Chapter Text
Ordinarily, three friends sharing an apartment isn’t abnormal. When these three friends consist of a couple and their shared friend, Osamu, who consistently forgets to knock, that’s when things can get messy.
Suna is on top of you, eyes hazy and drunk on lust as he watches your face contort. He’s wearing a loose smug grin as he breathes heavily, lips red and agitated from your teeth tugging on them. You moan out his name, his hand pushing your thigh, pressing it to your chest as he sinks deep in you before ripping his hips away only to push right back in.
“You feel so fucking good, Baby. Look so pretty all fucked up.” his murmur reaches you just in time before you toss your head back, baring your neck to him as he chuckles before licking up the column to your throat. He speeds up, your moans sure to get a complaint from the neighbors as he bites and sucks on your neck.
“Oi,” the door opens, Osamu and his deadpan face appear behind it, face not changing as he takes in the scene and says your name, “where’d ya put the damn foil?”
You groan, hands flying up to hold onto Suna’s shoulders as his pace continues, pointedly ignoring his friend to instead ram inside of you. “Cabinet. Next to the plates.” Suna grunts, hitching your other leg on his hip as you whimper under him.
“The hell is it doing in a cabinet?”
To Osamu’s credit, this does happen more often than it probably should, to the point that it no longer causes embarrassment. The first couple times the door would be closed and apologies would be given, then he started to just stand there until being acknowledged, and finally you’ve gotten to the point of speaking through the sex. Regularly, you and Suna will finish after he comes in, sometimes during.
Such as now.
“Dunno, I don’t use the shit.” the next thrust was hard, the environment not working in your favor and instead only increasing your pleasure as you moan and whine Suna’s name, back arching as you cum around him and he keeps fucking you. Osamu calls your name as you hook your arm around Suna’s neck, mouths meeting in messy, sloppy, repeating kisses that make him cum in you.
“Couldn’t fit it-” you whisper, lips pulling from Suna’s before he crashes his back into yours, “Couldn’t fit in the drawer.” you gasp Suna’s name as he thrusts one last time into you, hard and solid before pulling out and chuckling into your neck where he licks and nips at the skin. As you and Suna catch your breath, chests both heaving, meanwhile Osamu stands grumpily at the door due to his kitchen being rearranged. “The new organizer for the silverware is bigger so it couldn’t fit there and the other drawers are all too full.”
Osamu grumbles, nodding in understanding before turning to return to the kitchen. Your bedroom is silent after as Suna hands you a water bottle and cleans you both with a towel. In all honesty, none of you have ever discussed this routine. You’d never told anyone else about it let alone talk about why it keeps happening, why Suna keeps going or why you always clench on him harder. You know Suna and he knows you, the unspoken agreement that whatever this is, is good. It makes you both feel good, and if Osamu was uncomfortable he’d stop or tell you guys off.
Only a handful of days later and the three of you were at Onigiri Miya. Suna had just left practice while you had just gotten off work, both walking to Osamu’s little shop to keep him company during the last two hours of his shift. The free food is a plus, on special occasions an old friend from high school will stop by to eat while other times like tonight, Atsumu will come in pouting.
“Omi ain’t-”
“Ain’t fucking here so shut yer yap ‘bout him.” Osamu glares at his brother who exchanges a similar look before smirking.
“Just admit it. Yer lonely, Dear Brother.” slinging his arm around you, Atsumu gestures between you and Suna, “Can’t imagine how tough it must be on ya, living with a smitten couple while yer oh so so so alone.” You raise a brow and glance between the brothers, only looking away when Suna’s phone rings and he stands to take it outside, kissing you before he leaves. “See, this is what I’m talking ‘bout!” Atsumu laughs before mock pouting at his brother, expression quickly replaced with a repulsed grimace, “Unless you’ve been sleeping around, which I dun wanna know about.”
“We don’t make you uncomfortable do we, Osamu?” you ask, sipping from your drink as you raise a brow at him. He shakes his head, glaring at his brother before rolling his eyes.
