Thread by @murcielagoAO3

#miyacest #sunamiya cw: underage, horny teens, car sex (of a sort), tight enclosed spaces, objectification, osaatsu, sunaatsu, sunaosaatsu

Atsumu's the one who discovers the special feature of Suna's car.

Osamu's the one who thinks up a way to use that feature to kill time on a Friday night, break up the usual pattern of hushed fucks in Suna's bedroom because they can't get away with it as easily at their house. The bunkbeds are a drag anyhow. Gotta liven things up some way.

"You want to do /what/?" Suna eyes him skeptically.

Osamu's not worried about Suna. Suna will give in to anything if it means he can get off. Osamu trains his eyes on his brother, gauging Atsumu's reaction.

Atsumu's pupils dilate, and he bites his lip.

Osamu's belly flips. He's /hooked/. "Yer in, aintcha? Tsumu?"

"Y-yeah," Atsumu nods. Osamu smirks, relishing the color rising to Atsumu's cheeks. He turns to Suna, who swallows, a greedy look in his eyes.

"Fine." Suna shrugs like he's bored, but he's quick to get out his keys.

They can't exactly get started in the parking lot of their high school, so the twins get into the backseat, and Suna drives them further out into the boonies.

In the meantime Osamu slides his hand between Atsumu's legs down his pants, kneading his crotch to get him in the mood.

They face forward the whole time, Atsumu letting out little gasps, face completely flushed. It's so hot Osamu grips his own crotch, his dick fully hard just thinking about what they're going to do.

"Jesus," Suna exhales, watching them from the rear view mirror. "I'm in the

wrong fucking seat, damn."

"Gonna get yer turn," Osamu cocks his head at Suna, licking his lips.

"Fucking better," Suna flicks him off, steering the car into a rural road with rice fields on either side, and pulling over in an out of the way spot.

They all get out, and walk around the back of the car. Suna pops the trunk with his key fob, and they look at the interior, partially filled with their backpacks and some gear. There's space for someone to get inside, and Osamu looks at Atsumu.

"Gonna be a tight fit," he says.

But that's the beauty of it—Atsumu likes tight fits. Likes being bound and constrained in corners of the locker room or in closets or in a filthy public bathroom stall in any number of parks in Amagasaki.

"I-I can do it," Atsumu nods, fronting, but he's clearly eager for it.

"It'll be dark," Osamu comments, giving him one last chance to back out.

Atsumu rolls his eyes, "I /know/ that, duh."

"Ok." Osamu pulls him in and gives him a sloppy kiss, hand fiddling with Atsumu's crotch again before pushing him towards the trunk. "Get in."

"Fuck, okay, 'm goin'," Atsumu says, moving some things around as he climbs in on his side, knees drawn up.

"See ya in a bit," Osamu says. Suna closes the trunk, mouth turned down.

Osamu slides hands on Suna's hips, and steps into his space. "Don't worry." He tilts his head up

and sucks on Suna's lips. Suna turns him and pushes him up against the trunk of the car, tongue curling deeper into Osamu's mouth.

Osamu /mmmmm/'s into it, grinding their bodies. The car rocks slightly and they hear Atsumu's muffled "Hey! Whatcha doin'?" coming from inside.

They straighten up, and Osamu laughs. He gives Suna one more kiss, then drags him towards the driver's seat. "Let's go."

Suna smacks him on the behind but gets in the car. Osamu gets into the back seat and pulls down the armrest, revealing the open passage that goes through

to the trunk. The design feature is probably so the car can transport skis or something similar in the trunk.

But the back of the armrest forms a small shelf inside the trunk space just /perfect/ for a chin, and Atsumu is quick to get into position, chin propped up, and

his cheeks cradled by the plush upholstery on either side of the slender opening.

"Feel ok?" Osamu asks as Atsumu gets comfortable.

In response, Atsumu smirks—and then opens his mouth, tongue out and waiting. Osamu shudders with need and hurriedly shoves his pants down.

Cock in hand, Osamu straddles the armrest and feeds his stiff length into Atsumu's waiting mouth, and then all the way back. Atsumu whimpers, sucking him down, and Osamu groans at the tight heat around him, his hips and body flush with the backseat of the car.

