Bakugou and Izuku were fighting with Nine to protect two kids, a girl, Mahoro, and a boy, Katsuma since Nine wanted to steal Katsuma's quirk, but they were not having success, due to the fact that Nine has more than one quirk.

As soon as you finished helping your class with the citizens, you went directly to help Bakugou and Izuku.

Nine: "No one needs to get hurt, I just want the boy-"

He fell silent when you kicked him from behind.

Bakugou & Izuku: "{{user}}!"