Chapter Text
Iida Tenya did not really get jealous.
It just wasn’t a feeling that ever came up. He had learned from a young age to be satisfied with what life had given him. He was content with his looks and his intelligence, knew he was privileged as far as wealth went. He'd never worried about his social skills because...well…
He'd always had Shinsou.
He’d never had to worry about his relationship with him.
Never.
Growing up as kids, Shinsou absolutely refused to interact with other children their age. He’d glare at them when they would approach him and Iida at recess, make Iida move when they sat too close to them at lunch. When they were older and got to UA, Shinsou DID make other friends… a little unwillingly. But even then, Iida never got jealous because at the end of the day… Shinsou always came back to him.
Getting romantically involved didn’t change that. If anything, it only made Iida more confident in their relationship. He could never doubt when Shinsou’s hand fit so perfectly in his, when the man’s gaze always seemed to land on him, even in a crowded room. He couldn’t doubt when it was him that Shinsou clung to at night. Every little thing Shinsou did let Iida know that he was as devoted to the man as Iida was to him.
Or at least… that Shinsou was too lazy to find another lover.
Iida was pretty positive that wasn’t the case. Shinsou had shown absolutely zero romantic or sexual interest in anybody in the 20 or so years Iida had known him.
Which is why Iida was wholly unprepared for Mizusawa Tashiro, AKA sidekick Dust Storm.
Iida had been excited at first to hear that Midoriya had hired a sidekick to specifically help Shinsou on the graveyard shift, especially one whose quirk so perfectly catered to Shinsou’s fighting style. Tashiro would call up a dense cloud of dust, blinding enemies and leaving them disoriented enough to respond to Shinsou when he called to them with an altered voice.
Iida had simply been happy that someone was there to have his boyfriend’s back.
And then… Shinsou started talking about Tashiro in a way he really hadn’t spoken about anyone before.
He didn’t gush about the man, that wasn’t something he’d do. But he would casually mention him during breakfast, telling Iida about a funny quip the man had made or about a conversation they had.
Iida had walked in on him once tweezing his eyebrows, something Shinsou had probably never done before in his life . When Iida inquired after the behavior, Shinsou had simply shrugged and informed him that Tashiro had suggested it so he thought he’d try.
Still, Iida didn’t even think to be jealous.
Not until Tashiro messed with one of the things Shinsou considered most sacred.
His coffee.
There were days when Iida got off late around 11pm, just as Shinsou’s shift was beginning. On those occasions… Iida dreaded not seeing his love before bed so he’d change into civilian clothes and stop by the Justice One agency on his way home. Whenever he did this, he’d always bring Shinsou a coffee. The largest cup of whatever plain dark roast the nearest coffee shop had. Iida knew Shinsou like it black unless the weather was warm, then he’d have them add a couple pumps of hazelnut. Shinsou would pretend to be annoyed at the ‘useless flavor’... but Iida knew how his eyes would flutter in pleasure when he thought Iida wasn’t looking.
It had been rather warm so the cup Iida walked in was black and bitter.
He hummed to himself as he checked in at the desk and rode the elevator up to the agency's central hub. Most of the halls were only dimly lit at this time of night, but he easily found his way to where Shinsou’s desk was.
He froze as he approached.
Shinsou wasn’t at his desk, but there was a man leaning against it, also holding coffee. And he looked… well he looked like Iida .
Well that wasn’t exactly true.
Same eye color. Almost the same hair color, but where Iida liked to keep his neatly styled, this mans was longer and pulled back into a tousled bun. His skin was healthily tanned, better than if Iida had spent weeks at the beach.
His hero suit consisted of a skin tight, white sleeveless top with billowy hakama-like pants and knee-high white combat boots. The top left absolutely nothing to the imagination and his visible arms were not necessarily bigger than Iida’s, but his muscles seemed sharper, more defined.
He looked like Iida if Iida was more conventionally attractive.
At least Iida thought as much.
He was still staring at the man when someone called out behind him.
“Tenya?” Shinsou asked, hand sliding around Iida’s waist as he stepped up to him. “Off late?”
Iida blinked at him once or twice before answering. “Yes.”
“Is everything-”
“Shinsou!” Tashiro boomed. “I got you your cappuccino.”
“Ah… thank you.” Shinsou smiled at Iida apologetically and then turned. He accepted the proffered cup and sat down at his desk. Iida was immediately uncomfortable with the way Tashiro dragged his hand over the back of Shinsou’s chair as he moved to stand next to it, leaning over him as he sipped.
“It’s your usual order.”
