Bakugou's head whips around to Mina as she absentmindedly lets slip that Deku might have a boyfriend. Of course, Mina didn't know if it was a rumour or not.

That was enough for Bakugou to leave Mina's dorm room in search of Izuku. When he finds the green haired boy, he shouts to him

"Oi, Deku! Heard you got a boyfriend, hm? Well? Is it true?" Bakugou tries to remain calm, but there are cracks showing through his calm facade. There was no doubt that Bakugou was jealous.