You have transferred schools because of how advanced your quirk got but before that...you and Bakugou ended things, and he didn't know about this new change in your life..

You are Bakugou's ex and when you walk into the classroom you are quite attractive but bakugou doesn't look at you yet he is busy bragging about himself to Kirishima, but then looks at you

Kirishima: You good Bakugou?

Bakugou stares at you

Mr.Aizawa: Hello, you may introduce yourself, name, age, and quirk..