Work Text:
“-ku? Hero Deku” Izuku jumped as the nurse poked his shoulder gently with her pen. “Are you listening?” She asked, exasperated.
“Sorry! I didn’t realize you had started talking to me.” He admitted, embarrassed at being caught. But she had been speaking to her assistant for almost 10 minutes, so Izuku hadn’t noticed when her attention turned to him as he waited for her to finish going over his file to be discharged.
She raised an eyebrow and Izuku could hear Kacchan’s eyeroll at her attitude. But that was why the medical staff liked dealing with Izuku more.
Kacchan would call him a pushover, but he and Eijiro were still the ones getting nicer staff.
“As I was saying, my assistant here used his quirk on you to remove any lingering trace of the villain’s poison from earlier today. While it wasn’t approved ,” She glared at the young man. “It was effective.” She handed Izuku a folder and gestured for him to open it. “Any side effects are in there and I urge you to call someone to pick you up. Under no circumstances should you be taking public transportation.”
Izuku skimmed over the papers, nodding along to the nurse’s words. It was the standard information, along with ‘Possible heightened sensitivity to scents. Possible heightened sensitivity to sounds. Possible heightened sensitivity to touch...Report back for sedation if symptoms become debilitating.’ All pretty standard stuff, Izuku thought.
He hadn't needed to have toxins cleared from his body with a quirk before, but Eijiro had once. He just felt very uncomfortable in clothes for a few days, and Kacchan had spent that time trying to wrestle him into at least some boxers whenever he left Izuku’s nest.
Not to say he and Izuku complained about their- then boyfriend- mate parading around in absolutely nothing, but Kacchan had declared they weren't allowed to be naked on any non-bedroom furniture.
Sex had quickly became the exception to that rule. But Kacchan refused to allow any more (and if he or Eijiro wanted to cuddle afterwards, sex had to be a bed or nest thing only, or else Kacchan would clean whatever thing they defiled before cuddling)
(But sometimes Kacchan wouldn’t put his clothes back on before cleaning, so that was always a nice view.)
Izuku shook him from that particular train of thought before it affected his expression. It was good timing to return to the conversation too (when did he leave it?), as the assistant bowed. “I apologies for using my quirk on you without permission, sir!” The beta had his shoulders hiked up to his ears and his scent was sour with nerves.
“No, no, it’s alright! You didn’t hurt anything.” Izuku said, waving his hands. “I mean, you should always listen to your superiors, but nothing bad happened. So don’t feel too bad about it.”
The nurse sighed. “Deku, you have to go home-”
“See? I get to go home for- ...uh, how long?” He asked the nurse sheepishly.
She raised an eyebrow, “At least four days, if not a week.” She sighed.
“There you go. I get to go home for four days and one of my mates is going to be home all day tomorrow too. So, I can spend some time with him.”
The nurse frowned and pointed to the folder in Izuku’s hands. “I need you to read that. You may need your pack to be present if you have any side effects that aren't manageable by yourself.”
Izuku nodded. “So, I can get going?” He asked, smiling at the assistant as he straightened up and looked relieved that Izuku wasn’t upset with him.
“Yes, just fill out some papers at the front desk. Then go straight home. Understand?” She narrowed her eyes at Izuku, scowling even as he nodded. She turned a glare at her assistant. “And you are going to be explaining this to some people.” She huffed, then spun on her heel, and walked out of the room. The assistant apologized again before scurrying after her.
Izuku hopped off the exam table and closed the door after he couldn’t hear their footsteps in the hallway. Since he was going home, he needed to change his clothes. Probably call someone to come pick him up as well. Maybe Todoroki? He was pretty sure he was off work today, and the omega was probably bored.
Izuku stuffed the medical folder into his bag, deciding to read it in the car or something; if there was going to be a problem, the nurse would’ve told him.
And he wasn’t sure if it was a side effect starting already, or just his imagination, but the sterile scent of the hospital was starting to irritate him more than usual and he really just wanted to leave. It felt like even his bones were itching to get away from the noise and smells.
“I bet he wasn’t supposed to be using his quirk on pros yet. Or maybe he hasn’t had enough training to be cleared for anything serious.” Izuku muttered while he swapped his suit for a hoodie and face mask, wondering why the nurse had been so grumpy. “Well, it wasn’t that bad. It was just a paralytic.”
