Hana, the secretary, turns to a group of men for help in ending her relationship with her stalker-like boyfriend. However, the intimate encounter she shared with them—promised to be a one-time affair—is secretly recorded and used to blackmail her. Meanwhile, Yuka, the female doctor, once lived under the control of these same men, but now appears to have moved on, happily married and a mother. Yet unable to forget the pleasure of being dominated, she responds once again to their summons. The two women, whose paths should never have crossed, meet in this sweet room. Here, they become entangled in a twisted relationship of mutual submission and relentless training.