Actions

Work Header

21 Days with Dad

Summary:

PH! Alpha Bkg accidentally impregnated a quirkless, civilian Omega named Izuku. When Izuku told him about it, he rejected his responsibilities

"I won't give up my years of hardwork for that child, Deku. Im sorry"

However he didn't let Izuku shoulder all the burden, he give him money he'll need and leave him alone

"I understand. Thank you, Dynamight-san and im sorry..i promise to stay away from your sight, and so is the child" Izuku said, gently rubbing his currently flat stomach.

Katsuki didn't waste anymore time with him and left. The alpha just hopes Izuku can successfully give birth and live a peaceful life with their child

Although 10 years later, Katsuki is tasked to take care of an 11 year old alpha kid named Nozomi Midoriya for 21 days. Can he do it? Can he face his son?

Chapter 1: Day 1-2

Chapter Text

Midoriya Izuku is a quirkless omega that works in a coffee shop nearby Enji Todoroki's agency-in where the rising pro hero Dyanmight works. The alpha took a liking towards the omega, however Izuku would always reject him. Telling him that:

"Im out of your league, Dynamight-san"

"Im just a nobody, you're a hero. You can't be with someone as low as me"

"No, Dynamight-san. You deserve someone better, a quirkless omega like me is nothing"

But Katsuki is persistent. He found Izuku's hard to get game like a battle, a battle he know, without a single doubt he'll win. And he's right, after a few months of courting, Izuku eventually gave in

"I love you, Izuku. I don't care if your quirkless and an omega. I still fucking love you for who you are"

His butterfly feeding words made Izuku's heart flutter. He felt like floating everytime the great pro hero Dynamight picks him up at work and bring him out on dates, when someone ask Katsuki question about their relationships, the hero would gladly tell their assess that Izuku is his mate

The pro hero doesn't mind the click and flashes of camera, in fact i liked it. He like to boast to everyone that he's already in a relationship with the most beautiful and amazing omega ever

But everything drastically change when one night Izuku came to him. Looking uneasy as he sat down in Katsuki's sofa

"Hey what's wrong? Did you read those comments again, Deku? I told you not to mind those shi-"

"It's not about them, Kaachan...i uhm"

Katsuki stares at his beloved intensively, worried to what the nerd is thingking. Then suddenly Izuku flushed red, his freckles highlighted in his blushing cheeks while a smile slowly creeps in his lips

"Im pregnant, Kaachan"

Izuku smiles from ear to ear, giggling. Ecstatic to know his expecting. While Katsuki fell silent, his breathing stopped as he forced himself to understand the sudden news

/no..he can't be pregnant...i-fuck what about my career!?/

To this moment Katsuki knew he's being forced to make a decision, not by Izuku but by his own self. The alpha inside him demands to take care of his mate and pup, while his own being refuses to

{Take fucking responsibilities you idiot!}

The alpha in him growls. Causing Katsuki to have an even more bad temper to face his beloved omega, who is now looking both worried and scared while watching him

"K-kaachan?...aren't you happy?"

Looking at those fragile, beautiful and hopeful eyes of Izuku made Katsuki curse himself mentally.

/it's for the best/

And Katsuki's choosing what he believes is best. He loves Izuku, but he isn't ready to be a father yet, nor take care of his pregnant mate. His reasons may sound foolish, but he knows it's for the better

"I dont want that child, Izuku. Raise it on your own if you want, i don't care. Just don't expect me to take my side of burden to that pup, i ain't taking shit"

He knows his words are already breaking Izuku's heart. He's aware, especially when Izuku began to spring off his distress scent of reek and dying flowers. Upon inhaling the scent, his inner alpha growls in rage

The pro hero clenched his fist, fighting his instincts to crawl back to Izuku, beg for apologies and to sooth his whining omega until he's satisfied, but no. He already made up his mind

"B-but Kaachan it's your pup....you..you can't just leave me alone to take care of it"

"It's fucking simple, Deku. Stop being stupid and go back to your mother"

He heard Izuku gasp behind him. His distress scent became thic and heavy

/fuck. If this continues i might die in suffocation/

"So? What the hell are you still standing there for? Go!"

He turns on his back and yelled at Izuku. His heart instantly being stab at the sight of his broken down omega. Tears streams down to his chin as he continues to stare at Katsuki

Eyes filled with immense pain and disappointment

"I knew it....i knew i shouldn't have listened to your lies"

The words Izuku is like torture. His heart felt like being hammered with a nail stuck in his chest.

