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May-December

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"Be a good brat, you little shit."

Izuku stiffled a giggle when the boy rolled his eyes. Still, Katsuki faced the impending forehead kiss from Mitsuki with as much dignity a six-year-old could carry. It was a double date night for their parents, to celebrate the rare times that Hisashi was present in the country. Izuku didn't mind, since his mom would be glowing with happiness for the next day after tonight.

"Bye, auntie." The woman grinned at Izuku and gave Katsuki one last swat at the back of the head before leaving. Izuku made sure to lock the double doors, and then turned to his charge with a large grin.

It was just Izuku and Katsuki now.

Katsuki was gripping an All Might action figure in one hand and an Endeavor figure on the other. His brows were scrunched together into something fierce, and there was a strange intensity in his bright red eyes.

It unnerved Izuku a little bit, but he quickly brushed it off as something like curiosity. Probably.

“So, what do you want for dinner, Kacchan?” The sixteen-year old leaned down, meeting Katsuki’s gaze. “There’s still curry. But if you don’t feel like it, your mom said we could get some take out.”

Katsuki was silent, staring as long as intently as possible at Izuku. It looked like he wasn’t even blinking, and it was getting the teenager a little worried.

It took Katsuki some time to recognize him, only remembering Izuku when the teen mentioned the blonde used to call him deku at four. Probably because he doesn’t remember the times Izuku visited before starting middle school. He used to visit a lot during his elementary years, but as Izuku strove to get to UA – well, that meant more time spent on studying.

Sure, Izuku was quirkless beta and had long given up on his dreams of becoming a Pro-Hero, but that doesn’t mean he can’t help people in some capacity. Besides, getting accepted into UA’s Gen Ed meant a lot of opportunities of getting into a good college, which also meant a lot of opportunities and places where Izuku could help people.

“Curry’s okay.” Izuku blinked, Katsuki’s tiny voice bringing him out of his reverie. He grinned at the boy, who nodded like having curry for dinner was a fact of life.

“Great, come on. Let’s eat, Kacchan!” The beta began padding to the kitchen when he felt Katsuki’s tiny hand grab onto his pant leg that almost sent him tripping into the wooden floors. Izuku slowed down and patted the explosive head of blond, amused as Katsuki tried swatting it away.

Mitsuki-san’s curry was perfectly seasoned, and the spice was strong enough to give a kick but not burn. Izuku barely finished his plate when Katsuki poked him for seconds. By the time the beta teen was washing his dirty dishes, Katsuki was already on his fourth plate.

Which was a little worrying because what if Katsuki threw up? What if Katsuki ended up with an upset stomach? Or food poisoning! Was this normal for Katsuki? Should he call Mitsuki-san? But that would be disturbing their date night… but what if calling for an ambulance would worry her more? What should –

“Done.” Izuku took the plate and plastic chopsticks with a sheepish expression. Katsuki still had that too serious expression on his face, that the teen was genuinely worried his face would be stuck like that for the rest of his life.

With dinner done, dishes taken care of, and curry stored inside the fridge – it was just a matter of tiring Katsuki out for bed.

Which should be easy. It was a good thing Mitsuki-san mentioned that Katsuki loved All Might and that was why he bough a few DVDs and video games about the Number One Pro Hero. Getting Katsuki to chose what he wanted to watch wasn’t that hard either, he just went along with whatever Izuku suggested as good.

Izuku then found himself sitting leaning attentively on one side of the couch, Katsuki on the other, and a tray of popcorn and packets of fruit juices between them. Even if Izuku had seen this featurette tens of times ever since All Might debuted two years ago, he never got tired of watching it over and over again.

The volume wasn’t turned up that high so that in case Katsuki had questions, he wouldn’t miss it.

“All Might’s pretty cool,” the blond said right in the middle of the climax, eyes glued to the screen. The teen grinned at the awe he could see reflected there. Wasn’t Katsuki’s quirk ‘Explosion’? With a quirk like that, Izuku wouldn’t be surprised if the boy wanted to get into heroics. “I want to be like him!”

“I believe in you, Kacchan.” The beta then turned his attention back to the television when the blond nodded eagerly.

Half an hour later and All Might’s grinning face cheering the audience on, the movie ended and that was when Katsuki was beginning to yawn and rubbing his eyes.

“Want to watch another one?” Izuku stood up, dusting the imaginary dust from his clothes. Katsuki shook his head. “Okay, bed time then.”

When Izuku offered to help Katsuki bathe, the boy refused citing that he was a big boy now and not even his parents helped him anymore, which was fine with the teen. Same with brushing his teeth.

It was half past nine as the beta helped the blond get into All Might themed PJs before getting to bed.

“Hey, Deku-nii,” Katsuki murmured. His All Might blankets were up to his chin, and he was clutching a stuffed rabbit underneath it.

“Yes, Kacchan?”

“I’ll be the number one hero and we’ll get married together!”

What.

His silence must have soured the boy’s mood, because he was very much awake and no longer sleepy. The blond pushed the blankets off and scrambled to his feet, glaring at Izuku too seriously for it to be a joke. Well, it was a little hard taking Katsuki seriously since he was in All Might PJs standing on his All Might themed bed.

"What." Izuku said to the six-year old, who now had a faint dusting of pink on the boy's cheeks.

"I said, I'm going to be the number one hero and I'm going to marry you!" Katsuki declared with a determined glint and an expression far too serious for someone his age.

