Chapter Text
Shinsou rapt his knuckles twice on the door of the new-looking apartment. He waited patiently for an answer, blowing his warm breath over cold hands while he danced on the spot.
Really should’ve thought this through more. Could've at least waited till tomorrow when it would be warmer rather than freezing my balls off.
Despite the regrets already pinging around his brain, Shinsou knew he just couldn’t have sat at home any longer, mulling over the whole Bakugou situation.
Shinsou has always been a direct, kinda guy. Aizawa always said that his “lack of filter” when he got “ emotional ” was his fatal flaw and get him in trouble. So he couldn't say he hadn't been warned, as he stood out in the cold, knocking on trouble’s door.
Maybe they are not home, and I can leave without embarrassing myself. Bakugou doesn’t need me here defending his honour. Fuck.
He knew coming here and letting his mind wander on the way was just a way to avoid asking himself why he was ridiculously angry on the blond’s behalf. He shook his head of the thought, hearing someone approach the door.
His heart started beating rapidly as keys jingled and the lock was turned. Shinsou gulped audibly as the door slowly swung open to reveal a confused Kirishima.
“Shinsou, what’s up? It’s very late. I hope everything is ok.”
Shinsou forgot that Kirishima was not a small man, and despite being of similar heights, the unbreakable hero’s muscle seemed to make him tower inches above him.
Shit, shit, shit. Why am I here? This isn’t even my place. Bakugou is not some damsel in distress. Fuck he’d be so mad if he knew I was here. Shit.
“Eh. Hey Kirishima, is Midoriya about?” Shinsou patted himself on the back for the relatively normal sentence despite the anxiety coursing through his veins. “Of course, come on in.” Kirishima gave his big beaming smile as he waved him in, and the obviousness of his whole demeanour brought the anger he felt towards the man back to the forefront of his mind.
He’s a fucking donkey. Not even mildly defensive. He knows I was on mission with Bakugou…surely he can guess there is an issue. No? Or is he purposefully being obtuse? Ugh, focus.
“Actually, Kirishima, can you have him come out here? It’ll be quick, I promise.” Shinosu did not want to get cornered in their space, especially if it got confrontational.
“Em, sure?” Kirishima raised an eyebrow in confusion, but Shinsou saw not much else going on behind his eyes. “‘Zuku, sweetheart, Shinsou’s here at the door for you.”
Ew. Pet names? I’d rather die.
Maybe I’ve been hanging out with Bakugou too much…
Shoving his hands in his pockets, Shinsou realised that he didn’t know what he even wanted to say to either of them or why he was there in the first place. Well, despite how the mission ended for them, Bakugou had been nothing but a great partner the last few months and worked his ass off without too much complaint. He didn’t deserve to come home to such a slap in the face.
“Hey, Shinsou. It’s awful cold to be having a conversation outdoors. What’s up?” Midoriya had that stupid dumb look on his face, but Shinsou could see he was a little nervous underneath it all.
“Yeah, just wanted to check in with you to say we finished the mission early and all and let you know we were back,” which wasn’t a total lie, to be fair to himself.
“Oh, yeah! Congratulations, I heard it went well.” Midoriya smiled still but he now had a quizzical puppy look on his face.
Ughhhh, brain, come on, think! Think!
“Did Bakugou check in with you? I know you were sending him letters and stuff early in the mission.”
“Oh, yeah, eh, he hasn’t, but you know what he’s like,” Midoriya awkwardly scratched the back of his head.
“Yeah, I do” He really did, which is why he knows the guy is hurting, cooped up in a room that wasn’t sup posed to be his . Shinsou huffed and sighed, looking anywhere but at Midoriya as a wave of anger washed over him again.
“Look, Midoriya.” Yup. I shouldn’t have come here, this will be terrible. “I would like to know exactly how long something between you and Kirishima?— really? Kirishima?”
“Shinsou?! W-what? Wh-?” Midoriya stumbled and stammered over himself to answer.
