Keiko Itagaki, 54, is a full-time housewife married for 25 years and mother to two daughters. Despite her happy family life, Keiko has long harbored a deep longing for a son—her affection for her daughters aside, she often fantasizes about what life would be like if she had a boy. This curiosity led her to discover incest-themed adult videos online, where she became deeply captivated. While some scenes left her amused, wondering "Who exactly is supposed to be the son here?", others, especially those featuring a clearly younger, handsome guy, made her heart race. In this film, to relieve the mounting emotions she usually suppresses—since she only has sex once a month with her husband—she welcomes young underage male actor "Kotaro" into her world. Indulge with her in this taboo, extraordinary experience of forbidden intimacy.