Like this, he can see out the back windshield but can't see his brother at all, just /feel/ the wet heat. It's such a rush he trembles there, savoring the way his brother's tongue caresses him all around, sighing, "Fuuuuuuuuuuuuck..."

Suna takes this as his cue to start the car.

Osamu jerks at the noise, thrusting into Atsumu's mouth and eliciting a moan.

"What now?" Suna asks.

"Just /drive/," Osamu says, pulling back so he can thrust back into Atsumu's throat.

Suna tsks, then puts the car in gear and steers them out onto the country road.

Through the back windshield, Osamu watches the sun setting and the fields flowing by on either side of the road, hips rutting in and out of the mouth attached to his cock, his personal glory hole. It's weird facing backwards but it matches the surreal sensations on his dick.

Atsumu's so fucking good at sucking cock, and something about knowing it's him but not /seeing/ him, just fucking into this hole in the back seat of the car is exhilarating. Every time Osamu feels like he's close he has to pull back, take deep breaths, ignore the urgent licking

of his tip that begs him to sheathe himself once more and blow his load.

Osamu hunches over, sliding back into Atsumu's mouth. There's nothing for his hands to grip but the tops of the seatbelts on either side of him, his body moving on its own accord, hanging on while he humps

the armrest and fucks Atsumu's throat, hoping he can breathe.

"/Shit/," Suna says, slowing down. "There's a cop up ahead."

Osamu's body seizes with the fear of getting caught, dick twitching on Atsumu's tongue. "Fuck, can ya just turn somewhere?"

"Won't that be suspicious?"

Osamu shakes his head, "No, pretend like yer just goin' home, just turn an' don't get pulled over whatever ya do!"

Suna slows down even more, and Osamu says, "Use yer blinker!"

As the car turns and Osamu catches a glimpse of the cop car, his muscles tighten, then relax as

the new road straightens out, no other cars to be seen.

"Fuck, that was close," Suna sighs. "Hurry the fuck up back there."

Osamu's whole body shivers. He grips the seatbelts and draws his cock almost all the way out of Atsumu's mouth, then fucks it back in, setting a careful

rhythm that will bring on his release. Atsumu whines, breathing through his nose, holding still for Osamu to use him as he likes. Osamu lets the tension build and this time he doesn't hold back, grunting and then shooting ropes of seed into his brother's swallowing, hungry mouth.

He pulls back for the last spurts, letting them fall on Atsumu's tongue. Atsumu groans and slurps everything up, mouthing Osamu's cock for every stray drip.

"Jesus, fuck," Osamu murmurs, body warm and tingling in satisfaction. He lets go of the seatbelts and scoots back.

Atsumu's face is ruddy and his lips swollen, but his eyes are blown wide and the way he's breathing tells Osamu he was jerking off there in the trunk while blowing him.

"Didja come?" he asks Atsumu, who bites his lip, then shakes his head.

"Good. Ya can come with Suna then."

"Fucking /finally/," Suna complains. "Going to find a place to pull over. Don't you come yet, Tsumu."

"Won't," Atsumu replies. "Hurry, Rin, wantcha really bad."

Osamu frowns, and flicks Atsumu's forehead. "Ya like my cock better, dontcha."

"Don't care which, I just want it!"

Suna chuckles. "Now that's the truth."

Osamu sighs and ruffles Atsumu's hair, then fixes his dick back into his pants and straightens his appearance. When Suna pulls over on an unpaved, rural road, they get out to trade places, but not before some more deep kissing and Osamu

reaching into the front of Suna's pants to stroke him fully hard.

"Ready?" he taunts, enjoying the way Suna's eyes flash with desire in the twilight.

"Just drive," Suna retorts, pushing him aside and climbing into the back seat.

Osamu grins and slides behind the wheel.

He angles the rear view mirror to get a good look at Suna's hard dick before he gets into position. Both he and Atsumu moan as he stuffs his cock through the armrest hole, his back arching to get his hips fully flush with the seats.

