Chapter Text
The sounds of people screaming in the salty air did nothing to alleviate the sour mood Gyutaro was in. There was sand in his shorts and hair, even though he’d stayed firmly under the umbrella and on his carefully spread towel. He was sure he was allergic to the sun; he always got a terrible burn when he went out. Ume called him a vampire, completely ignoring the fact that her skin suffered from the same condition. She’d slathered on sunscreen upon arrival and went to play volleyball with the group that had carted down to the beach on their weekend off.
It was an odd assortment of people, some from Ume’s college classes, some from her part time job, and a couple of old friends that had tagged along. Somehow they all knew each other, which made him feel like even more of an outcast. Gyutaro didn’t want to come, but Ume had dragged him out anyway, saying that he couldn’t spend his summer inside. Gyutaro had complained that he got out enough going to work during the week, but Ume was hard to sway once she’d made up her mind. Her coworker Douma had a beach house not far from the ocean and offered to let all of them stay the night so they could also spend their Sunday sunbathing.
So now he was squinting against the summer sun glinting off the ocean waves, loathing the outdoors and the noise that came with weekend outings. He’d taken to people watching, sitting cross legged on his black and lime green beach towel.
He knew their old friends (Ume’s old friends); Akaza and Enmu, and her coworkers Douma and Tengen, but her college friends were a bit harder to remember. There was the tall one with long red hair, Kokushibou, who seemed uninterested in anything except winning volleyball, and you: Ume’s lab partner who she was probably foisting all her work onto if she was treating college anything like high school. It was you who piqued his interest the most, if for no other reason than you seemed thoroughly ecstatic to be at the ocean. You’d thrown yourself into the waves about a billion times so far, laughing and coughing when they inevitably pushed you over and towards the shore. You’d been at it for about three hours, only taking a quick break to run back to your towel for water here and there, offering him a shy smile each time. The rest of the group was engaged in their game of volleyball, while Ume was flirting with the guys on the beach.
His eyes tracked you as you dragged yourself up the sand towards your towel set down a few feet from his, plopping down and taking a deep swig from your water bottle.
“Not a fan of the beach?”
Your question caught him off guard, and he looked around to see if maybe you were talking to someone else. When it was clear that he was the only person within earshot, he grunted, shrugging and avoiding your eyes.
“It’s not for everyone,” you said, setting down your water bottle and digging out your sunscreen.
Gyutaro watched as you spread it over your arms and sandy legs, and across the expanse of your stomach and exposed breast tissue peeking out of your bikini top. He swallowed, tearing his eyes away. Girls always got mad when you stared at them too long, especially if you were ugly like he was.
“Um, if you’re not too busy, can you help me get my back?” you asked, holding out the bottle of sunscreen to him.
He stared blankly at it for a minute before glancing back up to your awkward smile.
“You… want me to help you?”
“Y-yeah, if you don’t mind?”
Gyutaro gingerly took the sunscreen in hand and watched as you turned, pulling your hair over your shoulder and out of the way.
“It’s alright if some gets on my swimsuit,” you assured him. “It’ll wash off once I get into the water.”
Gyutaro had never had a girl willingly get this close to him before, and the sight of your back had him feeling like he might throw up from anxiety. His fingers gently worked the sunscreen into your skin, his touches light and quick. He didn’t know why you were asking him to help when there were a bunch of other people who were a lot less awkward and ugly who would probably jump at the chance to caress the smooth skin of your shoulders and back. Gyutaro’s throat bobbed as he cleared it, handing the bottle back to you.
“Thanks,” you tucked it away again. “I appreciate it.”
He grunted again, looking the opposite way as you stood and headed back to the ocean to get pummeled by the waves again. This time, he kept his gaze fixed on you, watching the way your mouth curved as you laughed in the spray, the way your hair kept sticking to your face when you pushed yourself up. The sage green swim bottoms clung to your backside, leaving little to the imagination. Gyutaro forced down the thoughts that were starting to trickle in, knowing that if he got up sporting a boner, he’d never hear the end of it from Ume and her friends.
He spent two more hours sitting in a kind of purgatory; listening to the screams of laughter on the beachfront, feeling the grains of sand in his shorts, and trying not to get caught sneaking glances at you. Douma had come over at one point, stating he was going to go ahead to the beach house and get things unlocked and set up for the night, to which Gyutaro didn’t reply. What did the guy want him to say? “Thanks for inviting me on this stupid trip with my sister, I owe you one?” He’d rather eat his own shit. Enmu had trotted after Douma, waving his farewell to Gyutaro, who rolled his eyes.
“Gyu!” Ume shouted from across the sand, hands cupped around her mouth. “Start packing up! We’re leaving soon!”
