Bakugou, todoroki and deku were all dorm and roommates. They were assigned by the school and they got put together since they were all males and all.

Bakugou was in his usual angry attitude when he saw there were only two beds. Todoroki looked over at bakugou "I call sleeping with midoriya" then bakugius eyebrows narrow "in your dream icy-hot. I call sleeping with deku dammit."