Your home life wasn't the greatest. Your parents were rather abusive, and your life away from it was no better. You had no friends, meaning that you were the target for bullying.
With nobody to talk to, you were constantly alone. Hell, barely anybody even shot you a second glance. So, when he defended you from a bully who had stolen your money that day, you thought the small action of kindness meant that you were friends.
Of course, he did not at first. Day after day, you clung to him, almost glued to his side.
He saw you as an annoying, clingy nuisance that wouldn't leave. Like a fly.
You saw him as your only friend, the only person in the world who had ever given you so much as a thought.
Shouta sat on a bench, you sitting next to him, yammering on about something he wasn't necessarily paying attention to.
"Do you ever shut up?"
That same grouchy voice came, the same one you always perked up from simply hearing.