When Suna's got a rhythm going Osamu

turns the ignition and drives around the back roads of Amagasaki, no course in mind. He glances up to watch Suna's ass muscles contract in motion with his thrusts, and listens to Atsumu's muffled whimpers and Suna's breathy pleasure noises.

It's fucking erotic and distracting.

He definitely should not be driving while this horny; his throat's dry and his dick is twitching with interest in his lap, slowly filling to full hardness. Suna's shoulders and back tighten up when he's close, and then they relax, and Osamu knows exactly what's happening.

"Goddamn," he whispers, so turned on. He navigates the backroads where there's no cars at all after dark, just lonely lines of street lamps for safety.

"Fuck-fuck-fuck-wait—" Suna gasps, arching fully away from the backseat and panting heavily.

Osamu drops a hand to his groin.

"Problem?" Osamu teases, eyes glued to Suna's heaving back.

"Fuck you," Suna spits, chuckling. Atsumu gives a wordless plea that makes Osamu's cock jump eagerly in his pants, and both he and Suna curse.

The way Suna rushes to get his cock buried inside Atsumu again makes Osamu

clench his teeth, so hot and bothered he's definitely worried about driving off the road and putting them all in a ditch.

He takes Suna's hoodie from the front seat and puts it over his lap, gripping the steering wheel with both hands and turning the car back towards the city,

so he has more to focus on while driving than the obscene, sexy noises from the back seat.

Another few minutes down the road and he spies a fast food burger joint. Osamu smirks.

"Hey I'm a little hungry, gonna pull into the drive-thru. Want anythin'?"

"The fuck you are!" Suna snaps, glaring daggers over his shoulder. "If you fucking—!"

Osamu turns the car into the parking lot, getting in line behind two other cars in the drive-thru lane.

Suna scrambles away from the armrest, fuming. "You ASSHOLE!" he hisses, punching Osamu's

arm.

"Hey, watchit!" Osamu dodges the second punch, grinning and unrepentant. "'S dark out now, no one said ya had to stop."

"Fuck you!" Suna hisses, leaning over his lap with it's obvious bulge, face red.

"/Maybe/, if yer real nice," Osamu snorts.

Suna tsks, tossing his head. "As if. I'm /never/ fucking you again, how's that."

Osamu laughs unperturbed, and orders and pays for enough food for all three of them including their favorite menu items as a peace offering for later. Then he drives back towards the empty farmland.

"Coast is clear now," Osamu mentions, winking in the rear view mirror.

"/Thanks/," Suna deadpans.

"Ya owe us fer this, Samu!" Atsumu growls.

"Bought ya dinner, didn't I?" he says, deliberately taunting them.

"Little shits always get theirs," Suna snaps.

Osamu sticks out his tongue, but Suna turns his back in a huff and hurries to straddle the armrest again.

Atsumu's moan when Suna's cock is all the way back in his mouth is fucking /pornographic/. Osamu's neck flushes, partly embarrassed to hear a thing like that from his twin.

Partly annoyed that it wasn't /his/ cock bringing out that kind of sultry noise. And partly frustrated that he doesn't have a better view of what they're doing, like he would if they were fooling around at one of their homes.

He drives in long loops around fields of rice and

other crops, ears trained on the gasps and moans behind him that crescendo to a peak—

Suna grabs hold of the seatbelt in one hand and bites his fist when he climaxes, body vibrating for a considerable duration as he empties his balls into Atsumu's hot mouth.

Osamu squeezes his thighs together, dick painfully hard. "/Fuck/," he exhales, pulse racing in his veins, looking around for a hidaway spot. He finds a dirt road with a fence alongside a large barn, not a sign of anyone around or nearby.

He pulls over and sets the parking brake.

Then he turns his body in the seat to take in the sight of Suna, flushed and sweaty, and Atsumu's face wedged between the seats, teary-eyed and puffy-lipped and eyes still burning with hunger.

"Whatcha wanna do next?" he asks, pretty sure they're going to fuck around some more,

but the direction that takes could be just about anything.

Osamu meets Suna's eyes, which turn petulant. Is he still mad about the drive-thru?

