perfect trinity

by semdere

Summary:

Apparently "3" is the number of perfection...

(Kawanishi walks in on Shirabu and Semi mid-fuck)

Notes:

• For yoom_ss.

happy 1 year anniversary to the stzw server! and a very special cheer to my giftee yooms!! i was so happy to be matched with you <3 i had so much fun writing this :3c

Shirabu wasn't much of a crowd person. She liked having her own personal space and not breathing in the stale breath of strangers. She didn't like the sweaty warmth, or the background chatter over grungy music making it hard to even think.

Yet, Semi seemed to be changing that little by little.

The warmth sticking to her skin wasn't so bad if she wore light shirts and short skirts. The overloading sound of a cramped bar almost blurred out if she had a few drinks. And the lack of personal space was fine if it meant she could cling herself to Semi.

It was almost strange how quickly Shirabu grew accustomed to him. His hands felt right in hers and his voice sounded like home. She thought it was only something she'd find in Taichi. But maybe it was just familiarity confusing itself with something else, something more. Regardless, Eita made her feel warm.

Shirabu had her arms wrapped around his, her head leaning against his shoulder. They were seated at one of the booths with some of Semi's bandmates, comfortably squished together, laughter dancing around them. Shirabu had drifted away from the conversation, melting into Semi's side and feeling his voice and laughter vibrate through his body.

Eita's hand rested on her thigh, occasionally squeezing and drawing circles with his thumb. It helped the alcohol drowning her mind to paint thoughts of his hand trailing further, his fingers diving deeper, his voice speaking sins in her ears. Her mind became a gallery of lustful wishes. Shirabu chewed at her lip as heat began to pool deep in her stomach.

“How's my pretty girl doing?”

Shirabu looked up. Semi's breath was warm with whiskey and smoke. His hair was straying from the style he'd put it in, strands falling in his face, locks curling at his neck. She couldn't help wanting to taste him, couldn't help wanting to push her fingers through his hair.

She sat her chin on his shoulder.

“We should go so we can fuck.”

Shirabu watched the instant shift in his expression. He squeezed her thigh again before turning to the table and announcing their departure. Shirabu smirked as he deflected his friend's attempts to make him stay. The anticipation thrummed in her chest as he pulled her through the crowded bar to their exit.

As soon as they hit the cold outdoors, Semi was pulling her into a kiss. Shirabu couldn't help but smile as his lips moved against hers hungrily, eagerly letting him take his fill, savouring his taste finally on her tongue.

“My place isn't far,” she said, breathlessly, when he eventually pulled away, “we could walk there.”

Semi rubbed her sides. “It better not be or I'm just gonna fuck you on the sidewalk.”

“Gross.” She said, ignoring the way her stomach flipped at the thought. Shirabu almost debated whether it was worth seeing how much he meant that.

Semi just smirked back.

 

♡

 

It wasn't very often Kawanishi was able to leave work early. Tonight, however, he'd been blessed by a staffing error and an unusually quiet night. He wasn't really needed and it wasn't hard to fake an oncoming migraine. It's not like the job was particularly hard, but when it was dead he'd rather rip his hair out.

Kawanishi had texted Kenjirou as soon as he was out the door. He didn't expect a reply—he knew about her plans with Semi and also knew that, by now, she was probably in the midst of getting railed. He wondered if he should text one of his boys or just spend the rest of his night playing Doom. The dilemma see-sawed in his mind from work to their front door.

Kawanishi sighed as he entered their apartment. Immediately he was greeted with an extra pair of shoes—and the unmistakable sound of Kenjirou moaning. He froze.

Oh.

Kenjirou did mention they were going to a place nearby. And to be fair, if she hadn't been looking at her phone, how would she have known he would be home so early?

The thought of walking in on Kenjirou being fucked by someone else sparked a heat in his belly. Was that weird? Abnormal? Maybe. But Kawanishi had never been much for normalcy anyways, he hated conforming to other's expectations. Sure, this could be classed as something entirely different, but their relationship had never felt stronger than when they were open.

Plus, his girlfriend was hot. Why wouldn't he share that with others?

Another moan fell from Kenjirou's mouth and the sound went straight to his dick. Taichi didn't care about the potential consequences of interrupting. He kicked off his shoes, dumping his bag on the couch as he headed to their bedroom. The door was wide open.

