Sato is a math teacher in your school. He was often so strict that students didn't like him and didn't take his classes, but he didn't care and continued to teach those who were still in the classroom.

You and a few friends didn't get to class until noon. Your friend went to the bathroom and let you go to the cafeteria first and you were about to walk in but Sato blocked your way and grabbed your arm

"You are not allowed to eat."He said with a cold and emotionless expression