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iris408 · 18 days ago

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Jealousy looks good on you, baby

Beach day with the boys (Roommate! AU)

CW : Explicit sexual content, public fingering, jealousy themes, possessive dirty talk, poly flirtation, light nipple play, possessive language, suggestive teasing, light voyeuristic dynamics, group affection/polyamory themes.

“Do you think this suits her ass better?”

Gojo’s voice made you flinch—he was kneeling next to your bag, holding up a red bikini like it was sacred lingerie. The bottom was a triangle of fabric, if you could even call it that. He tossed it on the bed beside five other bikinis that barely passed as clothing.

He grinned over his shoulder, “I’m packing this one. It gives ‘fuck me on the sand’ energy.”

You were blushing. Hard. Sitting on the edge of your bed, legs swinging slightly as he packed your bag for the beach trip.

He was, quite literally, packing your bag.

Correction: packing you into a walking wet dream.

The white one had been labeled “innocent slut vibes,” the red one “cocktease on a mission,” and the sparkly baby blue? “Cute but begging to be pulled to the side.”

Gojo grinned. “I think this one. Let’s see if it wiggles when you walk—”

This whole thing was Gojo’s idea, obviously.

You’d made the mistake of letting him take you bikini shopping yesterday—where he spent thirty minutes walking around the changing room, loudly narrating how each swimsuit would cling to your ass when wet, how your tits would bounce while running down the sand, and how he “definitely wouldn’t behave if you bent over for sunscreen.”

Nanami had refused at first.

“I don’t think going for a beach trip is necessary.”

That’s when Gojo had leaned in, grinning like the devil.

“Think about it, Nanamin. She’s running through the sand, tits bouncing, little bikini riding up her ass—sun hitting her skin just right—and then she trips and falls into your arms all soft and giggly—”

Nanami had muttered “Christ,” under his breath and said flatly, “I’m coming.”

Toji, however, had gone into full internal monologue mode.

He’d been pacing the living room while everyone discussed plans, muttering to himself like a man on the edge.

“Pros,” he grunted. “I get to see her in a bikini. Her skin all shiny, ass bouncing, tits perfect. Fuck. Definitely a pro.”

He paused, hands on hips. “Cons. Can’t jerk off watching. Can’t bend her over the damn beach chair. Some dipshit might talk to her and I’ll have to rip their jaw off.”

He sighed, deeply. “Shit. I’m conflicted.”

Back in your room now, Toji stood in the doorway, arms crossed, watching Gojo dig through your drawer.

“I still don’t think it’s a good idea.”

Gojo didn’t look up. “Why not, old man?”

Toji scowled. “Her. In a bikini. Fuck. Wanna see that. Skin all glowy, ass bouncing around, tits nearly spilling out in that sunlight.” His eyes narrowed. “But some fucker’s gonna flirt with her or brush against her and I swear to god, I will kill someone.”

Gojo just snorted. “They wouldn’t dare. Not when she’s showing up with four hunky bodyguards. We’ll just flex a little. They’ll get the message.”

Toji raised a brow. “We? Bro, you look like a fuckin’ twink with sunglasses and a sunhat. Nobody’s scared of you."

Gojo turned slowly. “This twink is gonna fuck our girl right infront of you if you keep talking.”

Toji stepped forward. “Try me.”

They were nose to nose now, chest puffed, about three seconds away from full-blown WWE-level fighting when a third voice cut through the air and Nanami finally stepped in :

“Enough.”

His voice was calm. Cold. Final.

He adjusted the cuffs of his linen shirt as he glanced between them, unimpressed. “No one’s going to bother her. We’ll be there. And more importantly—don’t either of you start bothering her.”

Toji grunted. “Tch.”

Gojo rolled his eyes. “Here comes the lecture.”

Nanami ignored them both.

Meanwhile, Geto—king of quiet chaos—was at the kitchen counter, humming under his breath while slicing mangoes and laying out strawberries in a Tupperware. Not a single complaint. Just smiling faintly to himself while the others fought over what bikini would make your nipples harder.

Because of course—he’d already prepped snacks. The man was plotting your beach picnic while Gojo debated if pink made your tits look perkier, and Toji planned a massacre for any man who even looked at you.

And all you could do was sit there, trying not to blush while your bag filled up with swimsuits that looked like they were made of dental floss and bad decisions.

Gojo turned back to the pile and held up a mesh cover-up so see-through it might as well be invisible.