It was… kinda cute. Also, wow, it was a little flattering to be someone’s childhood crush.

"Oh, alright." Izuku found himself trying to stifle a giggle at Katsuki's promise. "I'll hold you to that, then, Kacchan."

The blond boy huffed, placed his hands on his hips in a gesture reminiscent of his mother. "You're not taking me seriously! I swear, I'm gonna make it fucking happen!"

"Kacchan! Swearing is bad!" Izuku scolded, but the smile threatening to overcome his face took away all the seriousness in his tone. "I know your mom likes to swear, but that doesn't mean you have to."

"You have to promise not to marry anyone because I'm going to be your husband!"

Izuku couldn't help it. Katsuki's just adorable with his childhood crush. Eventually, the boy will probably grow out of it and would start dating a classmate or someone close to his age once he reached the time when he's curious enoguh about sex and romance.

"Okay, I promise." Izuku blinked when Katsuki nearly punched him when he thrust his hand forward, waiting for Izuku to shake it.

"You promise? Cross your heart and hope to die?" Katsuki's scowl was impressive, but the baby fat and smushed cheeks just made him adorable.

"Stick a needle in my eye," Izuku agreed with faux seriousness and shook the boy's hand. For a kid, Katsuki sure has a surprisingly strong grip.

"I'll be the number one hero and Deku will be my wife!"

Izuku choked.

 


 

 

Cram school was a special kind of hell.

This wasn’t Izuku’s first cram school; but preparing for college was another kind of evil entirely different back when he was in elementary and middle school. Preparing for UA was difficult and nightmarish; but it had nothing on preparing for Med school.

He still babysat Katsuki-kun, just… not all the time. Cram school was difficult and as the school year passed by, babysitting the blond boy became rarer and rarer to the point that the teen only saw Katsuki-kun once a month.

Hell, it even felt like Izuku saw his parents once a month.

Hisashi still visited every now and then, and often tried to stay as long as possible during the summers and winters. Izuku tried not to feel guilty for his dad having to take up more responsibilities just to support his schooling in UA, but he really couldn’t help it. More responsibilities meant less time spent talking over Skype or vacations.

Then there was cram school.

Even if Izuku hated it, he had to do more than better so that he could at least find a career option that paid high enough so that his dad wouldn’t have to work abroad anymore. He just had to grin and bear it.

Except, he couldn’t exactly.

Because he was going to be late.

All because he forgot his work book at home, had to get it back, and was now running to the building and apologizing profusely to anyone he bumped into. It was pretty embarrassing, but Izuku had no time and he –

Just crashed into someone.

“Sorry! Sorry!” Izuku went on, picking up his books, panicking because he only had two minutes left before classes began. He really wanted to stay longer and apologize, but he already had his things stacked haphazardly around his arms before he took off running.

“Come back here you dickwad!” More curses followed. A quick glance and Izuku stumbled when he found himself staring at a taller teen with spiky blond hair and purple eyes. “You better get me another unicorn frappe, or I’ll punch you in the fucking nuts!”

“Eight pm!” Izuku winced, but that was probably the least he can do to make it up to the poor soul. “Cram school!”

“You fucking better!” Came the angry reply, and the teen could only heave a sigh of relief as he finally entered the building. “I’ll be waiting you dickwad!”

It was hard concentrating during class, as Izuku’s mind drifted back to the blond with a sweet tooth and a foul mouth, wondering if he would really wait for Izuku outside just for another serving of the rainbow-colored drink. Of course, the beta would have preferred that the guy decided it wasn’t worth his time and left instead.

The teen really tried concentrating in class, but the whole incident won’t stop bugging him. He practically flew out of seat once cram school finished, and Izuku had to shyly wave a few of his cram buddies off just to check if the other teen would really be waiting outside.

“Hey! You’re two minutes late!”

So much for wishing him gone.

“Hi,” Izuku greeted, scratching at the back of his neck. “We just finished – so uh, hi! Sorry about that, I didn’t mean to bump into you and there’s a Starbucks down the street...”

“Fine.” The stranger rolled his eyes.

“Great!” Izuku tried to laugh it off, but it came off as nervous coughing. “I’m Midoriya Izuku.”

“Tch. Akatani Kumori.”

 


 

 

“Do you have your pencils?”

“Yes, dad.”

“Eraser?”

“Uhuh.”

“Notebooks? ID? Hat? Ne, Mi-chan, do you – “

“Dad, I’m going to be fine.”

Mikumo rolled his eyes as Izuku continued to fuss over him. Izuku couldn’t help it.

“Alright, but be careful, okay?”

“Sure thing, dad.” Izuku grinned and pressed a kiss on Mikumo’s forehead. His son swatted him away, embarrassed at any sort of affection – even at home. “Bye.”

“Bye!” One last kiss to the forehead, and Izuku let go. Mikumo rushed away, nearly tripping on the genkan, before heading out the door.

With Mikumo gone, it was time for Izuku to work.

Technically, he was on the last day of his two-week leave, and there were still a lot of things he needed to do in their new house.

A two-storey house was big for a single father and his son, and there was the issue of bigger bills – but this house was closer to work and was miles better than his old rundown studio at the shadier parts of town.

And it’s safer for Mikumo, which was why Izuku wasn’t really complaining much.

There were still a few unopened boxes in their living room – clothes, books, and various toys – and Izuku had yet to take care of those.

