Izuku|stepbro

Izuku made a lot of vows in his life. The first very one being never to be like his father. Izuku doesn't remember much of him, but he saw the effect that his absence had on his mother. Izuku had to grow to fit the shoes that belonged to the man of the house at just age 6, and he would forever resent his pathetic excuse of a father for that. But he hated him more for leaving his mother.

Izuku understood why his dad would wanna leave someone like him: Izuku was a loser kid. He was someone that people noticed for all the wrong reasons. He was weak, he was timid, he was kind, he was giving. Traits that are quickly beaten out of you when you grow up on Izuku's hometown streets.

Izuku's second vow to himself was that he would never let another person pick on him ever again. He had too much lying on his shoulders to be ridiculed every time he went to school. He had his poor mother to care for and he would rather shoot himself in the foot than come home bruised again because of he was too scared to stick up for himself.

Money that went into shitty plasters and bandages instead went into the electric bills. Izuku grew into himself, and the soft hands he grew up with were chiselled into rough weapons. Lollypops turned into cigarettes that he stole from the corner store for his mother.

Izuku quickly found his place in society as a runner boy. His reckless actions and sticky fingers had caught the attention of local gangs, and it turned out he was a good asset after all.

His observing green eyes always spotted him key pieces of information, such as the licence plates of undercover cop cars. His judge of character from years of abuse was honed and useful. The muscle he'd built up over the years of running errands for his mother always gave him the upper hand in chases. And his naive green-eyed face earned him the nickname: Green bean.

All the money he earned went towards his mother, helping her to get on her feet and making sure she slept comfortably every night. And that was his final vow: His mother always came first.

Izuku was old and ugly enough to know that no one would be good enough for his angel of a mother. So when his mother began dating again, Izuku made sure to follow the men, doing background checks, asking around about their name. It didn't matter anyway, none of them ever lasted long.

Except one. A 45-year-old man with a simple mechanics job named Masaki. His mother and Masaki went on a few dates, but Izuku never expected it to last. Masaki was an average man with an average income, and after asking around town, Izuku learned that Masaki had a daughter around Izuku's age. Why would his mother go for something like that?

But a few dates turned into dinners at his house. Which then turned into trips out of town. And before Izuku knew it, Masaki was moving in with his daughter: you.

The first time Izuku saw you, you looked just about as pleased as he did about this entire thing. But of course, there was nothing either of you could say to your parents to try and change their mind: though Izuku tried.

But he had made a vow not to be like his father, so he tried not to get involved in his mother's chose too much. Besides, Masaki was nice enough. And Izuku even found himself growing closer to you.

He learned about your mother and how she died while giving birth to you, and he told you about his deadbeat runaway father. He would eat your leftovers at dinner when he attended. He would let you watch him play games with his friends and prepare deals. He would let you come with him to meet-ups, but he wouldn't let you touch a joint.

Izuku grew very fond of you, and quite protective too. When he would take you out with him to hang outs, he wouldn't let anyone look at you for too long. He'd hover over top of you anytime you went out, making sure you were alright. He made it known that you were with him so nobody ever got any ideas. Izuku was protective when he cared about someone, but he could see how his protective instincts were from a place more than just 'brotherly care.

When you would laugh at one of his mate's jokes, he would feel his fists clench. When he would see you cooking with his mother, his heart would do an unusual clench. When he saw you leaving the bathroom from your nightly showers, he would have to look away and clench his jaw.

You were gorgeous, Izuku was man enough to admit that. Anyone who couldn't see that was simply a fool. It wasn't wrong for him as your ste-brother to say that. But acting on the feelings you evoked anytime you played with his knuckles or smiled fondly up at him would be wrong.

And so Izuku made himself a new vow: you were off limits.

Not to mention how his mother would feel if she found out that Izuku had sought out her boyfriend's daughter. It'd just be a big whole mess of pointing hands, and Izuku didn't want that for any of them. His mother always came first after all.

It wouldn't be wrong if Izuku were to try anything with you. You weren't blood after all. You were only related by a title made by your joined parents. Even if Izuku introduced you to everyone he met as his 'little sis', it wouldn't be weird, right?

Izuku came home late that night, after having trouble with his motorbike on the way home. He thinks his engine is seizing again; becoming sick and tired of having to lube up the oil tank. He brushes his hands down his pants to try and rid himself of the sticky black oil as he walks through the apartment with a cig sitting comfortably on his bottom lip.

His emerald eyes flicker across to the living room when a shadow catches the corner of his eye, and he nearly drops his joint at the sight of you sitting there on the couch, only wearing one of his t-shirts.

He quickly gives his brain a shake, remembering his vow. No touching.

"What're you doin' up? It's late." Izuku asks, continuing his walk into the kitchen to find the oil canister he keeps for situations just like this. His bike he means. Of course. He kicks himself for the dirty image his mind produces yet again.

Rules were made to be broken, right? Vows were unsaid rules. Breaking one vow couldn't hurt.. right?