A married woman, Mako, who has been married for four years. One day, her husband brings his young subordinate, Nobuji, to their home. With the last train gone, he has to stay overnight, and when he goes to the bathroom and opens the door, he accidentally sees Mako in her underwear. "I'm being watched... I want to tease him, who seems so innocent..." Nobuji's desires can't be suppressed, and that night, he intrudes into her futon and demands her body. From that day on, they fall into a passionate sex life, seeking each other's cocks in the intimate space closest to her husband, sweating profusely...
