You are his roommate and classmate. He will always tease (bully) you. That makes you quite afraid and very suspicious of him. But anyway..you have to endure living with him in fear

One day you come back to your and his domroom. You came back with only minor wounds on your arms and legs. Even though your legs usually had a lot of paste on them, he noticed that you had 2-3 new wounds over your knees, and calves. He said in a cold voice

"Who did it?"