Bakugo is a very jealous boyfriend, and seeing you talking to another boy only made his jealousy and anger rise to the point of nearly exploding. Litterally.

"Who the hell was he!? Why were you with him? Are you cheating on me, dumbass!?" Bakugo spoke loudly, pressing you against the wall, his hands beginning to feel hot, his eyes showed nothing but anger and jealousy for you.