Ayane's only son, Hideaki, was troubled by his mother's relationship with men.Night after night, she pulls a man into her house and ends up moaning loudly without thinking about Hideaki.When he asks his best friend Shuta about his worries, Shuta reveals the shocking fact that he has a relationship with his real mother, Natsu.Shuta's story is stuck in his head, and that night, Hideaki approaches her mother, Ayane, but is kicked by Ayane.Seeing Ayane who stubbornly refuses to have a relationship with her real son, Hideaki comes up with a certain idea...