“So. This with the pink bikini underneath?”

He wiggled his brows.

You stared at him.

He winked. “Bet Nanamin would call in sick just to rail you on the beach.”

You choked on your spit.

Toji muttered, “Keep talking like that and I will fuckin’ kill you.”

Nanami sighed again, pinching the bridge of his nose.

Geto just grinned and slid fruit into a little zip-lock bag like a smug housewife.

The day hasn't even started yet.

Nanami was driving like the responsible adult he was, hands on the wheel, sunglasses low on his nose, calm playlist humming through the speakers.

Geto sat shotgun, relaxed, window down, hair tied up, arm resting lazily on the frame like this was just a sweet Sunday trip to nowhere.

Meanwhile, you were sandwiched in the backseat like a goddamn treat pack—Gojo on your left, Toji on your right.

And they weren’t subtle.

“Mm-mm-mm,” Gojo hummed, slipping his hand under the hem of your sundress like it was second nature. “Are these the thighs that are gonna jiggle on the beach?”

Toji’s palm was already on your bare knee, sliding up slowly. “Not jiggling, more like bouncing. Like she’s built to distract everyone.”

“Built to ruin lives,” Gojo whispered against your ear, grinning when you tensed.

You were already warm from the sun and now your body was practically overheating—skin prickling, panties sticking, heart pounding.

And you hadn’t even made it to the sand yet.

Your hands were tight in your lap, thighs pressed together, trying to act normal while both men kept teasing you under the guise of "car affection."

Gojo leaned down slightly, lips brushing your shoulder. “What’s got you so quiet, baby? Cat got your tongue? Or is it someone’s fingers?”

You jolted when Toji’s knuckles grazed higher, dangerously close to your core. “She’s dripping already. Beach’s gonna get jealous.”

You whimpered—soft, shameful—and caught Geto’s eyes in the side mirror.

He just smirked knowingly and said to Nanami, “We might need to hose her down before we even lay the towel out.”

Nanami didn’t even blink. “Keep your hands off her until we get there. Or I swear, I’ll pull over and make you both walk.”

“Tch,” Toji muttered, fingers slowly retreating. “Buzzkill.”

Gojo made a show of raising his hands. “Sir yes sir, no touching the pretty girl. For now.”

You melted back into the seat, flushed and wet and panting quietly as the waves came into view.

When the car finally stopped at the beach, you were practically dizzy from arousal and embarrassment.

Gojo opened your door with a flourish. “C’mon beach bunny,” he sang, “time to get naked—I mean changed.”

He grabbed your wrist and tugged you toward the wooden change stalls, grinning like he was about to make trouble.

“Gojo,” Nanami said sharply, appearing behind you with a vein pulsing in his temple. “Let go.”

Gojo pouted. “But I packed her swimsuits, I should at least help her pick!”

Nanami swatted his hand away with enough force to make Gojo stumble, nearly toppling into the sand.

“There’s a women’s changing room that way,” Nanami said firmly, pointing. “She’ll change alone.”

You nodded quickly, muttering something incoherent and jogging off before any of them could follow.

Inside the changing stall, you opened the beach bag Gojo had packed.

And of course—he’d packed eight bikinis. EIGHT. In various shades of whore. All strings. All tiny. One of them had rhinestones that spelled out ‘WET’ across the tits.

You groaned and pulled out the most modest one—a string-tied blue triangle top with a matching thong that barely clung to your hips.

You tied it up quickly, adjusting the fabric so your nipples weren’t totally visible. Though, let’s be honest, it was hopeless.

When you walked out and stepped onto the sand, you saw them all at once.

Gojo, Toji, Nanami, and Geto—shirtless, glistening, abs on full display.

Only Nanami had on a loose button-up, thin and light, swaying gently in the breeze.

Gojo was already rubbing sunscreen on his chest, looking like a summer god.

Toji was stretching his arms overhead, back muscles flexing like he wanted to punish the sun.

Geto was laying out a towel, his toned body bronzing effortlessly under the rays.

And Nanami?

He stood tall, arms crossed, looking like a man trying desperately to hold onto his dignity. His shirt hung open slightly, sunglasses shielding his eyes—but not his glare.

Because Gojo had clearly tried to rip Nanami’s shirt off five minutes ago.

Evidence? The fact that Gojo had an icepack pressed to his face, cheeks puffed out, lips red.

“You didn’t have to punch me, Nanamin,” Gojo groaned.

