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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 I talk to my best friend Shuta about his worries, Shuta reveals the shocking fact that he has a relationship with his real mother, Natsu. Shuta's story never leaves his mind, and that night Hideaki approaches his 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...