The villain Deku had gone up against had a scorpion tail that only contained a paralyzing effect if struck, but it could cause difficulty breathing, so the doctors had decided to use a poison removal quirk. Well, it was more of a foreign particle remover, if Izuku remembered correctly.
Those types of quirks were popular in medical fields since it could draw out drugs or poison or any kind of foreign body but weren't useful for things like cancers or anything that the body produced naturally.
There was probably more detailed information on the assistant’s quirk in the folder. And why he hadn’t been directed to use it too. Izuku could look into it later.
Or Kacchan would, he liked staying informed of anything that happened to Eijiro or Izuku when they got in a fight.
This poisoning actually came from a villain attacking a cafe during his lunch break and Izuku decided to intervene. U.A. had already called a substitute for Izuku’s class, and it wasn’t Aizawa for once.
His old teacher and Kacchan regularly ganged up on him when he did something “reckless” or “stupid.”
At least Eijiro was in the same boat between Kacchan and Mina.
‘Maybe Kacchan deserved someone to tell him off for being reckless too ’ Izuku mused, pulling out his phone to call Shouto.
...
Thanks again for picking me up.” Izuku said, sliding out of Shouto’s car. The omega had been more than happy to get out of his house for a little while; he had broken some ribs and they had healed incorrectly at first, so he was ordered home for a week until the healers could try again.
Izuku did want to invite Shouto to come inside. They could watch TV or play a game, and it would be smart to have someone to keep an eye on him, in case a severe side effect happened.
It was the smart thing to do.
The responsible thing.
Izuku waved Shouto off anyway, promising he could come over that weekend and eat some of Kacchan’s cooking. He and Eijiro could watch that drama they had been talking about too.
Izuku hurried inside before Shouto’s car was even out of sight, not noticing the glance Shouto gave him in the rearview mirror.
Shouto’s scent, combined with what lingered from the hospital, was driving Izuku nuts. It was wrong and once he was inside, he hated that it was even near his nest.
He tugged his shoes off, ignoring the slippers at the door, and shed his clothes as he scurried towards the bathroom. The room smelled heavily of himself and his mates, but also too much of their soaps and Eijiro’s hair dye. It made Izuku want to scrub the walls and not touch anything.
He was aware that he was spiraling; on the ride over, Shouto’s cream and mint scent suddenly started bothering him to the point he almost picked a hole in the side of the leather car seat out of anxiety.
It had only gotten worse as the traffic held them up from getting to Izuku’s house; he barely restrained himself from leaping out of the moving car by burying his nose in his hoodie that he had stolen from one of his mates. None of their clothes were just theirs anymore though.
Except maybe for the collectible ones, but no one wore those.
But Izuku would be okay if he took a shower, as long as he could get all of it off-
He relaxed under the spray, just to freeze as something warm and slimy slid down his thigh.
Tentatively probing behind him, Izuku confirmed it was slick. His heat wasn’t due for another few weeks, but the churning in his gut that he had brushed off as nerves and the liquid seeping out of his ass told him differently.
Was this a side effect? Probably. Maybe he should call someone...but Kacchan had a meeting and would be stuck there until late at night, so he’d likely sleep there.
And Eijiro had paperwork to do before he could come home, but that was this evening, and he had worked a bunch of shifts lately, so he was going to be tired...
Izuku halfheartedly thought about what he should be doing as he scrubbed himself with Eijiro’s scratchy loofa. His skin was pink and wonderfully scentless when he stepped out of the shower.
He slid on some heat-underwear and skipped a pad for the slick; he’d just chafe after a while. “I’ll just take it off anyway.” He muttered as his cramping in his stomach was tempered with his dick starting to swell, the friction of the underwear sending little jolts of pleasure up his spine, worsened by the slick leaking upwards and smoothing the glide.
He avoided touching any of the clothes he had tossed aside earlier, hopping around them as he made his way into the bedroom and flopped down in his nest. The shower had cleared his head a little, but he could feel the fog creeping back in.
At this point in his heat, Izuku would usually just want to fix his nest. Probably steal some clothes (not the collectibles...but those didn’t have any scent anyway. If he had any in his nest, that was his business and his alone), but the empty feeling in his gut and the heat in his pants was too aggressive to ignore.
He pulled out the bottom drawer of the side table, picking out a toy with a knot and ignoring the lube. His fingers really wouldn’t do much. Eijiro’s would though, his fingers were thick and curved just right.