But Atsumu's the first to speak, "Fuck me, wantcha to fuck me now, please!"

"Me or Suna?" Osamu asks, still looking at Suna.

"Either! Both! Don't care, just lemme outta here!" Atsumu shouts.

Osamu and Suna both get out of the car, and Osamu hits the button to open the trunk before returning the keys to Suna.

When the trunk lifts up, the safety light shines down on Atsumu, knees bent like before, but

shorts down around his knees and three fingers buried in his lubed-up ass. Beside him is the lube bottle Suna carries in his backpack, which has a side pouch conspicuously open.

Osamu braces against the car, head reeling from the sexy sight. He glances at Suna and they both

reach into the trunk to haul Atsumu out onto his feet.

"Backseat," Suna says, and they guide him waddling around the car.

Osamu gets in first, sliding across to brace his back against the opposite door, while Suna helps Atsumu get in. Osamu hurries to take his dick out.

"C'mere," he beckons to his lap. "I'll start, and Rin can getcha ready, then join." Atsumu nods, kicking off his shorts and briefs and climbing onto Osamu.

"Wait, the light," Osamu says, everything inside the car visible in the darkness surrounding them due to the open door.

Suna leans in and pushes a button by the overhead light, turning it off. Osamu relaxes, helping his twin get into position. He holds his dick steady and Atsumu slides down on it, shaking in pleasure. Atsumu's dick is stiff between his legs, and Osamu pulls him down for a kiss.

"Didn't come?" Osamu caresses his face.

"Felt like waitin' for this, for both'ya," Atsumu murmurs, kissing him back.

"Hey scoot down a bit." Suna hooks his hands under Osamu's knees and tugs him down flat, Atsumu moving with him. "Make room for me."

Osamu grins up at him.

"Should get a bigger car," he taunts.

"Shut up." Suna rolls his eyes. He opens the lube so he can get Atsumu stretched further open, then curses. "Fuck, I can't see. Don't want to spill this everywhere."

He reaches for the overhead light but Osamu stops him.

"Not that one—got a light on yer phone, dontcha?"

Suna swears, but takes out his phone. A soft blue glow fills the backseat, but it's not bright enough to be a problem.

Osamu starts to roll his hips up into Atsumu, thrusting slowly, and Atsumu closes his eyes and groans.

Atsumu feels like heaven. Osamu rocks their bodies together at a steady pace, feeding their desires but not rushing too fast. The thought of Suna's cock joining his makes his mouth water, and he licks the sweat from Atsumu's neck and throat while Suna's fingers curl into

his brother's hole, adding delicious friction along Osamu's rock hard dick.

Atsumu gasps and whimpers as he's stretched, and finally the light from the phone disappears and the seats dip as Suna gets into position.

"Hold on," Suna says, pressing the tip of his cock against

Osamu's, wedging it partially inside. Atsumu cries out, trembling, and Osamu soothes him while Suna concentrates on easing the rest of the way inside.

This isn't their first time at this, but it always feels new and exiting and a little insane, stuffing two dicks into one hole.

Suna hisses a string of curses as he slides all the way home, dick rigid and throbbing next to Osamu's.

Atsumu's weight is heavy and wonderful, cheek tucked into Osamu's neck, panting through it. Suna sets the pace, slow, unbearably good friction that ramps up as Atsumu relaxes

into it. A few full, powerful thrusts and Atsumu comes, crying out and spilling all over Osamu's shirt, shaking in ecstasy.

Suna holds still through his aftershocks, caressing Atsumu's back under his shirt. Osamu meets Suna's gaze, and Suna bends down so their lips can meet,

kissing him so intensely his head spins.

Suna draws back, and then fucks into Atsumu hard and fast, pulling the heat from Osamu's belly right into his dick and he comes suddenly and with a force that steals his breath.

His body arcs and tenses through his climax, arms hugging

his brother tight until his lungs unfurl and he's able to groan, twitching on the seats. Suna smirks at him, then closes his eyes, circles his hips and unloads into Atsumu, rutting through his pleasure and biting his lip.

"/Fuuuuck/," Suna sighs, keeping them connected.

