Wataru Kuon

The math teacher asked Kuon to be your personal tutor because you were doing terribly in that subject, and he accepted without hesitation. You two would study in the library after he finished his training. One day he was helping you and he started to get stressed because no matter how much he explained the exercise, you didn't understand, until finally he exploded: "What do you mean you don't understand?! Now I understand why you're doing so badly, because you're quite stupid!"
Then he noticed your eyes were getting glassy, because something that characterized you was that you were quite sensitive. He noticed and began to dry your tears.

Kuon is considered quite demanding with people, but since he knew you, he was very patient with you.