They were towards the edge of the bed with Semi on his back, his hands spread over Kenjirou's bare hips. Kenjirou sat upon his lap, her knees pushed together, her feet pressing tip-toed against the carpet. Her brows were twitched up and her lips slightly parted as she panted out noises. Her eyes flew open as soon as he entered.

“Taichi—!” She was cut off by her own moan as Semi moved their hips together. “W-wait.”

Kenjirou tried moving off but Semi raced to firmly pull her back down on him. He sat up, staring up at him through hooded eyes as he kissed along her neck. Semi's hands ran down her thighs and pried them apart, giving Kawanishi a perfect view of the mess between her legs. Kenjirou's thighs were sticky with sweat and her pussy stretched around Semi's cock, both their sexes glistening with wetness.

Yeah… Kawanishi was glad Kenjirou matched with this one.

He unbuckled his belt, stepping closer.

“Is he fucking you good, baby?”

Kenjirou didn't answer. She was still looking up at him with a pale panic swirling in her eyes. Her face was tinted pink, cheeks flushed, lips love-bitten, and Kawanishi couldn't help but think how gorgeous she was like this. He tossed his belt aside.

Semi's hands slid up her waist to her boobs. His fingers brushed her nipples and pinched, making her yelp.

“Your boyfriend asked you a question.” Semi smirked.

“Y-yes…” Her voice came out shaky as Semi's fingers began slowly rubbing and circling her buds.

“Good.” Taichi said.

Kawanishi brought his hands up to cup her face. That panic in her eyes was already dissolving as lust began to seep through from Semi's touches. He leaned down to press his lips against hers. Kenjirou kissed back hesitantly, her stuttered movements becoming more fluid as he moved against her.

Kenjirou gasped and he seized the opportunity to slide his tongue between her blushed lips. Kawanishi lapped up every noise she made, savoured the sweetness glossing her tongue. Her hands gripped the ends of his shirt as the kiss became feverish, lips and teeth clashing. His hold on her jaw slipped back to thread through and grasp at her hair. He wanted more of Kenjirou, needed her as if she were his oxygen.

Her hands loosened on his shirt and fell down to the front of his pants. Kawanishi forced himself to pull away, sucking in a breath.

“Taichi…”

Kenjirou was looking up at him with desperation shining in her eyes. He knew exactly what she wanted—why would he deny it from her?

 

♡

 

Shirabu didn't know how it got to this. Her head felt marbeld and cloudy, the musky smell of Taichi's cock swamping her mouth. She could only focus on the saliva pooling behind her lips as she sucked on Taichi's dick and the wetness of Semi's fingers pumping inside her asshole.

She whined as Semi's lubed fingers wiggled and scissored, loosening her tight hole. It was a strange sensation yet she wanted more—needed more—anticipation drumming through her chest once again as her pussy begged to be filled.

Semi's other hand run through her hair, his nails dragging along her scalp, drawing out a moan from her. Her tongue slid along Taichi's length, the silky skin like bliss on her tongue.

“You want more, baby?” Semi's voice cut through her lustful mind. She tried her best to nod, settling for humming out a noise instead.

“Good.”

She yelped as Semi's palm shoved her head down. She gagged as Taichi's cock hit the back of her throat and delved deeper into her tight heat. Taichi moaned out a curse. She glanced up with watery eyes to see his head thrown back, neck moving as he swallowed.

“Look how good you make your boyfriend feel, baby.”

Shirabu moaned back in reply. She slackened her jaw, spit drooling down Taichi's length as she eased herself into deepthroating him. Tears slipped through her lashes as Semi guided her head up and down, accelerating her pace, all the while continuing to drive his fingers in her ass.

Shirabu watched the way Taichi's chest rose and fell with every movement, his breath stuttering out, his stomach muscles tensing as she sucked around him. The taste of pre melted on her tongue and she moaned.

She felt his dick twitch and she closed her eyes, readying herself for the spurts of come that were surely close—hoping for the savoury taste to fill her mouth.

Yet, right as the edge was at their fingertips, Semi tugged her head back up. Taichi's cock thumped back against his stomach while Shirabu gasped for air. Her throat ached. Taichi groaned.

“You're such a dick,” he grumbled. Eita chuckled lowly.