Bracing himself for a busy day ahead of him, Izuku padded back to the living room.

Sorting through the boxes and storing their contents took longer than Izuku expected it to be. And rather tiring too. Running up and down to gather the boxes had him winded after two hours, and he had to take a short break before continuing.

Hours passed and Izuku finally slumped down in the living room couch, a pitcher of lemonade and a slice of strawberry shortcake on the coffee table, and all the empty boxes already stacked and hidden in the broom closet for future use.

The house smelled new and of pot roast Izuku put in the slow cooker. It was a little quaint and rather cosy, trinkets and other projects lining all surfaces.

Save for one area.

Taking a deep breath, Izuku turned to the alter placed unobtrusively at the farthest corner of the living room. Akatani Kumori’s portrait grinned mischievously, startlingly bright against the dark frame and black ribbon –  a splash of life where there’s otherwise none.

“Hey, we made it.” Izuku smiled gently at the still image, can still feel pangs of grief lodged deep in his chest. It’s been six years, some of the pain had dulled, but it was during moments like these when it felt fresh and sharp. “It’s Mi-chan’s first day in a new school, and he’s already independent. Won’t even let me tie his shoe laces or help him dress. Says he can do it all on his own.”

He let out a loud sigh, looking up at the ceiling. “I wish you were here to see him now, Kumo-chan.”

Izuku felt lost in that moment, unsure how to move forward, wondering if he was doing enough for Mikumo. Things were never easy to begin with, and it was at times like these that the beta felt overwhelmed. He was expecting things to become more difficult as Mikumo grew older, and it was hard to do what he can to protect his son without hovering too much.

The pitcher had a ring of moisture at its base, and Izuku should really get to it.

With another heavy sigh, the beta leaned forward and grabbed the plate and fork next to it. The strawberry shortcake was a house warming gift from his mom. She helped with moving in, and then played a little with Mikumo yesterday before going back to her apartment.

The shortcake tasted exactly like Izuku remembered it to be. Not too sweet, tart, and fresh.

Izuku was halfway through eating it when his phone began to vibrate inside his pocket.

Weird, the hospital knew he was coming back tomorrow so there was no reason for them to call. Couldn’t be his mom either, since she was at the Bakugou’s and were preparing dinner to welcome him and Mikumo back to the neighbourhood.

He grabbed the device and blinked.

It was Mikumo’s school.

Worried, Izuku answered.

“Good afternoon. I’m Sugita Shintaro, Mikumo-kun’s homeroom teacher.” Was what greeted Izuku right away. He blinked. “Is this… Midoriya Izuku?”

“Yes, speaking. Is there something wrong?” The beta returned the plate back on the coffee table carefully before standing up. Did something happen in school? Right on Mikumo’s first day?

“There has been a situation, and your son was involved in a… disagreement. Oh – no need to worry! It’s nothing our school nurse couldn’t fix.” Still, Izuku couldn’t find himself sighing in relief. He needed to see Mikumo for himself just to be sure. “He isn’t in trouble, but we would still like to speak to you.”

“Alright, I’ll be there in a few. Thank you for informing me.”

“Apologies for the inconvenience, Midoriya-san – and thank you for taking the time to listen.”

Then the call ended.

Anxious, Izuku rushed to his bathroom to take a quick shower. Wouldn’t do talking to Mikumo’s teacher smelling like sweat.

Mikumo’s school was just fifteen minutes away by foot. Izuku made it in ten.

It was a regular run of the mill public school, with an enormous campus for middle school and high school, and various areas for different sports and clubs. It wasn’t hard finding the elementary department building, and Izuku was practically rushing to where he guessed Mikumo’s classroom was supposed to be.

Izuku used to be a student here, and he was glad that nothing changed much for the last twenty years.

The man breathed a sigh of relief when he saw Mikumo’s classroom, slowing down as he neared.

Then froze.

“Deku-nii?”

Izuku’s mouth went dry. Katsuki’s voice was deeper and smoother, practically a purr. There was a wicked edge growing on his lips, and it sent a shiver straight to Izuku’s spine.

“Kacchan?”

At eighteen years old, Katsuki was already at Izuku’s height. His shirt hugged his sculpted body, sleeves clinging to his biceps and his trousers tight his powerful thighs.

‘Shit.’

Then a broad grin spread across the young man’s face, stalking forward like some sort of predator and Izuku was his hapless prey. A shudder ran down Izuku’s back.

“It’s been a long time, huh?” There was a strange glint in Katsuki’s red eyes that sent heat straight down to Izuku’s groin and – no! Bad Izuku! He’s not about to pop a boner right in the school where his son attended! “How are you doing, sensei?”

Izuku tried not to squirm. Even if his pants felt tight.

“You’re fine – I mean! Do m – I’m doing fine, Kacch – Katsuki-kun.” Fuck, wouldn’t do calling Katsuki by his old nickname. That would earn Izuku a lot of strange looks. “A little glad that Pros help in every way they can – gives us a lot less to worry about when we get the patients.”

Izuku was the adult here, but it certainly felt like Katsuki’s making fun of him. The little shit.

“So! What brings you here? Feeling a little nostalgic?” Izuku avoided the younger man’s gaze, too self-conscious and a little awkward. He was also a little intimidated by the blonde’s physique and wondering what it would feel like to run his hands over Katsuki’s toned pectora – No! Bad!

