At the young age of 23, Mitsu Amai has been swept along by life's currents. She's lost count of how many men she's been with. Married to an impotent middle-aged man, she harbors no regrets—but her husband can't even handle household chores, so she indulges in daily affairs with visiting salesmen. Mitsu has forgotten love, transforming into a beast driven purely by desire. Once again today, she immerses herself in adultery with two men. Her husband returns home to catch them in the act, frozen in shock as the man on top halts his movements. But Mitsu continues riding, drunk on sex, oblivious to affection or emotion.