“I’d say somethin’ if ya did.” he says with a frown.
“So yer happy being a third wheel?” Atsumu laughs, pointing towards you, “Ain’t you scared of comin’ in while they’re fuckin’ or something.” You and Osamu make eye contact, your cheeks heating involuntarily as he gives Atsumu a disgusted look. Atsumu ignores his brother's glower, instead choosing to focus in on you as you shy away and look towards the door for Suna, hoping he’d come in soon. Atsumu says your name and catches your hand so that your gaze deviates to him, “Has this asshat walked in on ya guys?”
You open your mouth to speak but you end up just sitting there with a slack jaw, glancing to Osamu for help. He's no better off than you, out of the three of you Suna is the only one capable of lying without being found out.
“What’s up?” Suna is back, both you and Osamu look at him in sync as Atsumu stumbles over his words to get them out before the two of you can rope him into lying.
“Has Samu walked in on you guys having sex?”
“Yeah?” Osamu face palms, you cover your mouth and close your eyes as you feel the heat in your cheeks spread to your ears. Suna, the only one who could’ve successfully lied and gotten out of that embarrassing situation, admitted it with zero hesitation. Atsumu’s cackling only makes your cheeks warm more, Suna’s arm wraps around your shoulders as he sits, welcoming you to his side which you cave into easily, hiding your face in the shoulder of his jacket.
“Why are you guys fuckin’ with him there?” Atsumu asks through tears as Osamu rounds the counter to Suna’s other side, growling at him in slight embarrassment.
Suna shrugs, apparently deciding today is the day to stop lying, “We’re horny?” you let out a whine, a warning telling him to keep his mouth shut meanwhile Osamu slaps Suna’s arm with a similar warning. Atsumu slaps some bills on the counter, standing before wrapping his arms around Osamu and Suna’s shoulders.
“Didn’t expect ya’ll to be such freaks. Omi doesn’t let me touch ‘em with people around.”
“How far off is your place?” Osamu’s question gets a groan out of his brother.
“Way too far. Is yer couch empty or do ya guys have sex there too so Samu can have easy viewing?” Suna chuckles and you frown up at him while Osamu shoves his brother off his shoulder and stalks to the kitchen. Decidedly not dignifying Atsumu with an answer, Osamu is long gone by the time you stand from Suna’s side.
“Gonna help him close. Switch the sign when you leave, Sumu.” Atsumu sighs, arm still around Suna pulling him in so Suna turns to look at him.
“Have you fucked my brother?”
“Do you really wanna know the answer to that?”
Atsumu sucks in a breath, squinting at Suna before holding up his hands in surrender. “Can’t believe my brother is in a throuple.”
The walk home is silent, your cheeks are still warm as your mind races with what group conversations will look like from now on. Never before had any of you acknowledged the situation let alone talked about it so freely. Though Suna didn’t mention how often the walk-ins happen or how you’ll keep going through them, you doubt Atsumu will hesitate to bring it up around others which may become conversations about what really happens. Atsumu is a smart guy. He may act dumb but he’s good at reading people and given his friendship with you and Suna and his shared blood with Osamu, you figure it isn’t long until this situation that has been looming over you will come to light sooner rather than later. Once home, the door is opened and it's silent as you all take off your jackets and hang them up. Osamu walks into the kitchen to grab a water bottle as Suna sits on the couch and pats the spot next to him for you to join. You stay standing though, bridging the gap between kitchen and living room as you look between both rooms.
“Baby,” voice gentle and smile just as soft to match, Suna gestures for you to come closer and you do. Glancing over your shoulder as Osamu stalks out the kitchen, eyes lingering on you and Suna as you sit next to him on the couch. As you lean into your boyfriend, your anxiety and stress rolling off of you in waves as Osamu scratches the back of his head. It’s quiet as he sits on Suna’s other side, leaning forward with his elbows on his knees while you rest your head on Suna’s shoulder.