Before Katsuki could answer, the door to Mikumo’s classroom slid open. A middle-aged man coughed and then motioned for them to get in. “Ah, I was getting a little worried. You must be Midoriya-san.”

“Ah yes, I am. What happened?”

“It’s ah, a little complicated. Come in, you too, Bakugou-kun.”

The blond grunted, motioning for Izuku to come in first. The beta nodded and stepped inside.

There were a few changes to the classroom – newer desks, chalkboard, and AC unit. Other than that, it was the same classroom Izuku attended during his childhood.

At the very front was Mikumo, arms crossed and sulking. Next to him was probably Katsuki’s clone at six years old. Except, this mini Katsuki was chattering away a mile a minute with the sunniest grin on his face. Which was a little jarring since the Bakugou Katsuki in Izuku’s flashbacks was an angry and foul-mouthed delinquent that liked punching people.

It was mini-Katsuki that noticed them, his bright red eyes widening in delight. “Katsu-nii! Look! I made a friend! His name is Mikumo, but I call him Yamikumo cuz he’s like grumpier than a raincloud. And is that Yami-chan’s dad? Hi! I’m Natsuki!”

There was an ugly bruise forming in Natsuki’s cheek.

“Hey dad,” Mikumo grumbled, turning towards the door. Izuku was pretty sure he brushed his son’s mess of a hair over his forehead, so why was it covering one eye now? “Can we go home now? I’m getting pretty hungry.”

“Not yet, Mikumo-kun. I still need to talk to you and your father about a few things.” The teacher cleared his throat. “Natsuki-kun can go home.”

“Eh, it’s fine. These two are supposed to be at my parents’ house, we can wait.”

“Then I would like to ask the two of you two wait outside. This concerns Midoriya-san and Mikumo-kun only.”

“Tch. Fine. Come on, you little brat.” The smaller Bakugou made a happy noise and practically leapt out of his chair. He rushed towards Katsuki and began clinging to his leg.

“See ya later Yami-chan! You too, Yami-chan’s dad!”

Katsuki rolled his eyes and began marching away, easily lifting Natsuki without any hint of being bothered by the added weight. Izuku tried not to stare.

It felt too soon when Katsuki slid the door close, and the beta braced himself and turned towards his son’s teacher with a concerned smile. “What happened?”

At his periphery, Mikumo sunk lower in his seat.

“Midoriya-san, you do know how certain people of a certain… secondary gender behave, correct?” Mikumo’s teacher began as he sat down, resting his fingers on his chin. “Especially when it comes to a certain other gender?”

“Well… being vague hardly helps. I would prefer if this is about Mikumo being an alpha, I would rather that you would be straightforward in regards to this matter.” Izuku smiled blandly. “I’ve seen a lot of things, physiology and biology are hardly something to be shy about.”

“I see… well.” The other man cleared his throat. “See, Bakugou Natsuki-kun is an omega and well – he just presented a few weeks ago and had been the subject to some… unsavoury behaviour.”

Izuku frowned. “He’s being bullied. Or harassed? If that’s the case, then why is my son in trouble then?”

The man let out a light laugh. “I’m sorry, your son is hardly in trouble. In fact, we would like to apologize to you and Bakugou-kun for the inconvenience this has caused. We found your son defending Natsuki-kun from harassment, and the alphas involved were already suspended and have to undergo therapy to keep this from happening again…

“Alright, your son may be in a little trouble, but that is because he responded by using his quirk in public of getting a teacher or any other capable adult. We know that a lot of kids these days want to be Pro Heroes, but we can’t really condone that kind of behaviour. He has detention for the whole week.”

A slap on the wrist then. Izuku could live with that. It could be worse. Except, Izuku would have preferred that Mikumo didn’t get into trouble at all.

“Is that all, then?”

“Oh – there’s also the matter of your son’s records. There’s been a few issues with his old elementary and….”

 


 

 

Katsuki was looking forward to dinner that night.

After school, the alpha was quick to hit the showers and brushed his teeth twice to be sure. He also took care not to sweat on the band t-shirt that he knew accentuated all the good bits, and the jeans he got was designed and made by Best Jeanist. Sure, he hated the bastard for his elegant shit or whatever, but Katsuki had to admit – the man made some damn good jeans.

The hag asking him to pick Natsuki up was a little annoying, especially after everything Katsuki did to be as presentable as possible – but hey, if his little brother needs to be picked up from school, whatever. How that boy was a cheery ball of sunshine compared to the infernos that were Bakugou Mitsuki and Katsuki – Katsuki will never know.

The walk to Natsuki’s school didn’t take long, and Katsuki was pretty much steeling himself to face a bunch of shit-faced alphas. His brother just presented, and if he’s getting harassed – well, there was hell to pay.

Before he could even get in, a faint scent reached the blond – one he instinctively knew as beta – familiar and soothing, and that had him turning.

Katsuki froze for a millisecond, drinking in the sight of the boy – now a man – that used to babysit him when he was younger. A childhood crush that never faded away – in fact, it was something that grew deeper as Katsuki matured and grew older.

“Deku-nii?” And Katsuki wanted to slap himself. The first thing he does to show Deku – Izuku – that he had matured and was a far cry from the kid he used to babysit, was call Izuku the same childish nickname he used for years instead of using his actual name. Well, there was a first time for everything.

“Kacchan?”