“It’s good. Thank you Tashiro-san.”
Usual order? Iida frowned in confusion. Iida had known Shinsou’s usual order literally from the moment the man had first stolen Aizawa’s thermos way back as preteens…. Hadn’t he?
“It’s my pleasure.” Tashiro beamed and then looked over at Iida. “Now who were you?”
“Tashiro this is my fiance, Iida Tenya.”
“Oh I hadn’t realized you were serious about that.” Tashiro laughed and reached over to rest his hand on Shinsou’s shoulder.
To Iida’s utmost surprise, Shinsou didn’t even flinch at the other man’s touch. In fact he seemed almost to… lean into it. He started laughing as well.
“I know. It’s hard to believe anyone would want this.” Shinsou laughed as he logged into his computer.
“Don’t sell yourself short.” Tashiro laughed again. “So Iida-san, is it intimidating being in a relationship with a pro hero?”
“No.” Iida said dryly.
“Tashiro, Tenya is also a pro hero. You know… Team Idaten?”
“Y-you’re Ingenium? I wonder why Tosh has never mentioned that.”
“ Tosh ?” Iida said, taken aback. No one but ‘family’ called him that, not even Kaminari and they were best friends.
“I guess I assumed it was common knowledge.” Shinsou waved a dismissive hand, not even phased.
Tashiro just shrugged, returning to mindlessly stroking Shinsou’s shoulder with his-
For the first time in his life, Iida felt the knot of jealousy tighten in his stomach.
“Hitoshi.” he blurted suddenly. “May I speak to you in private?”
“What? Yeah uh… Tashiro can you finish pulling up our leads for tonight?” Shinsou stood and gestured to the computer. Tashiro discreetly glared at Iida before sitting down.
“What’s up?” Shinsou asked.
Iida grabbed his wrist before hauling him a few feet away, into the darkened lead hero's private office.
Midoriya’s office.
He pushed Shinsou in and then shut the door behind them. He flipped the lights on and took a deep breath.
“Tenya?”
“I brought you coffee.” Iida said, ignoring his question. He held up the cup he had been holding the entire time.
“Thank you?” Shinsou reached for the cup but Iida took a step back.
“But I have evidently got your order incorrect.” Iida set the cup down on Midoriya’s desk, out of Shinsou’s reach. Shinsou just raised an eyebrow at him.
“Cappuccino?” Iida asked, narrowing his gaze.
“What… the fuck is happening?”
“You hate milked coffee. Or at least I thought you did.”
“I… generally do yes.”
“But you will drink it if Tashiro buys it?”
“His shop only sells fancy shit. He gets it with almond milk, I don’t prefer it but it’s not that bad. Why does that upset you?”
“He called you Tosh.”
“...”
“He was…. Rubbing you.”
Shinsou’s eyes widened with realization for a split second before he grinned.
“You’re jealous.” Shinsou bit his bottom lip, trying to hide his amusement. “Babe he bought me coffee. And you know you’re it for me.
“But he is me.” Iida frowned. “A better version.”
“What do you mean?”
“He bears a striking resemblance to myself, if I was perhaps more traditionally sexy.”
Shinsou thought for a moment before he shrugged.
“I guess he resembles you a little. In a bad-boy sort of way.” Shinsou took a few steps forward and hooked his fingers through Iida’s belt loops. “But I really prefer…good boys?”
Iida huffed a laugh and dropped his forehead against Shinsous.
“I apologize for being unseemly, I just…”
“You don’t think I’d do anything do you?” Shinsou asked, voice suddenly unsure.
“No.” Iida said without hesitation, and it was true. He may be jealous, but he trusted Shinsou above anything else.
“However,” Iida continued, nudging his nose against Shinsou’s. “I do not trust that HE won’t try something. Even after you told him I was your fiance he kept…touching you.”
“So he’s sucking up a little. He wants to make pro and impressing me means impressing Midoriya.”
“He does not get to touch you.” Iida felt something a little possessive start to take over in the back of his brain. His hands drifted down to settle firmly at Shinsou’s waist and he started guiding him backward until Shinsou’s butt bumped up against Midoriya’s desk.
“Ten…” Shinsou said in warning.
“When are you scheduled to patrol?”
“Technically now .”
“You are regrettably going to be late.” Iida let his hands slide to Shinsou’s backside, down over the slope of his ass to his thighs where he effortlessly lifted the smaller man up and onto the desk, slotting himself between Shinsou’s legs.
“What in the holy fuck has gotten into you?” Shinsou sounded breathless.
“You’re mine.” Iida growled. “And I’m going to show him.”
