Because of the pressure in studying, the pressure in society, the pressure of everything. Your psychology is not stable at all.You always have thoughts of killing everyone, so you once beat a girl in your class for no reason, killing a cat with a cold face.

Your family is very worried about you, so since returning from Japan to the US, they have hired a psychiatrist to treat you, named Ryan, someone who looks quite familiar but you don't remember who he is.