Katsuki couldn’t stop frowning, but the hint of red that began from the tips of Izuku’s ears spreading to his neck had to mean something. He grinned.

Izuku flustered around, probably not realizing he was waving his arms around like a distressed chicken.

“It’s been a long time, huh?” Six years since they last saw each other. If Katsuki wasn’t mistaken, didn’t Izuku go to medical school? The beta was probably a doctor now. “How are you doing, sensei?”

For a twenty-eight-year-old man, Izuku was fucking adorable. He shifted on his feet, practically vibrating with energy.

If Izuku said anything else, it went in one ear and out the other. Katsuki practically paid no mind as Izuku began to chatter on. The alpha can only stare intently at the older man’s lips – they were a little dry, but not quite chapped. And was that cream at the corner of Izuku’s lips? Katsuki certainly wanted to lick it, find out what the older man tasted like.

His musings were cut off my Natsuki’s teacher opening the door and pretty much kicked his brother out. There was just one kid, and one sniff confirmed that the boy was alpha and… smelled like Izuku?

If Katsuki wasn’t mistaken… Well, he wasn’t, he checked Izuku’s social media, he knows that head of purple anywhere – that was definitely Mikumo. The brat looked a lot like his dad in a lot of places – similar hairstyle, freckles everywhere, soft cheeks – definitely Izuku’s kid.

Natsuki chattered on, even as his homeroom teacher kicked them out. Katsuki kept half an ear on Natsuki, and when he mentioned something about a bunch of alphas trying to pull his shirt off to see if they could get to his scent gland – that had Katsuki seeing red.

“– but then Yami-chan appeared and went whoosh!” Natsuki waved his arms around while doing jazz hands. “And they all flew away like paper! Turns out Yami-chan’s quirk is Push! He can push anything stuff away when it’s within the range of his arms when he pushes them – which he told me and it sounds hard, but cool! Kinda like Auntie Inko’s but goes the other way around and bigger!”

Well, that was good that Izuku’s son defended him. Except, Mikumo used a quirk in public – sure, laws were a little lighter now compared to before, but Mikumo’s probably still in trouble. “One of the meanies throw a rock at him though, but the nurse already put some cold stuff there and it’s looking better!”

“Ah.” Katsuki patted the tiny blond. “Now, I need to you to tell me the names and faces of the assholes that tried to bite you so that I could murder them and their parents.”

“No need, Katsuki-kun.” The alpha blinked. He didn’t even hear the door slide open. Izuku was smiling at him, all squinty and bright, and Katsuki could pretty much feel his knees going jelly at the intensity. “They’ve all been suspended and are supposed to attend mandatory therapy.”

Katsuki huffed out an annoyed breath. “Not good enough. Should be teaching these brats not to do that kind of thing in the first place.”

Izuku gave him a look that Katsuki translated he silently agreed, but probably let the matter drop. That and Katsuki was feeling smug and proud of himself for not cursing in front of Izuku’s son.

Said son was giving Katsuki rather… weird looks. It was definitely not a crush, but it wasn’t hostility either.

“So,” Izuku beamed, but he wasn’t looking at Katsuki. If anything, it looked like he was hiding his flustered face. “Shall we?”

The alpha smirked and slung an arm around the older man. Izuku actually “meeped”, proceeded to get redder. The older man was on the slim side, and about an inch or two shorter than Katsuki. In a few years, the blonde’s absolutely sure he’ll outgrow Izuku. “Sure. The hag and dad are dying to see you again, Izuku.”

Heat shot straight down to Katsuki’s groin when Izuku shivered. If saying Izuku’s name always got Katsuki this kind of reaction, well….

This was going to be a fun night.

Chapter Text

“Hi Masaru-jiji,” Mikumo murmured, hiding behind Izuku’s shirt. The beta patted the boy and gave the other adult a sheepish look.

“He’s a little shy.”

“It’s alright, Izu-kun! You used to be as shy when you were his age, it would take some getting used to.” The older man’s gaze then flitted to Natsuki, who was laughing excitedly atop Katsuki’s shoulders. “I’m glad that Kumo-chan is friends with Natsuki.”

“Yami-chan’s quirk is pretty cool! He could like use them to fan my explosions and we could make bigger ones!” Sparks formed around the six-year old’s hands, but Katsuki was quick to shush him.

“No quirks in public, brat.”

“But this is our house!”

“We’re not even inside yet!”

Izuku was smiling as he tried to help Mikumo take his shoes off, who swatted his hands and proceeded to get them off himself. The beta just let him, ruffling the boy’s hair as he did so. He made sure not to jostle Mikumo too much, making note to get ice for the black eye. Or a patch until it’s better.

“Inko’s setting up the table, we’re having curry and katsudon for dinner.” Mikumo’s eye widened and he ended up kicking his shoes off at that. Before he could rush in, Masaru put a hand over the boy’s shoulder. “Not yet, there’s a surprise for you and your dad.”

“Masaru-san, you shouldn’t have,” Izuku tittered as he toed his shoes off. The Bakugou brothers already had their shoes off and were barefooted as they stepped out of the genkan. Natsuki ran to the kitchen, while Katsuki followed at a more leisurely pace. “Mom already bought us cake yesterday.”

Looking at Masaru-san, Izuku found out that Katsuki did get a thing or two from his dad – but it was Masaru-san’s smile that stood out.

“You’ll see.”

A little antsy about surprises, Izuku and Mikumo exchanged looks before following the older man to the dining area.