About goddamn time, Gyutaro thought to himself, shoving towels and other miscellaneous beach items into their respective bags.
The sun was still up (it seemed to never go down in the summer) and would be for a few more hours, the air scorching his throat even before he took down the umbrella. The group finally rounded up, picking up their things and heading to the car. Gyutaro didn’t pay attention to the chatter around him, focusing on getting everything put in the trunk and claiming a spot for himself in the back. It wasn’t until Ume’s shrill voice cut through his thoughts that he finally opened his ears.
“Well tell him to drive back!”
Tengen sighed, rolling his shoulders as he shut the trunk.
“I’m not gonna call him to drive the twenty minutes back here just because we’re one seat short. Someone can sit on someone else’s lap.”
“I’m not sitting on anyone’s lap!” Ume snapped, arms crossed.
“Well, I’m driving, and Kokushibou is the tallest, so he gets shotgun,” Tengen opened the driver’s side door. “The rest of you can figure out how to cram yourselves in the back.”
Ume plopped into the backseat, scooting to the far side and settling in, glaring out the window. Akaza shrugged, moving to the middle seat, leaving you and Gyutaro to stare at the final seat.
“Um, I assume you probably don’t want to sit on anyone’s lap?” you tried to joke and lighten the mood, but Gyutaro was thinking of all the ways he could wring Douma’s neck and make it look like an accident.
“Hurry up!” Ume snapped. “She’s not that heavy, Gyu. Just let her sit on your lap. I’m gonna be crushed enough as it is with Akaza hogging the seats.”
Akaza didn’t even look offended, his lazy grin permanently etched onto his face as he folded his arms behind his head. Gyutaro scowled, settling himself in the last seat and tilting his head away as you carefully climbed in as well, setting yourself on his knees as lightly as you could. You braced your hands against the passenger seat in front of you, knees together, but legs splayed out to the side to accommodate Gyutaro’s large feet that took up the floor.
“Alright, everybody buckled?” Tengen asked.
Of course nobody was; this was the fucking beach and you were going to be taking a dirt road to Douma’s beach house, if Gyutaro’s memory served him correctly. No one cared about a fucking seatbelt.
“Um, I’m not,” your voice squeaked out, completely oblivious to the fact that Tengen was making a joke. “So just… drive carefully please.”
There were varying snorts of laughter around the car, leaving your face red with embarrassment. It was kind of cute, Gyutaro had to admit.
The car rumbled through the sandy parking lot, taking a left and heading down a paved road for about two minutes before turning onto the packed dirt road that Douma had cheerfully explained was the extremely fucking long driveway to the beach house.
The vehicle jostled, sending your arms flailing to hold onto something to steady yourself as you were nearly flung headlong between the center console.
“Gyutaro, hold onto her before she hits her head on something,” Tengen called over his shoulder, frowning.
You apologized to no one in particular as the car continued on, Gyutaro’s arms coming up to encircle your waist and pull you closer- but not flush- to him. It was taking everything in his willpower to ignore the proximity of your ass to his dick, which had already started to chub up at the contact. You smelled like ocean salt and sunscreen- both things he hated- but on you they made his mouth go dry.
Another divot in the road had Ume complaining about Tengen’s driving and Gyutaro holding back a groan as your ass pressed against his rapidly hardening cock. It felt so good but he was terrified you were going to notice and call him out on it, shaming him in front of everyone. But if he let go of you, then you’d probably hit your head on the ceiling or window from the way things were moving around so much.
Akaza was leaning forward and talking to the two men in front, while Ume was attempting to scroll her phone, but sighed in disgust every couple of moments when the car hit one of the six thousand potholes that littered the unpaved road. Gyutaro knew none of them were paying attention to him, but you were on his lap, sitting on top of his crotch, which was bulging against his swim shorts almost painfully now. Each bump in the road lifted you off him fractionally only to slam back down on his lap.
The slight gasp that escaped his lips did not go unnoticed by you like he prayed it would. You twisted a little to look at him, eyes worried as you opened your mouth to ask what was wrong. The next pothole threw you directly onto the fabric straining against his crotch, and suddenly your face lit up pink with recognition and your teeth clacked as you snapped your lips together.
It was all over.
You were going to call him out.
Gyutaro screwed his eyes shut, waiting for you to say something or slap him for being so perverted.
When nothing happened, he cracked open an eye, looking at you from behind your shoulder. Your gaze was straight ahead, tongue darting out to wet your lips. Gyutaro felt pressure on his crotch, and held back a whimper when he realized you had sat yourself with your back flush to his chest, ass covering his lap and jiggling with each jolt of the shot suspension on the old car Tengen drove.
