Four years into their marriage, a couple lives happily together, saving diligently to buy their dream home. Then, the husband lands a major promotion. To celebrate, they invite his boss over to their house. That night marks the beginning of a master-servant relationship between the wife, Miki, and her husband's superior. Miki becomes the boss's sex slave, finding pleasure in extreme degradation and humiliation, spiraling out of control. The once faithful and modest wife transforms into a depraved woman, embracing her new role as a creampie-filled cumdump for her dominant master, while her husband remains oblivious—living the ultimate NTR nightmare.