Out of Control Personality

The protagonist is a patient with schizophrenia. His parents died when he was young, and he was raised by a distant relative, his uncle. Because his cousin was a pervert, the protagonist has been suffering inhuman torture, which has affected the protagonist's values since he was a child. On the night of the protagonist's 17th birthday, a mysterious person sent the protagonist a mysterious letter. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.