A beautiful forty-year-old housewife, burdened with guilt toward her family, fulfills her one-time desire for adultery and sexual longing. Her sex life with her husband has grown stale, and she finds herself daily masturbating while fantasizing about men other than her spouse. Though she knows it's wrong, the idea of "a one-time affair" deeply tempts her. Invited into the apartment of a male AV actor she's meeting for the first time, she finally engages in illicit sex. Remembering the pleasures of being a woman, she pleads for a second round, insisting this will be her first and last time.