Ryu is a woman who performs her job well but carries an aloof, mysterious aura. Remi, who had long been intrigued by her, is a lewd married woman who, before marriage, secretly underwent M training from a man other than her husband. One day, the two end up on a company retreat to a hot spring resort. By chance, they meet in the bath, where Ryu discovers Remi's hidden sexual desires. From that moment on, their relationship takes a dramatic turn.