Izuku shimmied off his underwear and kneeled to slide the dildo in. He sat down on it, barely rising up before bottoming out completely, not giving himself time to adjust.
‘Really didn't need lube’ he thought, panting as he felt the slick drip down his legs.
He squeezed the silicon knot past his rim, griding down on it and working his fist over his cock. He imagined it was Eijiro’s dick he was riding and replaced the image of his own fist with Kacchan’s. The two alphas urging him over the edge.
Maybe he could call one of them, at least he’d have their voice.
He had the faint recollection that he had left his phone somewhere, but he didn’t have the will to go find out where.
He leaned forward and shoved his face into one of the used sweaters in the nest, inhaling his mates’ scents and practically humping into the sheets, imagining his mates holding him down-
Izuku hissed in frustration when dildo slipped out as he leaned too far forward.
It was going to be a long couple of hours.
.....
“Hello?”
“Katsuki?”
“Icyhot, you’re the one that called my fucking number, who else do you think this is?”
“Kirishima and Izuku answer your phone often.” Shouto defended himself, frowning at the traffic he was stuck in.
“They don’t even sound like me- Never mind. What the fuck do you want?”
“I dropped Izuku off at home, and he was acting weird. Very spacy.”
Shouto could almost feel the protective shift in Katsuki from the other end of the phone.
“Was he hurt from the villain at the cafe?”
“No, I don’t think so. He was discharged quickly. When he first got in the car, he said something about the doctors wanting him to go home, but he didn’t talk much after a while. He also forgot his phone.”
“Shit. Okay, I’ll call Eijiro to go home. I’ll get Kaminari to do his work or something. That fucker keeps slacking his papers to Mindfuck anyway...”
Shouto could hear Katsuki muttering to himself and then barked something at a person else. Probably an intern.
“Okay you little shit, explain to me why can’t you turn around and keep an eye on him? You’re obviously worried if you’re calling me just to say Deku is acting weird.”
“I’m stuck in traffic.” Shouto gestured to the stopped cars around him, even though Katsuki couldn’t see.
“Why am I even friends with you.”
“I-”
“I said friends to get my point across. It doesn’t fucking count.”
Shouto smiled to himself as the phone rudely clicked off. He enjoyed being best friends with two people who were also together. It made hanging out even more fun.
He just needed to spend more time with Kirishima and raise him from ‘friend’ to ‘best friend.’
...
“Izuku?” Eijiro called as he opened the door. No one replied as he closed the door behind him. Katsuki had called him and said he’d get the paperwork done if he checked on Izuku.
Eijiro would've checked on their mate regardless, but he wasn’t about to say no to Katsuki doing his paperwork. The blond was a lot faster than he was.
They had both assumed that he might be sick or maybe dropping, based on what Todoroki had told Katsuki. The blond alpha had also called the hospital Izuku had been taken to after his run-in with the villain, but the line had been busy and when Katsuki had finally gotten ahold of a person, they said to just look at the omega’s file and hung up on him.
Katsuki was definitely going to tear into someone for that after he finished Eijiro’s paperwork. Probably before.
But Eijiro got to go home and take care of his (possibly) sick omega instead of sitting at a desk and doing reports. The only thing that could make this better was if there wasn't anything wrong with Izuku and he genuinely had just forgotten his phone in Todoroki’s car.
The only thing that would tear Katsuki away from his work and getting to yell at Izuku’s doctors would be if something was seriously wrong with Izuku, and that wasn’t ideal.
The hope that izuku was taking a just taking a nap flew out the window as Eijiro approached their bedroom. He could Izuku whimpering in a familiar way, and the scent of arousal that thickened as he approached the door had a tinge of something sour; like stress.
Eijiro had smelled it only when someone had done something wrong during sex, or the few times Izuku’s heat had caught him off guard and he had been alone for too long.
But if Izuku had started his heat, even suddenly, he would have only been alone for maybe two hours. And the scent didn’t smell nearly as sweet as his heat-scent did. It smelled more like he was in pre-heat.
“Izuku?” Eijiro asked softly, slowly opening the door and freezing when the omega growled lowly from the corner of the room. Eijiro closed the door behind him and walked around the nest so he could see the omega.
