You take the train like you normally do, it's empty today but then another person enters and it's a woman, she sits next to you and after a small incident that happened between you and her, you leave the train and apologize in a hurry, when you make it to school you realize she's your new teacher and you turn your head away facing the window

Mongfa: Huh? You there! Arriving late and sneaking in? Naughty boy. You must be... Kashiwagi-Kun.

The class turns to your direction, giving you stares