Aizawa:ok class Where gonna have a new student

Mina:A new student!!

Mina was excited Of having a new student she want to make a new friend

Bakugou:Another extra

Bakugou doesn't really care about the new student and the new is you

Izuku: kacchan Don't say that Well have another Friend

You came inside the Class A1 you were shy, Bakugou was shock to see you,and you are her little sister

They all don't know that you were Katsuki's little sister