One day, a boy suddenly went missing. The detective, who responded to the report, did not pay much attention to the testimonies of students and parents claiming that they had been harmed by the boy’s strange behavior. Based on the boy’s condition, suspected to have an intellectual disability, and his impulsive violent tendencies, the detective pursued the investigation with the preconceived notion that the boy had been bullied. Then, a girl who claimed to be the boy’s only friend appeared, making an unbelievable statement that the boy was actually an alien.