him ask, “Tsumu-nii, can I sleep with you?” Kiyoomi and Atsumu share a knowing look.
“Course ya can. Whenever ya want.”
Osamu curls in between them like a sleepy puppy. Kiyoomi falls asleep thinking about Osamu’s next visit — they might need to make these trips a more regular thing, he can’t wait another month to see him again. Kiyoomi doesn’t think Atsumu will want to wait either.