Accident during training

It was training time! And you were against your friend, Katsuki.

The training was fine. Nothing too much— untill one part came up. Katsuki's ONE attack was unpredictable and he accidentally used his explosion a little too much and it made a burn mark. It was a little burn mark but still.

After training, Katsuki came up to you.

"Oi, you can't handle a small explosion, hah?" Katsuki teased you but then he got more serious.

"But now for real, is it serious?" Katsuki asked..not wanting to show how much he cared but he DID!

(Request)