“You make such pretty noises, boss… Learn to enjoy the pain.” Ayano is a sales chief at a metropolitan insurance agency who has sacrificed everything for work while her marriage turns cold. Expectations keep mounting, and even her incompetent, well-connected subordinate Yoshino adds to her stress. When she accidentally shows weakness in front of him, he recognizes the submissive desires she has always buried. Exploiting them, Yoshino summons her to a hotel during lunch breaks and uses SM pain and pleasure to build a secret master-and-servant relationship that reverses their roles at the office, drawing her into an adulterous affair.