Izuku stopped snarling as soon as Eijiro came into view. His pupils blown wide and face flushed as he wiggled back and forth on the floor. Eijiro could hear a wet squelching sound as Izuku panted.
“Hey baby.” Eijiro purred crouching in front of the omega and rubbing the sides of his neck with both wrists to scent him. Izuku rested his head on Ejiro’s chest, groaning and grinding down on what Eijiro assumed to be one of his heat toys.
Eijiro let him pant on his chest as he stilled, leaning heavily into the alpha and going limp after a few seconds.
“You have fun?” Izuku swatted his knee weakly. Eijiro chuckled but noted Izuku was at least mostly non-verbal at the moment, when he usually gained at least a little coherency after he came.
“Yeah, I know.” Eijiro nodded as the omega clung to his shirt, hissing in displeasure when Eijiro tried to sit him up a little. “Let's go get something together, yeah?”
They had emergency suppressants that he knew Izuku probably hadn’t taken yet, but the omega would need to eat something, or they’d just make him sick and miserable, instead of the current horny and just a little miserable that he was now.
He stood up, peeling Izuku’s hands off as the omega tried to pull him back onto the floor with a frustrated whine.
“Alright baby, hold on.” Eijiro pulled Izuku to his feet and hoisted him up on his hip before his legs gave out, grabbing the dildo as well.
He slid the abandoned toy back inside the omega, noting just how wet Izuku was. He whimpered as Eijiro popped the fake knot inside too quickly, grinding on the alpha’s waist as best he could.
Eijiro rocked it shallowly in and out of Izuku to keep him sated as he carefully walked to the kitchen. The omega hissing when he couldn't get his mate to go any faster.
This was the main reason Eijiro worked out so much, he needed to be able to carry his mates.
But as much as it pained him, Eijiro needed to get some food into Izuku and couldn't walk faster unless he wanted to risk dropping him. Which meant he couldn’t fuck him very well at this angle.
They made it to the kitchen, and Eijiro sat him on the- ‘Katsuki is going to kill them both’ He thought distantly, watching a dribble of slick leak onto the counter from under Izuku’s thigh.
Eijiro shook his head, trying to clear the thoughts and some of the heat scent from his mind.
He pulled a slice of cheese from the fridge and offered it to Izuku, pulling him flush to his front and rubbing the crease of his thigh to tempt him into taking at least a nibble if it meant he could get what he wanted.
Izuku hissed and, instead of sliding off the counter or even just grabbing his dick like Eijiro assumed, he sunk his teeth into Eijiro’s neck.
Hard.
Eijiro inhaled sharply, grabbing the counter as his knees threatened to buckle. Izuku kept his teeth in his alpha’s neck, his fangs laying a fresh mark over the already healed mating bite.
“Honey, I- shit - please just take a bi- mhf -” Eijiro pleaded, not stopping izuku as he let go of his neck and pressed his teeth to the front of Eijiro’s throat. Not biting down, but as a threat? Maybe?
All Eijiro knew was Izuku’s scent had gotten sweeter with heat scent and the sour stress smell had faded to something barely noticeable.
Izuku grabbed the front of his jeans and fussed with the belt buckle, trying to free the erection Eijiro had been sporting since he opened the bedroom door.
Eijiro reached for the slice of cheese he dropped on the counter and froze when Izuku growled lowly at him, jerking his belt demandingly and wiggling impatiently on the counter.
Eijiro debated his choices for only a moment and figured Izuku would be more open to actually taking medicine if he was satisfied.
Izuku purred as Eijiro undid the belt himself, the omega barely letting him shove his pants past his hips before wrapping his legs around Eijiro’s waist to cage him in.
He whimpered as Eijiro pumped the dildo back inside him a few times before pulling it out and letting it fall to the floor with a wet splat.
He barely got his dick inside Izuku’s hole (god damn, how was he not dehydrated?? Eijiro needed to ask later. Was it an OFA thing?) before Izuku tightened his legs around his waist and clawed at his shoulders.
He pushed Izuku against the counter more, one hand on the omega and the other one the other side of the countertop as he fucked into him.
They did not need a repeat of that one time they slipped off the counter.
Izuku gasped under him, warm and tight and slick. His cock pressed between them throbbed, and it didn’t take much for him to shudder under Eijiro and tense around the alpha.
