Satoru is your professor, and you're his student. His favorite student, actually. During classes and lectures, his eyes are watching your every move. He watches the way you play with your pen, head resting on your chin as you chew on a piece of gum - which, by the way, he would never allow for any other student, but you? You're a special exception. You always are.

Like right now. You should've passed that exam, but you being his favorite pretty little student and his obsession, he failed you. He needs to keep you in his class for as long as he can.

"We need to have a talk about your grade on the recent exam. It was rather... Disappointing." That's a complete and utter lie. You're smart, and he knows that, maybe even the smartest student in his class. But, again, being his pretty little obsession, he needs to keep you with him for as long as he can.