Were you… not mad? There was no way you didn’t realize he was rock hard under his swim shorts as you shifted in his lap, making him squirm from the friction. Your eyes flickered back to him over your shoulder, meeting his. Your brows quirked together in a kind of apologetic look, but then his gaze dropped lower to where your teeth had caught your bottom lip, and realized that the look in your eyes wasn’t I’m sorry.
Your expression went straight to his leaking dick and he buried his face against your shoulder, muffling a groan alongside the accompanying bounce of the car. He could feel the seam of his shorts pressing uncomfortably against his cock as he tightened his arms around your middle, unable to keep from thrusting up as the car lifted and slammed you back down again. He was sure that was a squeak that escaped your lips, quickly covered up by the sound of Tengen telling Akaza to shut up about whatever he was going on about.
Ume had put her air pods in, staring out the window and texting someone, oblivious to the noise around here, or the desperate mess her brother was devolving into. Gyutaro’s raspy groans were harder and harder to hold back, his breath tickling your ear. You rocked your hips against his, hearing him whine and feeling the bite of his blunt fingernails against your hips.
Gyutaro fought against the urge to let his head loll backwards and his eyes roll into his skull, instead trying to time his desperate thrusting with potholes so that it would be less noticeable that he was dry humping his sister’s college friend in the back of her coworker’s car. His brain was starting to short-circuit, the situation growing more heated when the road became more consistently bumpy, Tengen calling back to “brace yourselves”. Gyutaro ground up into your clothed cunt, wanting nothing more than to rip your bottoms off and jackrabbit into you right there, but you two weren’t alone, and he was just trying not to make too much noise.
The constant jostling paired with the way you’d slid down a little between his spread legs, fingers digging into the wiry muscle of his thigh, made his balls tighten, and Gyutaro suddenly realized that if he came in his pants, it would be obvious. His hands tried to still your hips, panicking as he imagined the laughter that would ensue upon the arrival to the beach house. It was no use.
Between the way the car shook and the expression that lingered on your face, heavily masked but still visible to him, Gyutaro’s groin tightened and he choked out a moan as the car hit a massive pothole, cum staining the inside of his shorts. Akaza barely glanced over, too busy rubbing his head from where he’d hit the ceiling, complaining that Douma ought to get the road paved. Gyutaro panted as he came down from his high, trying to wriggle away from the continued stimulation as the car’s wheels were abused by the uneven road. It didn’t help that your ass was still pressing on him, and he swore that you were grinding against him, even without the additional help of the rocking vehicle.
“T-too much,” he whimpered in your ear, raspy voice low.
His face was flushed underneath his glassy eyes.
“We’re almost there,” you said, sounding breathless.
“N-no,” Gyutaro squirmed, but the shifting only made his cock ache more. “Too much-”
He felt pathetic, but he was going to go crazy. He wanted to fuck you, but he wanted out of his sandy shorts. The movement was too much, and not enough. You were still settled firmly on his now-damp lap, oblivious to his dilemma as your own bottoms were soaked previously from the water, and now with your own slick building up inside of them as you rocked against him, aching for relief.
“We’re here!” Tengen’s loud voice called out, snapping everyone to attention as the car pulled up to the beach house.
“Finally,” Ume shoved her door open before Tengen even put the car in park.
She clambered out, Akaza following soon after. Tengen vacated the car with Kokushibou, leaving you and Gyutaro to disembark last as their chatter faded through the front door of the unlocked beach house. Gyutaro’s hands flew off your hips as you moved to climb out, a blush lingering on his face. The mood had gone a bit stale with the abrupt arrival announcement.
“Um, s-sorry if the ride was unpleasant,” you mumbled, suddenly shy now that you could face him.
Gyutaro swallowed, looking away as he curled over his lap.
“’S fine…”
He climbed out of the car after you, hands positioned awkwardly over his crotch. Thankfully, everyone else had already gone inside, leaving the two of you to carry in the bags. While unloading, you pulled out Gyutaro’s towel and offered it to him. He took it with a muttered thanks, wrapping it around his waist. Your eyes flickered up and down his body as he loaded the bags into his arms.
“If you want,” you said, shouldering your own overnight bag. "Maybe you could come see me later tonight?"
Gyutaro froze, blinking before turning to look at you to make sure he was hearing you correctly.
“Wh-what?”
You wet your lips, stepping closer.
“Come by my room later and I'll ride you properly.”
Maybe a beach day wasn’t such a bad idea after all, Gyutaro thought to himself as he watched your lips curve up into a satisfied smile as he nodded dumbly.