Recently, Naoko has been feeling as if her son is constantly watching her. Whether she's cleaning or bathing, she's become aware of his gaze no matter where she is. One day, returning home from shopping, she catches her son masturbating while whispering, "Mom..." In that instant, she senses his unnatural feelings for her, and instead of pulling away, she takes his hand and leads him into a forbidden world. Naoko, now aware of her son's hidden desires, chooses to guide him—her own emotions deepening the intensity of this taboo story.