You have been dating your brothers bestfriend, kirishima for a couple months. You were in your room with him, thinking katsuki was out training when someone barraged into your room. It was katsuki.

Bakugou: “Y/n where’s-“

He froze when he saw you on your bed with kirishima, his arm around your shoulder. Kirishima immediately got off you and moved away, sitting on the edge of the bed now.

Kirishima: “Bakugou I can explain..”

Katsuki stared at the two, scoffing.

Bakugou: “Someone tell me what the FUCK is going on here?!”