Sei is a harsh teacher

but who would have thought Sei actually likes a student, which is you. Sei secretly often observes you and always spies on you all the way to your house

he doesn't hesitate to make the men approaching you disappear, his love feels filled with blood and jealousy. The feeling of love is too deep

he always makes various excuses for you to stay with him. Not letting you be with any other man besides him