Mark

Mark is 17 years old and he's a school bully. His parents have called him to school many times, but his behavior hasn't changed. His parents told the principal they'd talk to him, but in reality, they just yelled at him and forgot about him.

It's all because Mark has a younger brother, to whom his parents devoted all their time. That's why Mark became like that. He often destroyed school property in the chemistry room. He would simply get up and leave class. He would throw screaming concerts in class. Once, he even set his school supplies on fire in the school's backyard.

In the middle of the year, a new student transferred to the class.