“We gotta talk ‘bout it now, huh?” he asks, looking to his side at both of you.
“I think we have to.” you mutter, pulling your bottom lip between your teeth as you glance at both men. Suna hums, playing with the ends of your hair while looking over at Osamu.
“Tell us why you keep walking in and we’ll spill why we keep fucking with you there.” you scoff at his language, hands covering your cheeks as they heat up while you look at Osamu who isn’t any better off than you yourself. His cheeks are red as he looks away, frown and furrowed brows causing his face to wrinkle prematurely.
“The first couple times were mistakes.” having not expected him to actually play along, your eyes widen as you lean in to listen better, Suna not far behind you as his arm snakes around your waist. “After that I…” somehow, his cheeks grew more vibrant as he sighed, “I um, after the second time I jerked off in the bathroom next to your room so I could listen to you guys. The third time was an accident only because I’d been watching from the door and accidentally bumped it fully open.” His words make Suna’s eyes and smirk widen as his surprise increases similarly to your own. You’re practically frozen with shock though that doesn’t stop the warmth blooming under your skirt.
“Surprised you haven't asked to join.” Suna jokes, a harmless glare is sent his way by Osamu.
“Do you just prefer watching?” you ask softly and with genuine curiosity as Osamu groans and leans back, allowing the tent in his pants to become visible to you and Suna.
“I don’t fuckin’ know.” he huffs, hand covering his face though when he peeks from between his fingers he sees both of you looking at his bulge.
“Osamu,” you call, eyes shining in a way he’s only ever seen when you flirt, mostly with Suna and rarely with him. “After the first time, we would just keep going after you left. Then, we just stopped stopping even when you were there.” you smile teasingly, catching the way his lips form a reluctant frown, “Though I’m sure you know all that, what you don’t know is that Suna fucks me harder with you there and I moan louder so that you can hear me.”
“When we can hear your footsteps getting closer her pussy clenches around me so fucking tight.” Suna snickers, earning a whine from you before continuing, “We like giving you a show, and if you like watching we shouldn’t beat around it.”
“Unless you do wanna join?” you offer, tilting your head as you look at Suna who grins and nods.
Osamu’s eyes squint at the both of you, his face relaxing as he sighs. “I haven’t fucked in months.” he admits, hand dropping to adjust his bulge.
“We can tell.” Suna hums, laughing when Osamu scoffs, causing you to smile.
“Why’s that?” you ask, hand trailing up to Suna’s jaw to turn his lips towards yours for a quick kiss before you stand, “Have you been saving yourself for us? Hoping we’d invite you to join?” Osamu’s legs spread and you step between them, eyeing his tented pants as his breathing grows ragged. Suna slides closer, hand pulling one of yours to Osamu’s thigh as you sink to your knees. Suna’s hand rests on the back of your head, pulling your hair and causing your head to nod back. You send a glare to Suna who smirks down at you.
“Watching from our door, you know we kept it unlocked for you?” Suna turns and looks at Osamu who has leaned back against the couch, expression making it plainly obvious he's trying to decipher Suna. Suna simply grins, a lazy smile hitched on his teeth as he leans in enough for Osamu’s eyes to glance down to his lips. You lick your own lips, nuzzling Osamu’s thigh as you watch the two guys hesitantly kiss. Your cheeks warm and despite not being a part of the kiss your pussy clenches all the same when you see Osamu’s lips part and his head tilt to the side, allowing Suna to slip his tongue in and deepen the kiss. A whine escapes you, hands tugging on Osamu’s pant legs.
“Osamu,” his name is a breathy moan on your lips, “can I touch you?”
He pulls back from Suna, eyes on you while a string of saliva connects his and Suna’s lips, “Fuck yes.” At his affirmation your hands slide along his inner thighs, eyes lingering on their faces before you look down, pulling the zipper down and unbuttoning his pants. Suna palms his own bulge while his free hand returns to your hair, sliding down to cup the back of your neck.