“You'll get over it.”

With a small nudge against her thigh from Semi, Shirabu crawled up over Taichi until she was hovering over his lap. Her boyfriend stared up at her, his hungry eyes making her cheeks redden. She wanted to kiss him, she wanted his cock in her mouth again, she wanted all of him.

Semi's hand slunk around her hip and down between her legs. Her eyes followed in an instant, biting her lip as she watched Semi spread her pussy. Taichi took hold of his cock, positioning himself upright. Her heart quickened as he rubbed his cock through her wet lips before settling his tip in the dip of her entrance.

“Hm, what's the magic word, pretty girl?” Semi teased.

Shirabu whined in annoyance. Her pussy ached at the emptiness inside and all she wanted was to be filled, the primal need prickling her skin. She grumbled.

“Please…”

She could almost feel Semi's smug smirk on his face. But her annoyance dissolved quickly as he steered her down onto Taichi's cock, the feeling of his girth like bliss to her aching cunt. Her head fell back and she sighed.

“You feel so good, baby,” Taichi breathed out.

Semi pushed her forward and Taichi reached to meet her lips halfway. The kiss was slow and messy, tongues gliding over wet lips, teeth colliding. As their mouths moved together she grinded down into his hips, moaning at the angles it pushed his cock into.

Behind her, Semi squeezed her cheek and she became acutely aware of something prodding her asshole. A slight unease prickled at her chest—

Shirabu gasped as Semi pushed the tip of his cock inside. She couldn't help the way her body tensed as he slowly stretched and forced his way in to fill the rest of her empty space. It felt invasive, intrusive, and her stomach sank. Semi kissed along the back of her neck, the touches making her shudder.

“You're doing so good,” he mumbled into her skin, “You're taking us both so well… Our pretty girl.”

A whine warbled in her mouth as she squeezed her eyes shut. The tenion was tight in her stomach. The air in her lungs felt thick. Her head felt dizzy.

“Breathe, baby.”

Shirabu opened her eyes to find Taichi cradling her face in his hands. She took a shuddering breath.

“You let us know if you need to stop, okay?”

Taichi was looking at her with eyes so full of care she almost felt like crying. Instead she nodded, blinking away her tears and earning a kiss to her forehead.

“Good girl.”

The stillness seemed to drag on forever as Shirabu did her best to breathe and adjust. Slowly the tension inside her eased to a dull discomfort and the air in her lungs became lighter. That tranquility felt like it shattered the instant Semi moved. She gasped. A jolt of uneasy electricity pulsed through her as Semi dragged himself out and dove back in.

Shirabu's nails dug into Taichi's sides as Semi gradually worked her hole. Discomfort and pleasure ebbed and flowed against each other until the uncomfortable stretch became a distant memory in the overwhelming bliss. The roll of Shirabu's hips was all the signal Semi needed.

He pulled her hips up before dragging her down, the forceful thrust of both cocks filling her simultaneously making her cry out. With the limiting position there wasn't much she could do but let Eita and Taichi push and pull on her; could only succumb to letting them use and control her body for their own pleasure. The realisation had moans falling off her tongue.

With every thrust she felt their cocks rub and abuse her fleshy wall separating them, felt them plunge deeper and fill more of her. Taichi continued to mark that special bundle of nerves while Semi pushed her past her limit of comfort. The combined sensation had her body in a fiery frenzy. It was too much, not enough, she wanted it to stop, she wanted more. Shirabu could almost feel her sanity slipping away.

“Every part of you feels amazing,” Semi uttered in her ear, his teeth grazing against every inch of skin he could reach. “You're so good at taking it… You were made for this, huh?”

“Mm, Kenjirou's a good girl,” Taichi purred, “Making both of us feel so fuckin’ good.”

Shirabu's breath was heavy, wet, and ragged, laced with whimpering moans as their words echoed in her head. The praise was fuel to the fire burning inside her, raising the heat flickering wildly beneath her skin. She felt so full—the thick and heavy pressure pumping into her stomach being the only thing she could think about.

“Please…” She mumbled.

“Please what, baby?” Taichi asked.

“P-please come.”

“You want us to come inside you?” Eita’s voice was hot against her ear.

“Fuck…” Shirabu whined. “Please.”

“Tell us how much you want it.”

