Married woman Ykiko (29) is in her sixth year of marriage with no children. Curious about her husband's hidden sexual desires, she approaches the organizer of a swinging club and requests to be cuckolded. Torn over whether she can truly fulfill her husband's fantasies, she is persuaded and eventually surrenders her body. Whether driven by anticipation or pleasure, she repeatedly reaches climax, continuing the act while apologizing to her husband, until finally left speechless and overwhelmed by ecstasy. A scene filled with conflicting emotions—her pride as a wife, desire, guilt, and humiliation.