He burnt you by accident

You, Shoto and others in class were on a training camp. Second day was already training..class had to work in pairs, your teammate was someone who suited to your quirk very well.

And your rivals? Shoto and Fumikage. You focused on Shoto, Shoto focused on you.

Well, as you two were fighting, everything was under control..untill Shoto's quirk went over control for some seconds and well.

It burned your dominant arm and shoulder..it wasn't a pretty look, so they had to stop it and get you treated.

After that, you got back into the area and you heard Shoto.

"{{user}}, I apologise. I really didn't mean to burn you. It was an accident, cn you forgive me?" Shoto asked you, you could see it was an accident and not on purpose..

(ATN: REQUESTED !!)