Izuku stands up straight and slowly makes his way to the door. Every step Izuku's takes away from Katsuki, the more his alpha howls in pain

{No! Omega my omega! My pup! Comeback!}

Katsuki doesn't know if it's him or his inner alpha taking over, but he ran after Izuku. He grabed his wrist and......and froze. Not knowing what to do he just stares at the hurtful Izuku who smiles bitterly

"Don't worry, Dynamight-san. Me and the pup won't bother you any longer"

Izuku pulled his wrist away and left. Leaving Katsuki alone in his apartment. It was a good choice that Izuku didn't live with the alpha yet, or else he'll have to stay longer and suffer

Katsuki on the other hand, longingly stares at the shirts and hoodies he stole from Izuku's cabinet weeks and months ago. One by one he picked them up and embraced, crying in the scent of his loss omega

Katsuki would just hope one day if ever they meet again, things are better
_
_
_
_
[Day 1]

But it seems like the universe doesn't agree with him. Both of them looking eye to eye with so much emotions, his inner alpha cheered in the sight of his omega

After 10 fucking years he sees Izuku again, those previous gleaming emerald eyes now looked dull and tired, he seemed to loose some weight too. But it didn't change the fact that his Deku seemed to gain more meat in his legs and ass, or maybe they're still the same and Katsuki is just missing them?

Either way it could've been perfect if it weren't only for the shitty villian who took Izuku as his hostage

Katsuki had just started to patrol around his new area when a shameless villian decided to cause havoc in front of him, not to mention in broad daylight. Inside a wrecked restaurant is pro hero Dyanmight facing a villian with instant bullet release quirk with Izuku as his hostage and a 11 year old boy standing near Katsuki while glaring at the criminal

"Is it just me or does that kid looks like Dynamight's love child?"

The villian asked at Izuku, pointing his finger guns at the greenet's head as his other hand grips Izuku's shoulder, while he fearlessly stares back and forth at Katsuki and the child

Izuku remained quiet as he trembles. Eyes locked at Katsuki, through that he begged the man to take his son away from the scene. He can't risk Nozomi to see such a traumatizing sight

"I don't know this old man"

Nozomi answered in monotone voice. Izuku mentally curses

/this is not the time for that Nozomi/

"Really kid? Such a shame i thought you two are related"

Tightening his hold on Izuku. The villian prepares his gun to fire. Katsuki immediately move grab Nozomi out of the resto, despite him feeling awful for leaving Izuku with that stupidly dangerous villian

"What the hell! Let me go! I have to save my papa!"

Nozomi struggles in his hold, but fails in comparison to Katsuki's strength

"Wait here brat. Im going to save your papa"

Leaving Nozomi in the nurses and police care, he hurriedly back inside. But stop midway when he saw Izuku unconsciously lying on the floor while the villian is getting away, yet he stopped in his tracks too and smugly faced the hero

"Oh my~ what you gonna do Dynamight? Capture me or check on that waiter?"

The hero gets conflicted. He faced several situations like these before, but he handled it like a piece of fucking cake. So what's the difference now?

{Our omega! Omega is in trouble! Go to omega!}

Clenching his fist, Katsuki followed his alpha instincts and immediately went towards Izuku. Heart pounding as he carefully checks for any severe injuries. Katsuki sighs in relief when there wasn't any except for the bruises, cuts and burns around his arms. Izuku's breathing is also steady and his heart rate is normal.

"Deku can you hear me? Wake up!"

But the greenete remained unconscious. Not knowing why made the alpha worry. He picks up Izuku carrying him on bridal style. The scent of Izuku made him calm and collected, he even almost purred for goodness sake

At the hospital, Katsuki was interviewed by a few police officers. Asking him questions regarding the villians features and what his quirk

"Other than his fucking fingers turns into barrel with a muzzle at the ends. nothing more"

The police was about to write it down to his notes, when Nozomi's voice interrupted

"Are you blind, pro hero boom boom? That wasn't the guy's quirk, it was an illusion. There were two villians there!"

Katsuki and the police immediately turn their heads towards the boy, waiting for him to continue even though Katsuki wanted to correct the boy for mispeaking his hero name

"There was another guy hiding behind the counter, his quirk was forming illusions while that guy who took my papa as his hostage has a quirk that could control any light metal material"

"How can you be so sure?"

Katsuki asked, staring at his son intensively, making sure he wasn't making up stories. The little boy rolled his eyes and clicked his tongue

"Because if he's quirk is really is firing bullets from his fingers, then why was there a gun in his belt?"