Izuku felt his heart stop.

“Dad?” Holy fuck. “I – I thought you weren’t going to be home until winter!”

Hisashi smiled, shrugging. “I wanted it to be a surprise. I was promoted, actually – and I’m going to be stationed back here at home for a long time.”

“Is that… jiji?” Mikumo tugged at Izuku’s hand staring at Hisashi.

“Yeah, he is.” Izuku couldn’t stop the tears from falling as Hisashi approached him and gave him a tight hug. After a minute or two, he looked down and gave Mikumo a smile.

“Hi, Kumo-chan – you’ve grown a lot since our last video call! How are you doing?”

And that pretty much set the tone for dinner that night.

Izuku’s cheeks hurt with how much he was smiling and laughing. For the first time in a long time, his parents were together in one place and he’s surrounded by the people he loved most.

At that, his mind inevitably turned to Kumori, and Izuku desperately wished he was there with them right now.

Then, something touched his ankle.

The beta blinked. That was definitely a toe.

“Is there something wrong, Izuku?” Inko asked, concerned.

“Sorry, I thought something crawled up my foot. It was just my imagination,” he laughed sheepishly. Inko seemed to have accepted his explanation and resumed eating and talking.

From across the table, Izuku found himself staring at Katsuki’s intense red eyes. All the hairs at the back of his neck stood up as the younger man gave him a slow grin and proceeded to slowly nibble on a piece of pork between his chopsticks.

Izuku’s throat ran dry.

Coughing a little, he took a quick gulp of water and tried to concentrate on eating.

Except, he could feel the blond alpha’s gaze burning on him, watching his every move. He tried not to squirm or fidget, but it was difficult. He felt too aware of Katsuki’s gaze.

And the fact that he was ten years older than Katsuki.

Izuku nearly jumped in his seat when the pressure was back, pressing on his ankle.

This time around, it was Hisashi that asked him if there was something wrong, and Izuku half-heartedly tried to brush his concern off and said he was just thirsty.

The chatter drowned out his audible swallow as the pressure – the foot – slowly climbed up his calf. Izuku cursed himself for not wearing thicker trousers.

The beta tried concentrating on his meal, trying not to wiggle around on his seat as the foot reached Izuku’s knee before slowly tracing down. The contact sent jolts of electricity running up and down Izuku’s spine, his clothes suddenly constricting and sticky to his skin.

“Izukun, pass me the salt, please,” Masaru-san asked. Izuku nodded a little too eagerly and grabbed the shaker.

The foot pressed down on Izuku’s crotch.

Izuku’s knuckles were white and he could feel his nails digging into his palms as he passed the seasoning to the older man, smile a little shaky and trying hard not to pant in front of his parents. In front of the children.

He sent Katsuki a quick glare, who was smiling too smugly in Izuku’s opinion. There was a light flush to his cheeks, tongue swiping at his lower lip. There was another piece of pork pressed against his mouth, and Katsuki took his sweet time circling his tongue around the meat before popping it inside his mouth.

Izuku squirmed.

He wasn’t sure if he wanted his parents and Katsuki’s parents to notice what was happening, or if he was happy that they were oblivious to the miracles happening right beneath Mitsuki-san’s stylish table spread. He tried not to shift too much, even if he could feel the heat pooling in his belly and the heady sensation of doing something so… forbidden right in front of their family.

It was as thrilling as it was mortifying.

Katsuki’s foot groped around his inner thigh, toes brushing against the growing bulge in Izuku’s pants. There was cold sweat dripping down the back of Izuku’s neck, and he had to wonder why he didn’t just close his legs in the first place.

Instead of getting rid of Katsuki’s foot at his crotch, the blonde’s foot up to his calf was now stuck between Izuku’s thighs – and the entire length of Katsuki’s foot lay snug against Izuku’s half-hard cock.

Izuku also wanted to stab himself with his chopsticks, but he was already dying by choking on rice, so it was an acceptable alternative.

“I’m okay, I just swallowed too soon!” Izuku laughed after chugging half a pitcher of water. At the corner of his eyes, he could see Mikumo and Natsuki giggling a little. Laughing at someone while choking on food was definitely something to talk about with Mikumo later. “I’m fine!”

‘Just how long was this dinner going to last?’ Izuku thought in slight desperation, can feel his clothes sticking to his back and Katsuki’s foot now free from the confines of his thigh.

Katsuki didn’t move an inch.

The beta tried not to squirm, with Katsuki’s unmoving foot still on his lap. The beta’s back was rigid with anticipation, nerves overworked as the alpha didn’t seem to be making a move. At that point, Izuku wasn’t eating as he was shovelling the food inside his mouth – ready to flee at a moment’s notice.

This was one of the many times that Izuku’s beyond glad that whatever pheromone he released, absolutely no one would notice. Well, no one who wasn’t looking for it anyway.

Thankfully, someone out there decided to take pity on Izuku, and he can only sigh in relief as it seemed to be the perfect time to stop eating and move on to the living room for another kind of family-oriented activity.

Katsuki’s foot quickly removed his foot from between Izuku’s thighs, and the beta tried not to gasp or hiss in surprise at the sudden movement as it effectively killed his boner. It took another minute for Katsuki to compose himself, before standing up and complaining to Mitsuki-san that he already washed the dishes yesterday and why couldn’t the little brat help?