Nanami didn’t even look at him. “Touch me again, and I’ll bury you in the sand.”

Gojo sighed, spotting you walking toward them, and instantly perked up.

“There she is,” he grinned, icepack forgotten. “Looking like a damn mirage—”

Toji’s eyes dropped to your chest and his mouth twitched. “Fuck.”

Geto raised his brows and handed you a bottle of cold juice. “Need a minute before the beach even starts?”

You were red-faced, already overheating.

"Fuckin’ hell," Toji muttered under his breath, his voice soaked in hunger and mischief. His eyes raked over your body without an ounce of shame, zeroing in on the blue string bikini that barely counted as clothing. "You trying to kill us out here or what?"

Gojo wasn’t any better. He let out a whistle, swinging the bottle of sunscreen in lazy circles as he eyed you. "I swear, that ass needs its own postal code. Is this even legal to wear in public?"

"Public place," Nanami cut in sharply, though he didn’t even lift his gaze from where he was securing the umbrella in the sand. "Try not to get arrested."

You sighed and sank into the lounge chair, brushing sand off your thighs as the wind picked up again, tugging your ponytail and throwing strands into your face. You twisted your neck, trying to get it under control, but the humidity made everything worse — sticky, clinging, heavy.

A shadow passed behind you. Then, gentle fingers brushed your shoulders.

"You’ll hate the tangles later," Geto said, soft-spoken and patient. He was already running his fingers through your hair, parting it into two sections. "Hold still, sweetheart."

There was something so calm in the way he braided. His touch wasn’t possessive — not like the others — but there was a quiet fondness in it that made your chest ache.

"All pretty," he murmured once he was done, and you gave him a quiet smile.

But peace was short-lived. A cold shock made you flinch as sunscreen touched your lower back.

"Time for me to rub you down~" Gojo cooed behind you, voice far too cheerful. “C’mon, bunny. Lie down.”

You lay down on your stomach, letting your chest press into the towel, cheek turned to the side.

Without warning, the strings of your top went slack, the sides of your chest spilled out.

"Gojo!" Nanami’s voice was sharp now.

"I'm just applying sunscreen," Gojo replied innocently, though his hands were anything but innocent. He smirked as he re-tied your top — barely — and slid his palms slowly down your back.

The lotion was cold, but his touch was warm, languid, exploring. Too thorough. Fingers dipping far too low before retreating, circling places they had no business circling.

He hummed a tune, all fake-innocence and beach-boy charm, while your cheeks grew hotter by the second. Even Geto had gone back to his snacks with an amused grin, letting the chaos unfold.

Eventually, Toji had enough. With a grunt, he stood and dragged Gojo off you with one hand like a rag doll.

“My turn.”

Gojo whined but gave up, already turning to drag Geto into the water with him. The two of them splashed and roughhoused like children, laughing too loudly, kicking up waves as you sat up and fixed your top properly.

That was when she appeared.

She was stunning. Her bikini was scandalous, even by your standards — barely-there straps, deep cleavage, glossy skin — and she made a beeline straight for Geto. Her shriek of delight echoed off the water.

“Suguruuu~ missed you so much, baby!”

She flung herself into his arms like it was rehearsed.

Toji leaned in with a low, amused whistle. “Oh-hoh. You seein’ this?”

You forced a smile, tightening your grip on the edge of the lounge chair. You didn’t want to look, but you couldn’t tear your eyes away. That easy way she laughed into Geto’s neck. How his hands steadied her automatically. The smile he gave her—fond, warm, familiar. A history you didn’t know.

“Must’ve been an old friend,” Nanami said softly, like he could read the flicker in your expression.

You nodded, but it was empty. Your chest felt tight.

Then Gojo came bounding back, flopping down next to you like he hadn’t just witnessed your heartbreak.

“Bunnnnyyy~” he grinned, resting his head in your lap with exaggerated affection. “Missed ya!”

Toji looked over with a scoff. “Who’s the chick, huh?”

Gojo shrugged lazily. “Old classmate. They used to date.”

Used to.

The words echoed in your head.

Your smile vanished completely. And then she kissed Geto’s cheek.

You didn’t think. You just acted.

“Gojo,” you said quietly. “Can you move your head?”

“Huh?” He looked up, confused. “But your lap’s so comfy—”

“Move. Please.”

You stood up, brushing your hands on your thighs.

“I’m just going to the washroom.”

Gojo scrambled to follow. “Wait—without me?!”