“Look, I know this is coming out of nowhere, or maybe it isn’t–” Shinsou pinched the bridge of his nose, willing the migraine shooting between his eyes to ease for just a moment. “Please, just tell me.”
“A couple of months, officially. What is it to you anyway, Shinsou?” Midoriya seemed offended and was squaring up large, overly round shoulders at him.
Officially? Well shit, maybe Bakugou was right, and this was happening pretty much the whole time they were away?
“Were you planning on letting Bakugou know at any point in time that he was practically homeless?” Shinsou cheered his brain on for making a decent point that justified his being there.
“Hey, dude, that was uncalled for! Why so hostile?” Kirishima jumped to his boyfriend’s aid. The glint in Kirishima’s eye was different to before, calculating almost, and Shinsou zoned in on it. What he noted only strengthened his suspicions. “I don’t know what you think is happening, but I think it’s time you leave now.”
“Oh really, Kirishima? Not a clue?” Shinsou felt all the ugly emotions that had been simmering under the surface for the last few hours rise closer to the surface, and it took everything in his power to cool it down before he did something he really regrets. “You know what? It doesn’t matter anymore. Just next time, maybe both of you could let your best friend know about your life-altering plans before announcing them on social media. As a courtesy, you know?”
He turned and began walking briskly away, not turning around to see how either took his comment. “See ya around, Deku.”
Willfully ignoring all the rapid feelings weaving a knot in his brain, Shinsou vowed to not breathe a word on his visitation to anyone, and prayed Kirishima and Midoriya would do the same.
______
Shinsou spent the next few weeks catching up on trash TV, gossip at the agency, and spoiling his cats, all while keeping his secret, well, secret.
During that time, Bakugou, predictably, acclimatised quickly to the living arrangements and seamlessly inserted himself into apartment life with Todoroki and Shinsou. They all got on well and stayed out of each other’s way, for the most part. However, being an exceedingly observant hero, Shinsou began to notice a weird arrangement forming between his roommates.
Shinsou never had a problem with being a light sleeper with a chaotic sleep schedule. It suited him just fine—it was even beneficial for his work, or at least that is what he tried to tell himself. But his roommates were making him loath his inability to sleep through even an insignificant noise.
Shouto was a whiney bitch in heat whenever Bakugou fucked him. The moans, lewd squelching and banging of furniture everywhere in his apartment made him never want to touch another surface again.
He’d been so clued into his roommates' sex life that he could predict when the angry, hot, but heart-broken blond was going to dick down the absolute oblivious slut he apparently chose to live with.
Every time Bakugou had an encounter with either of his former best friends, whether it be a poster, TV ad, newsreel or in person, Shinsou knew he was going to be an unwilling aural voyeur to their animalistic mating.
He was beginning to think he was listening to the saddest nature radio documentary in existence.
In some sick, perverted part of his brain, which only seemed to surface when he was especially tired or overworked, he would get off to it. Shinsou pretend it was some lewd audio he’d found while he fisted his cock to completion. But, it was becoming more frequent too and Shinsou was worried he’d pavloved himself to get hard everytime he heard them fuck.
As he’s been intently listening over the last six weeks, he’d noticed more patterns. For example, he could tell by their joint hisses when Bakugou first presses past Todoroki’s rim and how they pause for a moment so Shouto can get used to the stretch, which only makes Shinsou’s mind wander much further— wider .
He can tell when Shouto has latched onto Bakugou’s nipple by the high-pitched “oh fuck” and keen it raises from the blond. Now every time Shinsou sees him, he has an insatiable urge to tweak one through his shirts, which barely contain the man’s pecs, to watch his face because he’s convinced it’s heavenly to see.
Right now, he wished he could see either of their faces. Todoroki was sucking Bakugou off like a champ, if the speedy suck and release he could hear two stalls down was anything to go by.
Shinsou knew he shouldn’t be there, firmly stroking his dick in an agency shower room. Not that his roomates should be giving blowjobs in a communal space either. But, he couldn’t shake the curiosity burning his mind lately that made him follow them in here after they got back from their joint-agency patrol.
