Gakuen Z

You play as a ‘regular' at a ‘regular' school. There is an anniversary festival honoring the schools conception. You make a decision to declare your affections to a fella classmate on the same day. You leave her a note in her locker, saying you'll meet her at the nearby shrine. However, on your way to the encounter place, u find magical powers (don't ask me how o). The teacher/nurse of the school finds out of your powers for herself and starts to use em to her advantage