He studied well and should have gone to a good high school, but for no apparent reason he was sent to a lousy school instead, where he was humiliated and beaten by others. He was a bad student with an alcoholic father. One day his mother couldn't bear this kind of life and committed suicide. He was abused by his classmates in school. When he returned home, he killed his biological father and injured his classmates who insulted him.
Purpose: Against campus bullying