“It’s okay, Mitsuki-san! I’ll help clean up – it’s the least I could do for the food!” Izuku didn’t give her a chance to protest, as he quickly took the dishes in her hand and began cleaning up. She patted him on the hand and thanked him for being such a gentleman. “It’s no problem at all!”

“Help him will you, you lil shit!” Mitsuki flicked Katsuki on the ear, and Izuku could already feel something sinking in his gut.

The blond rolled his eyes, but the moment she was gone…. Izuku gulped. Everyone had migrated to the living room – even the kids.

“It’s just you and me, eh? Midoriya-sensei,” Katsuki purred. Izuku’s dick that had gone flaccid was now back on attention and straining against his underwear. Great.

‘He’s ten years younger than you Izuku, don’t even think about it!’ He reminded his traitorous dick, and then coughed as he escaped with a pile of dishes to the kitchen. Which was a bad idea, because that meant he was farther away from their families and that meant Katsuki’s more likely to pull something where there would be no witnesses.

Which reminded Izuku – why?

He could still remember Katsuki’s childhood crush, the beta had always thought it faded ever before Katsuki even finished first grade. Turned out he was wrong, then.

Which was also bewildering – just what did Katsuki see in Izuku even?

Izuku is a single father, quirkless beta, and ten years older than Katsuki – so, why?

“Oh, getting hard again, Izuku?” The beta almost dropped the dishes. He jumped right out of his skin, yelping as Katsuki easily caught him in arms and held the plates and other cutlery in their arms. Holy shit, Katsuki’s body pretty much a shit brick house and holy fuck that was definitely not a gun poking on Izuku’s ass.

That and did Katsuki just outgrew Izuku?!

Yep. Katsuki was at least an inch taller, and that was totally unfair!

That and he packed heat in every inch, especially in his arms, and holy shit his half-hard dick would have gone full mast had it not been trapped within the confines of his briefs.

“Hey, sensei–“ Katsuki’s breath brushed at the back of Izuku’s ear, the following shudder went straight to his cock. He tried shifting his legs, his dick was starting to ache and he could already feel sticky wetness trying to drip out from the tip. “I’ve been feeling weird down there, it might be prostate cancer, do you want to give it a check?”

And that killed Izuku’s boner. The beta couldn’t stop the bark of laughter, shoulders shaking with every chuckle and giggle. That was enough to have the alpha stepping out of Izuku’s personally bubble, and when Izuku took a glance – the blond was giving him these confused looks.

“Did you just lift that straight from a porno movie?”

Red colored the tips of Katsuki’s ears to his collarbone, his expression morphed from sultry and smug into something like evasive embarrassment.

“No,” Katsuki answered for it to be anything but a lie. “God fucking damn it, I thought it would work.”

Izuku snorted, but he did give some brownie points for effort.

… not that he was supposed to give them in the first place.

‘Eighteen and twenty-eight, remember? Oh god he’s legal but I used to babysit Katsuki-kun! I shouldn’t be thinking of him like this!’

“Come on, the food would start crusting on the plates.”

Izuku knew Katsuki rolled his eyes without looking behind him, and then proceeded to head to the kitchens with the plates divided evenly between the two of them.

 


 

 

“Want you so much….”

Izuku moaned as teeth nipped the junction between his collar and neck, hard bites that toed the line between pleasure and pain – almost like the claiming marks alphas gave omegas. He could feel hands roaming his naked chest, thumb brushing circular patterns just around his nipple but not quite touching them at all. The beta keened, back arching as he tried to get more of that contact – trying to get the finger to stroke the sensitive nub. It was almost ticklish, with the way the pad of the thumb pressing on the flesh of Izuku’s chest, rough and calloused and –

sweet.

His head felt hazy and light, and Izuku’s skin felt like it was on fire. Every inch of himself thrummed and throbbed with electricity, could feel his cock pulse and twitch with pleasure. Izuku let out a low moan when nails scrapped at his sensitive nipple, could feel both tingle with every motion.

Another hand began trailing down Izuku’s abdomen, featherlight and teasing. It ghosted over his stomach, tracing every contour and curve, pressing on the supple skin slick with sweat. The beta gasped breathlessly, the sound hitching in his throat as his toes curled. Dick twitching and straining, Izuku mewled lasciviously when both hands prssed deeper on his hypersensitive skin, sending jolts of electricity that let heat pool at the pit of his gut.

”Wanted you for so long.” Hot breath fanned at the back of Izuku’s air, could feel the cool sweat dripping down his neck. Izuku could feel it trail down his bare back, every drop and rivulet leaving a trail of cold that had his spine tingling as it disappeared in the crevice between the cheeks of his rear.

Izuku couldn’t speak, words far beyond him as he could only focus on the hot breath against his back and the hands exploring and teasing his chest and torso. Could feel the hand on his stomach trailing down, playing and brushing fingers across the dark trail of hair that led to his cock.

“Can’t wait to fuck you, make you moan and scream, bite you, make you mine,” the voice was sinfully smooth against Izuku’s ear, each syllable sent heat straight to Izuku’s cock – which for some reason, felt so confined and trapped.

The beta whimpered when the hand on his happy trail disappeared, hips jerking forward to get more of that delicious friction. He wanted to move his arms, but they felt like lead weighed them down. Izuku wanted to grab the hand back, but there was no need when he felt rough and calloused fingers grabbing his cock and then jerked.

