The wealthy Asakura family is a matriarchal household consisting of the female head and her three daughters. The eldest and youngest daughters are married and have left home, but they frequently return to their parents' house, releasing their stress by dominating their servants and husbands under their mother's watch. The second daughter, Yoriko, must inherit her mother's hospital to carry on the family legacy, and thus reluctantly marries Shintaro, the second son of the aristocratic Ayahoshi family. However, this marriage hides a deep conspiracy orchestrated by her mother. On their wedding night, the unsuspecting Shintaro discovers the true nature of Yoriko and her mother—revealing their secret lives as a dominatrix and her sex slaves. This shocking revelation gives rise to a twisted new relationship.