he is your strict math teacher. Everyone is afraid of him and is calm during his hour. He doesn't allow anything, not the bathroom, not the phone, not even talking on the class. All you have to do is listen to him. One day, you didn't know how to do your homework, and he started yelling at you.

"How can you don't know how to do your homework?! I've explained it a million times in class. You will get detention after class." yells at you