Now that Nozomi mentioned it, Katsuki recalls that there was truly a gun locked in the villian's belt. And maybe he was too occupied in staring at Izuku that he didn't notice there were two criminals at the scene

/fuck. I almost placed our lives in jeopardy/

The police who was too stunned to talk, just took his leave before a respectful bow to Nozomi and Katsuki. The pro hero stares at the boy who sits calmly in his seat

"What's your name?" He asked, taking a seat beside the boy

"Nozomi Midoriya"

Katsuki's eyes widden in confirmation. He couldn't help himself to stare closely at Nozomi

Blonde hair, red soft eyes and freckles dusted on his cheeks, not to mention the surename that Izuku uses. It's no doubt this is his son.

Unfortunately Nozomi didn't had Izuku's gentle and sweet demeanor, but his. And now he's stuck with him while Izuku is unconscious in the hospital because of omega infirmity

"My dam is wrong about you" Nozomi clicked his tongue

"What do you mean?" The alpha asked

"You're ugly than what he said, pro hero boom boom"

The alpha kid bluntly states, staring at his sire in disinterest. Katsuki can feel his veins bulging in his forehead, is this what he gets for rejecting him?

"It's pro hero Dynamight. And im handsome as hell, brat!"

"Whatever, old man. Arguing with you is like forcing a donkey to talk"

Katsuki is prepared to argue with his own son, when suddenly a thought hit him

/He knows im his father!?/
_
_
_
_

"Sorry, Katsuki that kid was really persistent to be put in your care. He doesn't want the agency's assigned caretakers to take him"

Katsuki's PR said from the other side of the line. The blond sighs as he eyes Nozomi standing outside Izuku's room door. Peaking through the small opening to see his dam

"Understood. I'll take him"

Katsuki ended the call and shoved his phone inside his pockets. Great he already spent the night in the hospital because Nozomi doesn't want to leave Izuku's side and now he has to babysit the cranky, sharp tongue brat

He has no choice but to take him in. Bidding farewell to the still unconscious Izuku, both blonds left and went to Katsuki's apartment. The same apartment he ended things with Izuku in the middle of a cold night

"The guestroom is at the end of that hall in the right"

Nozomi nods tiredly as he silently went to his temporary room. Katsuki on the other hand dig in his old clothes for Nozomi to wear, he sighs when the his only smallest clothes are none other than his college jerseys

It's still too big for Nozomi, but he can't really find anything else. He'll just shop him clothes tomorrow

Grabing the jersey and an old boxer, he went to Nozomi's room

"Hey brat here's some cl-ugh did you just sleep without taking a bath!?"

Katsuki whines when he saw his pup clumsily fast asleep with his face pinned in the bed. His pro hero Shoto jacket still intact along with his socks

"This kid seriously"

Placing the clean clothes on the bedside table he left Nozomi in peace. Making sure the ac is on before turning off the lights and closing the door

[Day 2]

The next morning Katsuki woke up early, it was just 7 am so he assumed his son is still dead asleep. After doing his morning rituals, Katsuki went to the kitchen to prepare breakfast, only to be greeted with the sight of his 11 year old son setting the table

Wearing the clothes he prepared for him last night and a towel hanging around his neck. His son made a quick glance at him and moved his attention back to the table

A cup of hot coffe and milk is paired along with a plate full of freshly sliced fruits and a homemade italian sandwich called panino con mortadella with extra black pepper because Nozomi loves spices

"You made all these?"

Katsuki asked in amazement as he takes his seat. He nods bemusedly after taking a bite at the sandwich

/not bad/ he thought

"Oh, no the foods cooked themselves"

Nozomi answered in pure sarcasm. He sat across Katsuki and began to eat his breakfast. His sire stares at him inconceivable, as if not believing he really exists

"When did you learn how to cook?"

He asked. Changing the topic and hoping his son would gave him a decent answer. Thankfully the universe heard him

"When i was 6. Papa would always come home late because of work and then wakes up early to help me prepare for school. I felt bad seeing him like that so i began to learn how to cook and since then im the one cooking"

Instantly Katsuki felt a very heavy, nonexistent weight dropped on his shoulders. Yes Nozomi gave him a decent response, but it was far more upsetting than his irony

"I see. So how did you know there were two villians?"

Katsuki asked, changing the topic.....again. It hurts whenever Nozomi disrespects him, but it pains him even more if he sees the dejected, burnt out and resentful emotions his son holds because of his past mistake. He fucked up bad huh?

"Thought you're smarter than me?"

Nozomi raised a brow as the corner of his lips rises

"Getting old now aren't we?"