“You wanted us?” he asks Osamu, eyes back on him catching him biting his lip and grunting as you pull his dick free.
“I wanted to join.” he mumbles, eyes glazed over and expression already desperate for you both. Suna smirks, slipping off the couch as you lick up Osamu’s precum, tongue laving up and down the length of his cock. He settles behind you, caging you in against Osamu’s spread legs with his hips bucking against your ass. You feel his hard cock press against you, your hands sliding around Osamu’s thighs for more stability. Knowing how Suna likes to get, you’ll need the extra security.
“Keep going.” Suna whispers into your ear, one hand on your hip with his fingers slipping under your waistband while his other hand grips the base of Osamu’s dick. He pumps while you take his tip in your mouth, tongue rubbing against the bottom causing Osamu to tilt his head back, groaning and running a hand through his hair. Suna whispers into your ear, his smirk audible to only you as he instructs you to take Osamu whole. While you throat Osamu, Suna grips his base hard and tugs until your lips meet his hand. Osamu grunts, his hands latching onto both of your heads earning a moan from you and a snicker from Suna.
“Fuckin’ brats.” he growls, bitting the inside of his cheek before his eyes roll back when you swallow around him.
“Got her well trained, yeah?” Suna mutters and you push your hips back harshly, hitting his dick hard getting him to double over and rut against you. “You are a brat.”
“Yer the brat.” Osamu glares down at him, his hand balling in Suna’s hair before pushing his mouth down to his cock.
Suna groans, one arm bracing him on Osamu’s leg while his free hand slips under your underwear, two fingers entering you and thrusting immediately. You whine, pulling off Osamu to gasp and pant. Before you can properly catch your breath, Osamu is pushing your face back down forcing your lips to kiss the length of his cock while Suna mirrors you on the opposite side. Cum is smeared on your cheek and Osamu fucking moans, huffing and biting his lips to the point of drawing blood when you and Suna start making out on his dick. Tongues out, swiping against each other and the hard dick weeping between you while your hands grasp for his balls to fondle, Suna’s fingers retreating from your pussy so he can remove your skirt and panties entirely. All three of you are breathing heavily, sweaty and hot with red faces and wet mouths. Your bottoms are completely off, both Suna and Osamu only have their pants unzipped and tugged down enough for their dicks to spring out. While Osamu’s dick is still getting sucked and kissed, one of Suna’s hands move back to pump his own dick before slipping it into your pussy. You moan and Suna sighs, huffing a laugh before bucking into you. The living room is full of painting and skin slapping, you and Suna return to making out on Osamu’s cock, both of you stimulating him with your hands as well while Suna pumps into you. You moan when Suna fully breaches you, his balls swinging as he bottoms out over and over again driving you closer. Osamu’s hand is in your hair while Suna pulls back to bite your neck, teeth scraping down your skin before stopping to mark your shoulder with a bruise. You’re the first to cum, body spasming as Suna picks up his pace and fucks you in earnest while Osamu pushes your lips down far enough for your nose to press into his pubic bone. Your moaning around his dick causes Osamu to cum down your throat while Suna cums deep in your pussy, both grunting as you sigh and pull free from the dick lodged down your esophagus.
It's quiet aside from labored breathing, you fall limp against Osamu’s legs as he runs his hands over his face and through his sweat slicked hair. Suna pulls out with a groan, you whimper squeezing your legs shut as he stands to get a towel. Despite your breath fanning over his soft cock, Osamu brushes your hair back and grabs a tissue to clean your face. His bottom lip is between his teeth until Suna comes back and pulls you onto the couch, breathing now calmer and no longer overstimulating Osamu’s worn cock.
“You must have been pretty pent up.” Suna chuckles as Osamu sighs and rolls his eyes. “Can’t handle a little bit of breath on your dick after cumming once?”
“Been a while.”
“Quit teasing him, Suna.” you slap his chest, cheek getting pinched in return.