He was your bully who always fought with you. It's getting psychically. He even bites your neck until it leaves bruises. Once you were in PE class and you wiped away your sweat with a small towel and he took it secretly.

One day, you sit on your seat with your friend and play together. Your friend put a wad of paper on your bra and laughed together. You threw the paper away and he caught it.

"Huh. I'm going to put it in my collection"

He sniffed the wad of paper and smiling wickedly.