But Nanami’s hand clamped down on his shoulder, and Toji grabbed the back of his neck like scruffing a dog.

"Sit down," Nanami said flatly.

"Ughhh!" Gojo slumped back dramatically. “So rude!”

You didn’t hear the rest of their arguing. You didn’t look back.

The heat in your face had nothing to do with the sun now. Not really.

You walked away faster than you meant to, heart tight in your chest, eyes stinging with something you didn’t want to name.

Back on the sand, Geto had just returned when Nanami’s voice cut through the sound of waves.

“Suguru,” he said, calm but firm. “You might want to go with her.”

Geto blinked, brow furrowing. “Why? Is she alright?”

Toji sighed, half-laughing. “Just go, man…”

Gojo, ever the dramatic one, threw up his arms. “This isn’t fair! Why does he get to go and not me? You guys are so discriminating—it’s cause I’m prettier than all of you, isn’t it?!”

Toji scooped up a fistful of sand and flung it straight into his hair.

By the time Geto caught up with you, you were already sitting alone under a tall tree, its shade casting dappled shadows over your skin. There wasn’t a single person nearby — just you, with your arms folded and your knees drawn up, pouting into the wind.

He smiled the second he saw you. Quiet, upset, and trying not to show it. He knew the look. He walked over and sank down beside you, but you turned your face away like he was invisible.

He scooted a little closer.

You shifted away.

So he scooted again.

You moved one more time — and that’s when his hand caught your wrist, gentle but firm, and pulled you into his lap in one swift movement. Your jaw hit his chest, and his arms circled your waist.

“What’s wrong?” he asked, his voice low beside your ear.

“Nothing,” you muttered, refusing to look at him.

“Cat got your tongue?”

“There’s lipstick on your cheek,” you said flatly. “Wipe that.”

He blinked, amused, then wiped it off casually. “Oh? That better?”

Still no answer.

He tilted his head. “Baby looks so pretty when she’s jealous.”

You huffed. “I’m not—!”

He kissed you before you could finish. Deep and slow, with teeth tugging at your lower lip until it tingled. His hands cupped your jaw, then dropped to your hips, thumbs stroking over the strings of your thong.

He broke the kiss, breath brushing your lips. “Wanna tell me why you’re upset with me now?”

“I said I’m not,” you insisted, cheeks flushed and voice breathy.

His hand slipped beneath the band of your bikini thong. One long finger slid through your folds, making you jolt in his lap.

“A-Ah! Suguru!!”

“How about now?” he murmured, the pad of his finger circling slowly. “Gonna tell me?”

Your breath hitched. “Th…that’s… w-who was that girl?”

“Mmh. Yeah, thought so,” he smirked, pressing another kiss to your jaw. “Pretty baby. All jealous and possessive, huh?”

“I—I’m not! I was just asking!”

He delivered a sharp little slap to your ass, just enough to make you gasp.

“Ow!”

“Try again.”

You sighed, cheeks burning. “Fine… I don’t like her much.”

“There you go,” he chuckled. “She’s an ex. From college.”

“Yeah… Gojo said.”

“Oh?”

“Why’d she kiss you? And why’s she calling you baby and all…?”

Another finger slipped in beside the first, and you let out a soft hiss, gripping his forearm.

“She’s a bit like Gojo,” he murmured, fingers moving in a slow rhythm. “Flirty. Extroverted. I didn’t think she was gonna do that.”

“…Mmmhm… fine—Ah!”

He smiled as you squirmed against him, his fingers scissoring gently, teasing the tightest parts of you. “She said she misses me.”

You clutched his arm tighter, and he chuckled in your ear.

“You know what I said?”

“…What?”

“That I don’t feel the same.”

Your heart jumped a little. “…You did?”

“Yeah,” he said, warm and honest.

“She… said anything else?”

“She asked if I wanted to meet her this weekend.”

Your stomach dropped again. “And…?”

“What do you think I said?” he teased, curling his fingers inside you.

“I… I don’t know…” you mumbled, pouting again.

He bit your nipple through your top, making you flinch and whine.

“Ah! Ow!”

“I said I’m—” *thrust* “not—” *another thrust* “interested.”

“Suguru! Ah—stop! Please… people will see!”

“There’s no one here, baby,” he murmured, fingers still working you open. “Just you and me. And you’re soaking my hand while whining like a needy little thing.”