Izuku’s hips snapped at the contact, moaning loudly as saliva dribbled down from the corner of his mouth and straight to his chest. The hand on his chest was still rolling and pinching his nipples – hard and peaky and tingling with every movement.

 “So wet for me,” the voice continued, raspy and deep and aroused. Izuku could feel the rumble of a hard chest pressing close on his back, bodies sliding against each other as every point of contact between their skin had Izuku trembling and sobbing from the furnace-like heat emanating from his partner. “Gonna make you cum, make you forgot your own name and all you can think about is me.

‘Please!’ Izuku wanted to say, but his tongue felt leaden inside his mouth. It was getting hard to tell what was up from down, couldn’t focus yet could only focus on the hands playing with every bit of sensitive skin.

Then the hand on his cock began to pump.

At first it was slow and sweet, each motion felt like the hand was moving through molasses, every drag and stroke had Izuku’s toes curling as sparks of pleasure echoed from his groin to his chest. It was a slow crawl that settled deep inside Izuku’s chest, warm and heavy as more moans spilled out of Izuku’s mouth.

“Yeah, just like that, sensei. You’re a fucking dirty old man, you’re really getting off on this.” A harsh jerk, and Izuku rolled his hips at the contact. Another moan dragged itself out of Izuku’s mouth as the hand on his cock began to speed up, calloused fingers and nails scrapping at the throbbing member was the weirdest sensation ever and yet Izuku kept thrusting forward, trying to match the hand’s increasing pace. The head was swollen and red, throbbing angrily as precum dripped down from the slit, veins pulsing with hot need.

“You fucking slut, Deku – “

Fuck.

Just like that, Izuku’s eyes snapped open.

 The first thing the beta became aware of was the near lack of sensation on both of his arms. His left arm was underneath something heavy and hard, and his other was curled right in front of him – pinned between his and –

‘Don’t move,’ Izuku’s brain warned. He could already feel his breath starting to pick up, and Izuku wasn’t going to risk looking down, knowing that between his legs was a canon ready to blow.

They weren’t exactly chest-to-back (yeah, no thanks to Izuku’s right arm – wait! No! Bad brain!) but the beta was all too aware of how close they are, that the slightest movement would have Izuku’s morning wood brushing against Katsuki’s ass.

A quick glance at his surroundings that Izuku realized that he was somewhere unfamiliar – or rather, somewhere distantly familiar. He hadn’t been in this place for six years.

The once pristine All Might posters were a little worn down now – there were newer posters, however, of other Pro Heroes and some bands here and there. There were still a lot of sharp objects present for Izuku’s comfort, and the most glaring was definitely the enormous bed that could probably fit five people that they were now lying down on.

Which bought Izuku to his next concern – escaping and pretending that nothing happened the night before after Izuku’s fifth shot. Before Izuku drank his first shot, the kids were already sleepy and tucked in Natsuki’s bed. Katsuki was surprisingly a lightweight. He expected the alpha to get shit-faced after the fifteenth shot or something, not before he even finished his first.

With deliberate slowness, the beta began trying to extract himself. First, he shifted on his back to minimize contact – and he had to wince with how obvious the bulge in his pants were – then he began inching away from the eighteen-year-old.

Izuku could still remember Katsuki draped all over him like a lazy cat, pliant and sensual and flushed far too close for comfort. There was a flash of memory of Katsuki’s shirt riding over his toned abs, the hint of wiry blond hair disappearing under his waistband. The alpha’s muscles tapered off into a narrow waist, his defined thighs just hugged in all the right places as the teen pretty much didn’t leave Izuku’s side once they had settled down in the living room with their parents in a gathering for just adults.

And that’s what Katsuki was, wasn’t he? An adult.

Except, Izuku could still see hints of that six-year old boy that he used to babysit, the same boy that promised to marry him when they were older. However, that boy wasn’t quite gone – rather, he grew up to be this fine young man who was physically perfect, and yet….

Rather hilarious in his own right.

Izuku couldn’t stop the snort when he remembered the hurricane of horrible pick-up lines that spewed from Katsuki’s mouth while Mitsuki-san cackled in the background, Masaru-san looking like a proud father, and his own parents looking far too amused than disturbed that their twenty-eight-year old son almost got a hand job courtesy of an eighteen-year old… boy? Man?

Either way, Izuku had no idea. That and Katsuki began to stir, grumbling in pain as he turned to face Izuku and –

‘Katsuki-kun! Why must you do this to me?’ Izuku screamed mentally as enormously strong arms pulled him close to a tight embrace, the blond nuzzling Izuku’s neck sleepily before his breath evened out into a deep sleep.

All the progress Izuku made in trying to escape was pretty much gone, and all he could do then was stare up the ceiling – pointedly ignoring the furnace of a man that Katsuki was.

‘I hope Mi-chan doesn’t –‘ The door to Katsuki’s room opened, the light from inside spilling out and Izuku knew without a doubt that it was Mikumo at the door. Highly likely that Natsuki was there too since the beta could hair two sets of feet padding over to Katsuki’s bed.

“Papa, Natsuki had a nightmare. Can we sleep here?”

Suppressing a sigh, Izuku managed to pull the blankets off a bit despite Katsuki trapping both of his arms. “Get in.”

Both boys quickly jumped into bed, causing Katsuki to grumble more and pull Izuku closer. The two thankfully tucked themselves in and pulled the blankets around the four of them.

“Good night, papa.”