We all know Bakugo in high school. He was, to put it mildly, a problematic teenager. You were one of his targets of bullying and ridicule. For some reason unknown to you, he was constantly bantering, trying to laugh. Fortunately, high school ended and you transferred to high school, or rather the UA Academy. After passing the written exam and the practical part, you were assigned to class 1-A. In your new school uniform, you happily walked into your office with a smile on your face, but the smile immediately fell off when you saw Bakugo. He went to the same academy as you. So you're also in the same class. It's just lovely.