"/Yeah/," Osamu agrees, exhaling and feeling quite content.

Atsumu giggles, completely limp between them. "Thanks fer the good idea, Samu."

Osamu laughs. "Would definitely do this again."

"Not unless you clean and air out my whole car first," Suna cuts in.

Osamu gives him a look. "That why ya didn't pull out yet, Rin?"

"It's going to leak /everywhere/," Suna sighs. "Fuck."

"Here," Atsumu says, pulling his shirt off. "Got messed up already anyhow."

Suna sighs, taking the shirt. He pulls out slowly and uses it to catch the cum

that drips out of Atsumu's ass. Osamu pulls out too, and Suna cleans them all then wads up the shirt and tosses it out onto the grass beside the car.

Atsumu grumbles aprotest, tugging on his shorts and boxers that fell on the floor. Osamu's shirt has spooge all over it, so he

peels it off, and opens the door behind him so he can scoot out from under his brother and get them some clothes from their gym bags in the trunk.

Suna opens it and they find what they need. Everyone gets changed, and then Osamu gets out the food from the front seat, including

the special items for Suna and Atsumu. The three of them sit on the front bumper of the car and eat their burgers, so hungry there's no conversation, just the sounds of munching fries and slurping sodas that mix in with the peepers and crickets out in the surrounding farmland.

It's so peaceful, they are completely shocked when bright white lights appear behind them from an oncoming car. They shield their eyes, turning to look—then realize that it's a /police/ car.

"Oh fuck," Osamu whispers.

"What do we do?" Suna asks.

"Act natural, ok?" Atsumu says, fixing a smile on his face as the cop car pulls up alongside them. "Good evenin' officer!"

The policeman looks them over, and then looks at their car, and at the surrounding area. "What brings ya out here, boys?"

"Nothin' much," Atsumu answers. He holds up his soda. "Just havin' some grub, then headin' home."

The cop looks them over once more, suspicions obvious. Finally he sets his mouth. "Best not be loiterin' then. And don't be litterin' neither."

"Oh no sir!" Osamu shakes his head.

"We'll clean up and take everything with us," Suna adds.

Satisfied, the cop gives them a nod, then slowly drives past them and on down the dirt road ahead. When he's out of sight. Suna leans into Osamu's shoulder, exhaling. Osamu chuckles, and puts an arm around his waist.

Atsumu laughs. "Scared ya, huh Rin?"

Suna rolls his eyes. "Question is why /weren't/ the two of you scared?"

Osamu looks at Atsumu, remembering countless run-ins in middle school being pranksters and pests. They both crack up, and Osamu gives Suna a kiss on the cheek.

"Tell ya some other time," he says, then gets up, bundling his trash. "Ready to head back?"

Atsumu sidles up to him, taking Osamu in his arms. "About that..." he says, grinning with mischief. "Isn't it /my turn/ on the backseat armrest?" He licks Osamu's neck enticingly.

Osamu lifts a brow, imagining the hot sight of his brother fucking Suna's mouth while he drives around the countryside. He swallows.

"Sure, I'll get the car started—" He turns to Suna for the keys, but Suna cuts in.

"—Not so fast," Suna says, a scary glint in his eye.

Osamu swallows, again.

Next thing he knows, Suna and Atsumu have tossed him in the trunk. "Little shits always get theirs," Suna repeats before closing the trunk door.

Osamu makes a racket on principle. He's /not/ the one with a confinement kink, but he's also not afraid of it.

He can feel the other two getting in the car, and closing the doors. Atsumu pulls down the armrest and peers at him, face positively ecstatic.

"Samuuuuu..." Atsumu beckons with a crooked finger.

Suna starts the car, and puts it in gear, foot on the brake.

"Better hurry before that cop comes back."

Atsumu licks his lips, shimmying his shorts down to show his half-hard cock, stroking it suggestively in front of him.

"Just /drive/," Osamu snaps. Then he fits his chin on the armrest and gets into position, jaws opening wide.

He sticks his tongue out in invitation, unbothered by this turn of events.

He can give as good as he gets, after all.

***

The end! 🦇💖✨

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