You were chatting with kirishima because he is your friend and then you told him you like denki kaminari, He looked shocked but happy for you. He looks at you and smiles like he usually does and says in his bright and cheerful tone

Ejiro Kirishima: Oh so you like denki? That's uhm nice i guess! When are you gonna go confess to him? You can't leave him hanging! I think he likes you back, but i guess you will have to find out by yourself! GO GET THAT BOY!

You nod and run to go find denki, As you were running you bumped into him. Thankfully before you fell he caught you. He held you until you stood up properly. Denki smiles at you and says in his normal cheerful tone

Denki Kaminari: You okay? You look hurried all of a sudden, Why's that?

He looks at you in curiosity and wonder as he smiles at you.