His hand lifted to cup your breast, thumb brushing your nipple through the thin fabric. You moaned softly, too lost in his touches to pretend otherwise. The heat coiled deep in your belly, rising fast.

“Let go,” he whispered. “Come for me, baby. Show me how jealous you are.”

Your head fell into Suguru’s shoulder, lips parting on a trembling moan as his fingers kept up their slow, rhythmic pace. Your walls fluttered around him, too slick and swollen to resist anymore. His other hand cupped your breast, thumb lazily stroking over your hardened nipple through the thin triangle of your bikini.

“You’re such a mess, baby,” he murmured, lips brushing the shell of your ear. “All this jealousy, just to end up dripping down my hand like this.”

You whimpered, thighs tensing as the pressure coiled again — this time tighter, hotter. His fingers curled just right, finding that spot deep inside that always made your voice catch. He pressed a slow kiss behind your ear.

“Come for me. Let me feel it. C’mon, let go for me like a good girl.”

Your body broke in waves — heat flooding your cheeks, breath catching, soft cries muffled against his throat. He slowed his hand just enough to ride you through it, murmuring praises against your skin.

“That’s it. My pretty baby. Always so perfect for me.”

You were still trembling when he slipped his fingers out, his arm snaking around your waist again. Before you could gather yourself, he scooped you up into his arms, bridal-style, and rose to his feet with a smirk.

“Let’s get you back, yeah?”

Your arms looped around his neck instinctively, face still flushed, thighs still twitching. By the time he stepped back onto the warm sand, Gojo spotted you and his eyes lit up instantly.

“OHHH! My bunny’s back!” he practically sang, making grabby hands. “Suguru, pass her here!”

Before Geto could say anything, Toji casually yanked you out of his arms like a prize being stolen.

“Move, temple boy,” he muttered.

You let out a tiny squeak, your arms now around Toji’s neck as he carried you with one hand under your thighs, the other sliding just a little too close to your ass.

“Toji—!”

He didn’t answer right away — just smirked and marched straight toward the waterline.

Once he reached the edge, he stepped into the shallows, then dipped you low, letting the waves splash against your skin. The cold hit your overheated body hard, making you shiver.

“Mmm,” he drawled, voice low and thick, “bet you’re even sweeter wet like this.”

“Toji—stop—!”

“Nope,” he grinned, brushing a strand of hair from your cheek. “Soon as we’re home, I’m dragging you into the shower. Gonna bend you over the sink first, then fuck you into the mirror so you can watch yourself fall apart.”

Before you could protest, Gojo came splashing in from the side, cackling.

“Whoa, whoa, leave something for the rest of us, old man!”

Toji rolled his eyes but didn’t let go of you. Instead, he dunked you gently again while Gojo splashed your thighs and stomach like a child.

“Look at her—she’s glowing. We should get her wet more often,” Gojo teased, eyes glinting.

“Touch her again and I’m breaking that pretty jaw of yours,” Toji muttered.

You pushed at both of them half-heartedly, squealing as Gojo flicked water at your chest.

Eventually, laughing and dripping, you pulled yourself out of the sea and walked back toward the beach chairs. Nanami was waiting, still sitting under the umbrella’s shade, book in one hand. When he looked up and saw you, he set it down and opened his arms.

“Come here.”

You didn’t hesitate — you dropped into his lap, arms sliding around his neck. One large hand rubbed soothing circles on your thigh while the other plucked a small piece of pineapple from the tray beside him.

“Open,” he murmured.

You did, and he fed it to you, the sweet citrus bursting over your tongue. You hummed quietly, leaning into him. .

“Oho? Pineapple, huh?” Gojo plopped beside you both, grinning wickedly. “Did you know it’s supposed to make you taste sweeter? Not that you needs any help in that department…”

You choked slightly, face burning, and Nanami flicked a piece of pineapple at Gojo’s forehead without even looking at him.

Gojo laughed and caught it in his mouth.

Toji just shook his head and muttered, “Fuckin’ idiot.”

Suguru came strolling up from behind, now freshly dried with a towel over his shoulders. He dropped a kiss to your head and whispered, “Feeling better now?”

You nodded, the warmth in your chest finally matching the sunshine around you.

With Nanami’s arms wrapped around you, Geto’s soft kiss still lingering, Gojo teasing beside you, and Toji grumbling like a menace in the background — you realized something.

You didn’t need a perfect beach day.

You already had your favorite view:

Them. All of them.

And somehow, you were their favorite too.

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