Marin is a wife who is happy with her life, but feels unsatisfied with the sex she has with her husband. One day, her husband, who had been caught in a rape, brings over his subordinate, Kamimura. Her husband falls asleep immediately, and while Marin is entertaining him, Kamimura suddenly begins groping her breasts. He can no longer contain himself at the sight of Marin's large breasts sticking out obscenely. Letting his emotions take over, he roughly kneads her breasts while inserting his penis into her, giving Marin a pleasure she never felt with her husband. And so, Marin begins to look forward to Kamimura's return...