Mocking his sire

The older blond only replies with a scoffs as he finishes his meal

"Was too dazed to see your dam again"

He answered honestly. His son only replied with a scrunched up face, disgusted to his words. Boy even shivered

/bet this is what they call 'taste your own medicine' Well it's bitter as fuck!/

Katsuki internally cries while he keeps a straight face. Guess this is his karma, his own son. Although he wanted to ask how Nozomi knew, the boy just kept his mouth shut as if he's avoiding that topic as much as he can, so Katsuki didn't push any further

After Katsuki drank the last bit of his coffee he noticed his son wickedly grinning like an idiot. He was about to ask when suddenly his stomach made a very loud rumble

"Ah finally the potion is working"

Katsuki's eyes immediately widden as adrenaline rushes along his blood

"What potion?!"

Nozomi then raised a small bottle of laxative. Showing it to his edgy sire. Katsuki quickly stood up and was about to give his son a mouthful when his stomach growled for the second time

"Nature's calling. Better run, old man"

Katsuki gave his son a demended glare that Nozomi only replied with a smirk before he rapidly ran his way towards the bathroom. His stomach was fucking killing him

After spending more than an hour in the bathroom Katsuki stepped out and saw his son comfortably sitting in the living room with so many shopping bags on the floor and his phone on Nozomi's hands

"Why didn't you told me you were going out?"

He asked, walking towards his son

"I didn't"

Nozomi answered. Still in Katsuki's phone

"Then how did these shopping bags get here?"

Katsuki asked, feeling oddly scared

"Online shopping"

"And where did you get the money?"

Nozomi's mischievous smirk directly sent shivers to his spine

"Where else? Your credit card of course"

Katsuki's jaw dropped

"WHAT!? HOW MUCH DID YOU SPENT?"

"Dunno, i lost count after spending 457 dollars or so"

Nozomi answered with a shrug. Katsuki immediately redden in annoyance

"WHY ON EARTH WOULD YOU FUCKING SPEND SO MUCH MONEY!? DO YOU THINK THEY GROW ON TREES!? IMAGINE HOW BIG THAT LESSEN MY SAVINGS-"

Katsuki was suddenly cut off by his unfazed son

"Oh by the way, while ago your PR sent you a message asking if you want me to be put in your agency's special treatment care"

/oh great! Good news/

Katsuki's wrecked mood instantly lit up. He faced his son with excitement

"And you agreed right?"

"Nope. I replied in your behalf saying (No. Im good, i love spending my time with this adorable boy. I would also like to expand my time with him for 2 more weeks) and your PR gladly grant your request"

Katsuki felt his mind short circuit as he stares at his son in bewilderment. His good mood fades in the wind as he lets out a staggering laugh

"Why are you doing this, Nozomi?"

He asked, using his son's name to show he's not going in the mood for sarcasm or any shitty response. Luckily Nozomi read his signs and became serious as well

"To bring you hell"

His boy stood up from the couch and faced him solemnly

"And i won't stop until you take back what you said 10 years ago"
_
_
_
_
In the evening Katsuki took over the kitchen in fear of what poison his son might mix in his food again. Nozomi was sitting on the table, reading a book he snatched from his father's bookshelf

{Strike a conversion! He's your son, go get to know him more}

Listening to his inner alpha, Katsuki spoke even though he knew Nozomi's words that are as sharp as daggers would kill him

"Yesterday we arrived here late and it was bad for your health. So tonight your sleeping early, 9 pm and i want you already in dreamland"

"And you expect me to follow?"

Annoyed Katsuki stopped cooking and faced his son

"Are you talking back to me!?"

Nozomi moved his gaze away from the book and faced his fuming sire

"Well yeah, that's kinda how communication works"

The boy leered with a grin

"Watch that tone, brat. Im still your dad"

Katsuki snarled without thingking his sudden move hit a nerve on Nozomi. The smile on the boy's face fell and a bitterly smell lingers in the kitchen

"Oh so you're a dad now? It's ironic how you once pushed us away and now you're being a father"

Nozomi then stood up and walked towards his room

"Just call me when it's done"

Stunned Katsuki turned his back and continued cooking. His mind wonders why and how did Nozomi resent him so much, but still decided to be taken in his care

{Great job, dumbass. Now he hates us even more}

his inner alpha praises him sarcastically. Katsuki just rolled his eyes

"Shut the fuck up it was your idea to talk to him"

While Katsuki occupied himself to cooking, he hadn't noticed the faint sound of sob coming from his son's room