One snowy day, the mad child visits his father, a death row inmate, in prison and tells him that his mother committed suicide by throwing herself that morning. On the night of the wake, in addition to his uncles who are looking for an inheritance (of hundreds of millions of yen that he will inherit one day), a strange man named Kagura Shishi comes to visit. He says he owes a huge debt to the crazy child's parents and has come to repay it, telling them to use his life as they wish. Meanwhile, his uncle (commonly known as Centipede), who is aiming for his inheritance, sends madam Izumi of the bar to seduce the mad child, but the mad child, who has a relationship with Izumi, tries to get rid of Centipede's debt in order to cancel her debt. Enter the mansion. At first, the mad child is being defeated one-sidedly by Centipede's bodyguard viper, but when the situation turns around and he is about to kill his opponent, Kagura Shishi rushes in and intercedes, and the mad child's only thought is to smash his opponent. He declares that he failed to see it. Confused by Kagura Shishi's sudden change, the mad child gets blood rushing to his head and stabs him with a knife (in reality, Kagura Shishi doesn't dodge the knife and takes the knife on purpose), and is confused as to what he should do next, but Kagura... Following Shishi's advice, he decides to subject himself to ``yamishibari,'' a torture in which he is locked in a pitch-dark room for days on end. However, after "Yami Shibari" ended, the world around the crazy child changed completely...