They were all called into Endeavour’s for a meeting with several other heroes and Shinsou needed to know if his roommates were liaisoning outside the apartment too. He had been imagining them on rooftops, or down dark alleys, scuffed and scraped from fighting villains.
So, he left over an hour early for the interagency meeting and now here he was, standing in a cubicle two doors down, rubbing his thumb over the head of his cock and biting his lip hard to prevent himself from making any noise.
“Oh, fuck, Christ, Half-n-Half. Who taught you to suck dick- ah! Ah yes,- like that?” Bakugou was struggling to not blow his load. Shinsou could tell. The tenor of his voice would alter a third and be far more tense that his normal tone when he was holding back an impending orgasm. It was so fucking hot.
He wish he could see if Torodoki had a cocky, knowing smirk on his face to indicate he’d picked up on the change too. Shinsou needed more, needed to see and feel them, not just hear them.
A groan of frustration slipped past his lips and he froze. There was a pop from Todoroki coming off Bakugou’s dick and a pause of heavy breathing.
“Did you hear that?” Shinsou had to squeeze his dick in a vice like grip to stop himself from painting the wall with cum, hearing Todoroki’s scratchy voice from blowing Bakugou.
Shit, fuck, fuck, fuck. He must’ve been deep-throating him to sound like that. Oh my days. Don’t cum, don’t cum, don’t cum.
“What? I didn’t hear anything. Get back to work.” Shinsou could hear a gurgling noise and slight protest from Todoroki as Bakugou apparently pulled him back to ‘ work’ .
Shinsou could see his dick turning an anger purple colour from lack of attention and how hard it was. He closed his eyes, and keeping a firm grip, he began stroking himself, imagining it was his dick down Todoroki’s throat.
Shinsou lost himself to the fantasy and surrounding sounds, of Bakugou egging Todoroki on, slapping his balls against the the hero’s chin. “Take it you slut, fuck your mouth is so perfect. Perfect for taking my dick down your throat. Fuck, fuck!”
Shinsou could vivdly see in his mind, Bakugou’s deranged smile as he face-fucked Todoroki, who was slurping and gargling the man’s dick. He wondered if there was a fire of determination to take it from Bakugou in his eyes, or if Todoroki looked totally blissed out, without a thought behind those pretty eyes.
It was all too much and he fell over the edge, painting the tiles as he struggled to stay standing as he finished.
He focused so much on not making any noise that he could feel himself getting light headed. He made short quiet puffs of air in and out to catch his breath, barely noticing the other two had started talking.
“I’m just saying the anticipation of seeing them together is worse than it will be in reality,” Todoroki sighed, voice sounding a little worse for wear.
“I didn’t ask for your opinion Icy-Hot–”
“Yeah, you are going to hear it when you jump my bones or face-fuck me hoarse everytime they pop into your head, or because you can’t deal with seeing them, or they show up in a commercial.” Todoroki interrupted Bakugou harshly, sounding almost hurt.
“And what? Just because you let me fuck you, doesn’t entitle you to an opinion.” Bakugou bit back, and Shinsou could just feel his heart racing as he listened to the frustration in both their voices.
“I’m going to get dressed, see you at the meeting.” Shinsou winced at the dead monotone of Todoroki’s voice. That couldn’t be nice to hear after an intense encounter in the shower.
“Wait, Icy-Hot!” He heard Bakugou stomp out of the shower towards the locker room after Todoroki, voice fading. Shinsou really wanted to follow, to hear the rest of the conversation, but we also needed to wash the cum off the wall and then himself.
Later as he paid zero attention to the super important mission details, he noted the not-so-sexy tension rising between his two roommates. They barely looked at or acknowledged each other as they subconsciously increased the physical space between them. Any responses they gave to questions were clipped, at best.
Shinsou’s logical brain was concerned about what this… situation might do to the dynamic in his apartment. But his horny brain was lamenting that the nature-themed radio documentary he’d been enjoying just got cancelled.