Shirabu's shame and dignity were long gone, her mind and body consumed by pleasure as she babbled out her words.

“I w-want you both to come inside me so bad. Please, please. I need your come to fill me, please.”

She felt Semi smirk against her neck before he bit down, making her wince out a moan. He sucked against the sensitive skin while Taichi's hand ran up her thigh.

“Fuck!” She yelled out as Taichi's fingers began to massage her clit in wet circles.

Shirabu whined, unable to help the way her walls clenched in response, tightening around the men inside her with short pulses. The added stimulation shoved her closer and closer to the edge.

“You're so cute,” Semi cooed.

“Does it feel good, Kenjirou?”

“Yes,” she replied between breaths, “please, don't stop.”

The noises coming from her own mouth and pussy fueled her rising orgasm. Taichi's fingers moved faster against her clit and not a moment later she cried out, a rush of electricity washing over her. Her walls violently pulsed around the cocks insider her as she came, soaking Taichi in her slick, pushing both men towards their own orgasms.

“Shit,” Semi groaned. His and Taichi's hands squeezed tight on her body as Semi fucked her faster.

“Keep talking, baby,” Taichi urged.

“P-please, please come inside me, please.”

Shirabu continued to whimper out begs as they kept pumping their cocks inside her. The sound of her wetness slapping against them bounced off the bedroom walls. Her body quivered as her now sensitive cunt continued to be stimulated beyond her orgasm. It was euphoric, it was becoming too much.

She sighed when Taichi's dick spilled inside her, the heat feeling comforting. Shirabu ran her hands along his chest, dropping lazy kisses against his jaw as he panted out breaths. He swore as Semi's thrusts kept moving her on his cock, her trembling pussy forced to milk out every last drop.

“Mm, E-Eita, please.” Shirabu whined.

Semi's teeth found her neck again, biting down as he buried his cock inside her, rutting against her ass. He soon followed and Shirabu hummed at the sensation of more come filling her up. Semi's rough bite became gentle kisses along her shoulder.

“You're so perfect,” he breathed.

Taichi lifted her head up, smiling softly as he wiped away the hair sticking to her face.

“Our pretty girl.”

 

♡

 

A whine drew from Kenjirou's lips when Semi finally pulled out. His body felt like molten wax and it was a shame he couldn't live inside Kenjirou forever.

He hummed as he watched his load drool down her trembling thighs. It dribbled down to where Kawanishi's and her own had leaked out. He licked his bottom lip before shuffling back. He leaned down and licked up the mess painting her thighs, lapping at her dripping ring of muscle, savouring the way Shirabu whimpered.

“Gross…” He heard her mumble from Kawanishi's chest. Semi grinned lazily before kissing her hip.

“You love it.”

Shirabu didn't reply, just let out a noise that neither confirmed nor denied it. That was good enough for him. He gently took hold of her hips, easing her off her boyfriend's softening cock. Their mixed come bubbled out and Semi had the flashing urge to lick that up as well. But Kenjirou immediately flopped onto her back beside Kawanishi so instead he laid back too.

The three of them laid there a moment, catching their breath in the dusky afterglow.

Semi then suddenly wondered if what they just did would make things awkward; for him and Shirabu, for Kawanishi and Shirabu. He knew they had an open relationship, but did Semi make them break their own rules? Did Semi push them over their boundary lines?

He felt frozen, laying there as a worrisome doubt began raining down on his high. The self-paralysis only broke when Kawanishi rolled off the bed with a groan.

“Let's get you cleaned up,” he said.

Semi sat up as Kawanishi reached over to Kenjirou. She made a noise as he pulled her up into his arms with ease. He ignored the pang of envy as he watched.

Kenjirou stretched her arm, reaching out to him. “Eita also...”

Semi felt his heart skip a beat. He looked up at Kawanishi. His chest was begging him to do as Kenjirou said, to follow her to the end—but Semi wasn't Kenjirou's boyfriend, wasn't the one who got to decide. He didn't get a say in the matter.

Kawanishi just shrugged and motioned with his head.

“I'll run a bath.”

“Yaay…” Shirabu gave a quiet celebration as she was carried to their bathroom. Semi breathed out and followed behind.

