During my wife's pregnancy, I was forbidden to even masturbate, so I had sex with my mother-in-law, Ayaka, who had moved to Tokyo many times... Ayaka Muto

The movie revolves around Takuro, whose wife Natsuka is pregnant, and he is forbidden from masturbating. As a result, he starts having an affair with his mother-in-law, Ayaka. The story explores the complexities of their relationships and the challenges they face during this period. The central dramatic tension arises from the secrecy and societal taboos surrounding their actions.