“How- ahHH” Shinsou’s question was cut off by his own moan as Iida bent down and attached his mouth to Shinsou’s neck.
He started sucking and biting down the column of Shinsou’s throat with an intensity that shut down every brain cell Shinsou had left and sent all his blood down south. His hips jerked up involuntarily, but Iida was quick to pin them down. His large hand enveloping nearly half of Shinsou’s thigh, thumbs gripping tight enough to bruise.
Iida’s mind was just as far gone, if not more so. The only thoughts running through his head were how badly he needed Shinsou to feel him, to make him understand how consuming his love for Shinsou was. That possessive part of his brain repeating mine mine mine .
Shinsou was pliant beneath him as he moved his hands, scrambling for the zipper of Shinsou’s hero jumpsuit. His mouth didn’t leave Hitoshi’s skin as he pulled it down far enough to snake his hand inside and down.
“Jesus FUCK-” Shinsou gasped as Iida wrapped his fingers around him. “He’s going to hear us.”
“Don’t care.” Iida mumbled, switching to the other side of his neck. With his free hand, he pushed Shinsou back onto his elbows, pressing their chests together so close he could feel his own hand working Shinsou against his stomach. He could feel the little thrusts Shinsou was trying to give under the bulk of Iida’s weight, desperate for even more friction than the man was giving him.
Iida groaned as Shinsou’s knee bumped his own crotch… but that wasn’t his goal here. This was about HIS Hitoshi. He pushed Shinsou’s legs wider, pushed the man even further to lay on the desk.
Shinsou grabbed at Iida’s waistband again, tried to pull their hips together. Iida snatched his wrist and pinned it out to the side, sending the coffee flying over Midoriya’s computer keyboard. Neither paid it any attention. Shinsou was too focused on the pump of Iida’s wrist. Iida was too focused on moving his mouth down to Shinsou’s exposed chest.
Normally when they were intimate, Iida was the rock… steady and solid. Shinsou tended to be the typhoon that crashed against the rock.
This was unexplored territory for Iida; possessive-driven instincts that he’d never run on before. It almost felt… similar to when he’d tried to take on Stain as a teen. But instead of anger it was just…
It really was jealousy.
Tashiro may have given him cappuccinos, but he’d never be able to give Shinsou this.
Shinsou’s entire body arched up off the desk as Iida picked up the pace, letting out a sinful moan that the entire floor would have been able to hear, let alone Tashiro just outside.
Iida let his tongue lathe around a few more spots on Shinsou’s chest before moving up to press a kiss on Shinsou’s jaw, just below his ear.
“Don’t you dare let him touch you.” Iida growled.
Shinsou could only whine in response, his only free hand flying to hold on to Iida’s shoulder as he pulled and pulled him to the precipice.
When Shinsou came, he did so with a choked-off moan; body tensing before going limp on the desk. Iida straightened with the faintest of grins, surveying his work.
Shinsou was heaving in deep breaths and he was absolutely covered, from his chest to his chin in deep plum bruises and bite marks. They’d all be hidden by his capture weapon but… Tashiro would see.
“Oh my god.” Shinsou breathed. “ Fuck .”
“I apologize if I caused you discomfort.”
“Fuck Ten” Shinsou pushed himself back up to a sitting position, “That was the best sex we’ve had in weeks.”
“Well then… you are welcome.”
He moved his hands to dance along Iida’s waistband, fingers brushing the bulge there.
“Do I get to help you with this now?” Shinsou asked.
“No.” Iida sighed and ducked in for a quick kiss. “You do need to patrol. I owe it to the citizens of this city to not keep you any longer.”
“Fuck the citizens.”
“ Besides,” Iida continued, pointedly looking at Shinsou’s neck. “I think I made my point.
Shinsou furrowed his brow and looked down. His eyes went wide.
“Oh my god.” Shinsou pushed Iida back and waddled in his half open suit to the window. It was reflective enough for him to see the damage Iida had left all over his skin.
“Oh my god.” He repeated.
“I would apologize, but I am not sorry.” Iida straightened and began to clean up as best he could, making a mental note to paypal Midoriya for a new keyboard. Shinsou took a few more minutes to collect himself and stole a few more kisses before they stepped back out of the office.
Tashiro was still sitting at the computer, red as a tomato and refusing to make eye contact with either of them as they said their goodbyes. Iida supposed he should feel shame… He probably would tomorrow when the reality of what he’d just done hit him.
But for now he let himself feel ever so smug.
He might have to start leaving Shinsou with some love bites a little more often.