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Forbidden Fruit

Summary:

Katsuki had always known him as His best friends annoying little brother. Then one day after football practice, the team goes over Kirishima's house, and he catches a glimpse at Izuku, but something seems different.

Deku's grown up. And he's grown up hot..

He's filled into his figure, got rid of the stutter, gained some confidence, and Bakugou's definitely smitten. But he soon comes to realize that he's not the only one who noticed that little Izuku has grown up.

Now not only is he trying to gain a relationship with Izuku, he has to fight off his teammates who are also vying for the green haired cutie's attention.

Notes:

Hello!!!! I hope you enjoy this story. I'm not the best writer and don't have a beta reader atm but I'm trying my best. If you find any mistakes feel free to write them in the comments. Also updates will not be super fast because I am in school, but I've been getting better at writing in my free time so hopefully I can start regularly updating both of my stories (which you should totally check out btw 😌). Anyways have fun reading :)

Chapter 1: Prologue

Chapter Text

Eijirou and Katsuki were attached at the hip from the moment they met each other. Whether it be inside during class, or outside during recess, the two would always be seen together. They truly were best friends. Which is why it was no surprise that when they got to high school they tried out for football together.

They made the team… That was no surprise either.

Everyone could plainly see their athletic prowess just by looking at them. They weren’t extremely buff by any means, after all they are only 14, but you could surely see some type of muscle definition starting to form. They were the best on the JV team, quickly gaining popularity throughout the entire school.

There was a lot expected of them, and that was ok because they would get through it together.
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Katsuki sat in his desk chair bored and on the verge of sleep. Present Mic was going on another one of his tangents. Something about an upcoming test, but Katsuki doesn't really care.

His grades are near perfect so he can afford to zone out once and a while. What he’s really worried about is how he’s going to have enough time to tutor his friends, go to practice, and still get to bed before 10.

What? Some people like to get at least eight hours of sleep. Sue him.

Soon enough the last bell rang and students started filing out of the class. All except for himself, Eijirou, Kaminari, and Sero. And all of a sudden Kirishima’s up in his face

“So Bakubro, are we still on for studying after practice?” “Yeah we need some serious help, I didn’t understand a word Mic was saying up there.” Kaminari adds.

Katsuki is surprised that Denki’s still in the advanced class in the first place, Sero and Kirishima just need help on the small details, but for Kami it’s like he’s trying to teach a toddler how to read.

“I think it was something about the difference between the theme and mood?” Sero adds on. “You guys do know that one day I won’t be here to help you through every little step right?” Bakugou says as he gives them a deadpan look.

“Nah bro, we’ll be together forever~” Kirishima swoons as he drapes himself over Bakugou's desk, and gets shoved off as a result. “Stop fooling around and let’s go. We only got two hours before practice and y’all need all the help you can get.” He mutters as he makes his way to the door. The others follow behind him, akin to a mother duck leading it’s children.

“We’re going to your place right, Eijirou?” Sero questions. The boy in question nods, “Of course, my place is closest to the school, plus I have to make sure my brother got home ok.”

“You know sometimes I forget you have a brother Kiri.” Denki chimes in. “Tch, how could you. The little twerp is always hanging around us whenever we go over.” Bakugou says with an eye roll. “Come one Kats, you can’t blame him. He’s a little awkward sure, but he just wants to get to know my friends.”

“You have to say sappy shit like that cause he’s your brother.” Bakugou scoffs. “Yeah but you're like my brother too, so you two are related by association.” Kiri says with the biggest smile he could muster, and it takes all of Bakugou's willpower not to hit him.

The walk to the Kirishima house is filled with chatter. Most coming from the three ‘idiots’ as bakugou likes to call them. Once they get there they all file into the living room, take seats around the table, and take out all of their supplies. All except Eijirou, who went upstairs to check on his brother.

“Psst.” Kaminari stage whispers, “Hey Kats?” “What do you want, dunce face?” “Ok, first off rude, and second why don’t you like Kiri’s brother?” Kami questions with raised eyebrows. “Yeah I was wondering the same thing. Every time I’ve met him he’s been so nice.” Sero adds in. They both stare at Katsuki, waiting for an answer.

“Deku’s like a-” “Wait you call him Deku, like on purpose?!” Denki interrupts. Bakugou shoots him a glare. “Sorry sorry, go on.”

“Like I was trying to say, Deku’s like a baby. He needs constant attention, and he cries for no reason. And he’s always around when me and Ei hang out.”

“It’s not that I don’t like him, he’s just super annoying, kind of like you guys.” He says with a smirk. “Hey we’re not that annoying” Kiri says as he’s running down the stairs. Trailing behind him is Izuku, his little brother.

Izuku is only 12, so he and his brother don’t go to the same school, but that didn’t matter anyway. Eijirou and Izuku, despite their age gap are extremely close. So wherever ‘Eiji’ ,as izuku has dubbed him, goes he follows right behind.

“Hope you guys don’t mind if Izuku stays down here with us.” He says, gesturing to everyone.
“Hello everyone, I promise I won’t cause any trouble.” Izuku says greeting everyone.

Izuku is noticeably shorter than his brother, slimmer too. His eyes are bigger though, and boy are they bright. Probably the brightest emerald green you’ve ever seen. And his freckles are littered over chubby cheeks.

In conclusion, he’s the most adorable kid anyones ever seen.

“It’s fine with us, right guys?” Sero questions as he looks at Kami and Bakugou. “Yeah! Long time no see Izuku, how's it going little man?” Kaminari ruffles Deku’s hair, and he blushes in response. “I-im good, thank you for asking Kaminari.”

“Ok, if everyone’s done with the pleasantries, can we get started? I’m done waiting for you idiots.” Bakugou grumbles.
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“Ok so Izuku, mom should be home soon so don’t get into any trouble. And don’t worry i’ll be back before dinner.” Kirishima gives his brother a hug before he and his friends start towards the door.

“You promise?” Izuku’s peeking his head out of the door waiting for his reassurance.
“Promis little bro. Now go inside and don’t forget to lock the door!”