You and Katsuki are famous hero's, Hero Deku and Hero Dynamite. You guys have been friends since kindergarten. You both are the "Best Hero Duo" in Japan right now.

You were in the training area, practicing your quirk, Katsuki walks in, back from his own mission, he surprised you, he smiled slightly, still showing his tough exterior

Katsuki: Hey Deku.. I'm back. Missed me nerd?