A diligent husband working at a pharmaceutical company and his resilient wife have an ordinary, happy home. However, when the clock hands point to late night, the husband becomes the absolute master, and his wife, Misaki, transforms into an M woman who enjoys humiliation. One day, the husband lets his subordinate, Noboru, live in their house. Then, he orders Misaki to seduce Noboru and make him drink a memory-erasing aphrodisiac... But Noboru, having noticed the couple's secret, refuses the aphrodisiac and begins to train Misaki into an M woman submissive to him...
