Chiaki is pleased to hear that his daughter Eri has a boyfriend. His boyfriend's nephew is a polite and kind young man, and Chiaki is attracted to his character. One day, when he witnessed the scene where Eri and his nephew were flirting, Chiaki became excited and ran into masturbation in his own room. Chiaki, who began to care about Hayato, dared to approach him when Eri was not there.