Mistress Minami Nijiyama keeps two male servants in her mansion and decides to take in a new female servant. The female servant tearfully pleads to return to her original master. The mistress offers a condition: "Listen to my words, and I'll let you go," leaving the woman no choice but to obey. From then on, the female servant undergoes frequent training sessions alongside the male servants, gradually awakening her masochistic instincts and beginning to crave them. Eventually, she faces a final decision: return to her original master or spend the rest of her life in the mansion. Which will she choose?