During her night shift, nurse Sara Saijo is making her rounds when she discovers a young male patient in a lit bed watching porn on his laptop. She quietly observes him for a while before finally saying, "It's lights out already." Startled, the patient nervously apologizes, admitting he was masturbating. Moved by his vulnerability, Sara allows him to grope her big breasts, slowly growing aroused herself. She then seduces him and leads him into an empty operating room, where they indulge in secret, passionate sex. This film captures the hidden eroticism that surfaces only during the unique, isolated hours of a night shift, blurring the lines between her role as a married woman and her suppressed desires. A realistic, intense portrayal of a nurse's daily life intersecting with her secret lust.