Kanna, the sales director at a Tokyo office-equipment company, is overwhelmed by unreasonable expectations, punishing hours, and a growing distance from her husband. She is also constantly frustrated with her incompetent subordinate Yoshino, until a careless moment lets him pin her down and uncover her hidden masochistic side. From then on, he takes her to a BDSM hotel during lunch breaks, branding pain and pleasure into her body until the beautiful boss is trained into her subordinate’s obedient bitch.