Kouzou returns home to his family, maintaining a facade of kindness and earnestness before his wife, Kayoko. However, behind closed doors, he engages in a volatile power struggle with his daughter Airi, who openly despises his perverted nature. Taking advantage of their mother's brief absence, Kouzou forces Airi into a sexual encounter as "punishment" for her insolence, while Airi accuses him of manipulating other girls for his twisted research.
Kouzou further tightens his grip on the household, using blackmail and manipulation to force Marina into submission both in public and at home. While Yuka expresses her absolute devotion to him, Kouzou exploits Marina's school festival preparations to deepen her psychological dependence. The episode culminates in Airi demanding her own share of attention, cementing Kouzou's role as the dominant figure over the women in his life.
Airi's intense possessiveness toward her father is revealed to be the result of a hypnotic drug, leading to a series of erratic behaviors and sexual encounters. As the father and Airi reconcile, Sana continues to manipulate the family dynamics, drawing Marina into their illicit activities. However, a case of mistaken identity creates a new scandal, forcing their mother to order a school transfer for both daughters to protect them.