Eijiro ground his cock into Izuku as his knot swelled. He grabbed onto Izuku’s hips with both hands and humped a few more times until he came with a groan, knot unable to pull out anymore.
Izuku purred, dazed. He ghosted a hand over his half-hard cock and reached down to feel where they were tied, wiggling with a pleased look on his face as Eijiro shivered at the movement.
Both he and Katsuki were very pleased by the fact Eijiro was thick and big in more than one way. Although Izuku and Katsuki had both switched with Eijiro, neither could match him in size. But he did know what it felt like to be plugged up and full.
Katsuki refused to take his knot though, and sometimes Izuku struggled with it outside of his heats. So Eijiro wasn’t exactly sure what the omega was feeling right now.
He rocked into Izuku, satisfied by the breathy moan he worked out of him as he rubbed against the sweet spot inside the omega. Izuku gave a full-body shiver, his cock attempting a twitch, but both Izuku and his dick stayed mostly limp under Eijiro, splayed out on the counter.
Hopefully he'd accept a snack now.
Or at least some water.
...
“Ei? Izuku?” Katsuki called, locking the front door behind him. Eijiro had gotten home a while before him, and it was late. But Katsuki had been able to pawn off most of the paperwork onto Pikachu (who’d pass it on to Mindfuck) and reschedule the ass chewing he had in plan for Izuku’s doctor for tomorrow so he could come home early.
This was because when he texted Eijiro if everything was alright, all his mate had sent back was a fucking thumbs up emoji.
He really wasn't sure why he married the dumbass.
And Izuku too, for that matter. Who tries to arrest people when you’re on your lunch break? An idiot, that's who.
He glared at the abandoned dildo on the kitchen floor, but didn’t stop, determined to find his idiots. He’d clean it later.
“Fucking in my kitchen, so help me..” He muttered quietly, noting the abandoned clothes littering the hallway and shed his own shirt and pants to the floor, perking up at the noises coming from their bedroom.
“Dude, help,” Eijiro whined as he finally poked his head into the bedroom. “My dick is raw .”
Katsuki barely held back from laughing. Izuku had Eijiro on his back and was riding him for all he was worth, the alpha’s hands pinned above his head and looking completely wrung out.
Izuku perked up, looking over his shoulder and wiggled his hips on Eijiro’s cock, making him grunt. “Kacchan.” He rasped, whining as he glanced between him and Eijiro. Probably trying to decide whether to keep riding the life out of Eijiro, who was letting out little pained whines with his moans and tears gathering in his eyes from overstimulation, or to get off Eijiro’s knot and get Katsuki to fuck him.
Katsuki made the decision for him, kneeling behind the omega and pulling at his waist to get him off of Eijiro. The red-haired alpha’s half swollen knot slid out of Izuku with a tug they both hissed at, Izuku hissing more in irritation that he was being deprived of something inside him.
He shoved him down as Izuku tried to turn and snap his teeth at him, laying him on his front beside Eijiro.
“What the fuck happened to your neck?” Katsuki questioned, stripping his own boxers off and realizing Eijiro’s neck wasn’t just marked up, it looked halfway mauled. Little teeth marks and fresh bruising went up to his jaw and past his chest. The other alpha looked pleased with it though.
“I tried to put my jacket on him earlier to calm him down,” He mumbled, sitting up with a wince and running his finger through Izuku’s hair while Katsuki had him pinned. “And he kind of just freaked out. A couple of fans hugged me today and I think he could smell it.
Katsuki nodded, rolling his eyes. Izuku was a possessive little fucker, he really wasn't sure why everyone was always so confused when they found out.
The first time Dunce Face tried to hug Eijiro after he and Izuku had mated, Izuku outright hissed at the blond omega. Izuku looking so murderous with Black Whip creeping along the floor was apparently surprising.
Idiots.
Katsuki ignored Eijiro’s admonishing ‘ Don’t roll your eyes, you’re just as bad.’ and slid three fingers into Izuku. Something curled tight and hot in his core at how wet Izuku was, both from his slick and Eijiro’s cum. It was dripping down his thighs.
Izuku whimpered and then gasped as Katsuki pulled his fingers out and slid into Izuku with one thrust, pressing his hips flush and laying over top of the omega, pressing him into the mattress.
Katsuki huffed, reaching under Izuku and grabbing his cock. He stroked him in time to his thrusts, making Izuku bite down on a pillow with a strangled moan.