Kawanishi placed a towel down before he settled Kenjirou on the sink. Semi held back a shiver at the cool tiles beneath his feet. He stood back as Kawanishi ran the bath, focusing instead on Kenjirou.

The love-bites bruising her skin and the pinks blushing her face had Semi's ego swelling. He loved the way she looked after sex, the blissed-out expression and lazy smile melting on her face. He loved knowing he helped cause that. When she looked at Kawanishi her eyes seemed to shine brighter, her cute smile somehow getting cuter. Semi wondered if she ever looked at him like that.

Soon the room was thick with steam and Semi was dipping into hot water. Kawanishi helped sit Kenjirou between his legs before kneeling to place a kiss on her head.

“I'm gonna shower in the other room and have somethin’ to eat.” He said, his hand tucking hair behind her ear. “I'll get you guys clean clothes.”

Kenjirou leaned into his hand. “Thanks, Taichi.”

With one final kiss to her head he left, leaving them to soak in the steam and heat.

“Your boyfriend's so nice.” Semi found himself saying.

Kenjirou tilted her head back to look up at him. He could see her smile twinkling in her eyes. He couldn't help but smile back.

“Right?”

Semi just hummed in response. He squirted some shampoo into his palm.

“Want me to wash your hair?”

“Okay.”

Shirabu wet her hair and Semi began working in the lathered shampoo. His soapy fingers slipped through the strands and massaged her scalp. Her content sigh sang through the room. He gently guided her head back to wash it out. He swished out the suds, cupping water to pour over the bubbles trailing her hairline.

His eyes flicked to her face and he caught her staring at him. He noted the faint freckles dusting her rosy cheeks and the gold blossoming in her brown eyes. Her face looked soft, content—he had the urge to kiss her.

He leaned his lips down to hers, pushing into the softness. Kenjirou hummed and her hands came up to run through his hair. The kiss was slow and gentle. It wasn't starved for more, gnashing teeth biting out. It was softer than that, tender. Semi felt a bloom in his chest and it took more than all his effort to pull back.

“Pretty girl,” he mumbled.

“Pretty boy,” Kenjirou replied.

Semi kissed her forehead before grabbing the conditioner. She sat back up and he ran it through her hair. She washed herself while it sat and Semi used that time to quickly scrub himself clean. He helped Kenjirou rinse out her hair once again, kissed her soft lips once again, before they leaned back and just let the heat meld their limbs.

In the hazy comfort his mind began to wade through dangerous waters. How did Semi make Kenjirou feel? Did she feel warmth bloom in her chest with him? Did she enjoy his company as much as Kawanishi? Did her face light up the same way when she saw him? Semi tried to cut the stream of thoughts off by quietly humming a random song. Still, a sting remained lodged in his chest.

He wasn't sure how much time had passed, but eventually Kenjirou's breathing began to slow and the water turned cooler.

Semi slowly sat up, carefully holding Kenjirou to him. He kissed the side of her face.

“Let's get you dry and in bed, pretty girl.”

She hummed and nodded before letting him help pull her out. Semi dried them both off, giving into his impulsive thoughts and leaving kisses on her stomach, her chest, her shoulder, her lips. Kenjirou let him. Somehow it made the sting in his chest hurt more.

When they entered the bedroom again, they found the bed made with clean clothes folded on top. They changed and Semi let Shirabu pull him into bed with her. It was easier than fighting with himself to leave. He was tired. That's all.

The mellow scent of fresh linen enveloped them as Kenjirou tugged the duvet over them. Semi wrapped his arms around her as she burrowed into him, her head settling on his chest. His fingers combed through her damp hair and she hummed.

“G'night, Eita.”

Semi kissed the top of Shirabu's head.

“Sweet dreams, pretty girl.”

Kenjirou nuzzled into him further. Semi watched her face soften completely as her breathing evened out.

He could hear the faint cluttering of Kawanishi in the kitchen, some show droning from their TV, and the distant mumbling of traffic below. They were all things Semi would have used as an excuse to ditch other partners, all things that would have been irritating. Yet Semi only felt warmth, only felt softness rolling through him. It was strange.

He didn't give his heart time to confuse itself. With Kenjirou quietly snoring in his arms he allowed himself to relax in that warm comfort, falling gently into the tender arms of sleep.

Notes:

♡ ִ ࣪ — thank you for reading! <3

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