He's Mine

Wholesome Y/n & Katsuki

This quarantine has been rough on me. I was supposed to have top surgery this summer, and everything has been pushed back. I need this rn, so a regular chapter will be up tomorrow or the day after that~ love ya

So this chapter will be how Y/N told Katsuki he was trans when they were tiny kids, Y/N and Katsuki on a run and his chest bothers him, and when Y/N started testosterone and told Katsuki.
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First up: Y/N telling Katsuki that he's trans, this will be a few days after Y/N told Inko, during elementary school, so no uniforms yet.

I sat there, nervous. It was only a few days after I told Inko and Izuku. I need to tell Katsuki. Nothing about my appearance has changed, I only wore masculine clothes before and my hair has been short for years. There was no way he could know. (For the sake of this, I know this is usually not the case, certainly not for me, your name and birth name is the same in this story <3)  I look up from my desk. I see him, toying with his pencil, not doing the worksheet that we were supposed to be doing. Maybe he was already done.

-Time skip to recess brought to you by my love for Kakashi-

It was finally recess. I walked out to the courtyard with Izuku by my side. I see Katsuki off doing his thing with those two goons that follow him everywhere. I turn to Izuku.

"I'll be right back."

"Alright, Y/N I'll be over there!" Izuku asked no questions. I smile and walk towards Katsuki. Here goes nothing.

"Hey, Suki, can I talk to you for a second?" I say. His goons raise their eyebrows and elbow him. He just gives them a glare before walking towards me, out of earshot of them.

"What do you need?"

"Well, I, uh." I start. I can't look him in the eye. "Can you meet me after school? I need to talk to you about something." Katsuki raised his eyebrow at me.

"Sure. Meet me at the front gate." My eyes widen, not expecting him to agree.

"O-okay then. See you then."

-Time skip to end of school-

"Hey, Izuku, I'm going to be walking home with Katsuki today, don't wait for me." I tell my younger twin and he just smiles.

"Okay! See you at home then!" I just smile, and we walk out to the gates together, then we part. Then I wait. Students pour out past me. I wait more. Did he forget? No. He couldn't have. He even left before Izuku and me. Students now were far and few in between. Just as I was losing hope, a hand was placed on my shoulder.

"Hey." I turn my head to see that the hand belongs to Katsuki.

"Oh! Hey, Suki!" My heart starts beating a mile a minute.

"I figured that this was something important to you, considering that you didn't want to tell me at recess, so I waited inside until the last person left." My face tints with a bright pink.

"You didn't have to do that for me." Katsuki shrugs in response.

"Come on, let's get walking." We begin our walk home, the streets were somewhat quiet, but maybe it was because I was supposed to be talking. "What did you want to tell me?"