Katsuki bit down on the scar where Izuku’s neck and shoulder met. He glanced up when he felt Eijiro move closer and realized he had started playing with Izuku’s nipples.
Izuku writhed underneath them, not being able to know how or if he should move away or toward the hands.
He stiffened suddenly, clenching down on Katsuki with a breathy groan as the alpha refused to let go of his neck, teeth digging just shy of drawing blood.
He must’ve already been close when Katsuki walked in.
“Mhm, ah, Eiji- Eijiro- ” Izuku gasped as Eijiro took over stroking the omega’s cock and Katsuki gripped the omega’s hair with one hand and fucked into him harder, growling lowly.
Eijiro just smiled, pumping Izuku's cock as well as he could with an awkward angle. “You can give us one more, can’t you baby? You’re doing so well, sweetheart.” He purred as Katsuki slowed just long enough to sink his teeth into the other side of Izuku's neck, making the omega shake.
“C’mon, Izuku-” Katsuki rumbled against his neck, panting. “You wanted to come so badly before.” He shoved Izuku’s rear higher, and the omega choked on his moan as Katsuki started hitting that sweet spot on every thrust. “Be a- mhm- good boy and come for us.”
Katsuki bit down again, harder this time, as Izuku tightened around him a second time. The omega letting out a gasping noise like the air had been punched out of him as Katsuki ground his knot inside him.
His cock twitched in Eijiro’s hand but didn’t produce anything. Eijiro had fucked that out of him a while ago. The alpha released his cock as Katsuki gave a final stuttering few thrusts, groaning as he came and Izuku’s eyes watered from overstimulation.
Katsuki slumped over top of Izuku, breathing heavily as Izuku went boneless beneath him. Eijiro brushed his hair out of his eyes, Izuku looking blearily at him and completely pleased with himself.
“Feel good?” He asked, rubbing his thumb into the mark Katsuki left. Izuku shuttered with a stuttering purr, and Katsuki gave a choked groan as Izuku clenched around him.
“Fuckin’ warn me, Ei.” Katsuki hissed, his hands flexing in the sheets. He looked up at Eijiro and glared at him. “Smug bastard.” He muttered as Eijiro snorted and leaned in to kiss him. Katsuki rolled his eyes but kissed back, sighing into it.
The blond alpha pulled away first, albeit reluctantly. He knew Izuku liked being squished, but he was crushing the omega.
“He talk any?” Katsuki rasped, rolling himself and Izuku onto their sides and cuddled into him.
“Kinda, mostly just noises. I got a suppressant into him, but it didn’t work.” Eijiro admitted as he curled around Izuku’s front and kissed his forehead. The omega hummed sleepily, ghosting his fingers over the bite marks he left on Eijiro's chest. “I’m glad he doesn’t have my teeth.” Eijiro whispered, blushing.
“ Insatiable little shit.” Katsuki muttered, kissing the freckles on Izuku’s shoulder softly. “Why didn’t you call me?” He asked Eijiro, relaxing into the nest as Izuku’s breathing softened with sleep.
Usually, alphas could keep up with their omegas in heat, but only if they had a pre-heat scent. It’d cause them to go into a gentler sympathy rut. And the same went for omegas who had an alpha partner in rut.
So even if Izuku had started going into heat as soon as he got attacked, it wouldn’t have been enough time for Eijiro’s body to adjust and keep up with the omega’s demands.
As seen with the apparent ‘sore dick.’
“Couldn’t get away from him and find my phone.” Eijiro mumbled sleepily. He had just done two shifts back-to-back and now that Izuku wasn't asking to be fucked and Katsuki was here to watch out for them, he could feel the exhaustion catching up to him. “Kept thinking the pills would work too...” he trailed off with a yawn, closing his eyes as he cuddled close enough that he could lay his arm over both of them.
Katsuki hummed quietly, letting him fall asleep without comment. He started thinking of how exactly he could get those doctors fired, because apparently Izuku’s file all but screamed that he would go into a sudden heat, and that obviously hadn’t been explained to him.
Izuku mumbled something in his sleep as Katsuki's scent became a little bitter with anger, so he switched his thoughts to something else while he waited for himself to doze off.
Maybe how to thank Icyhot for snooping through Izuku's medical file while he was bored at home and then called Katsuki with what he found.
...Nah.