Minami Kozue, a young married woman working at an IT company, applies as an esthetician at a high-end no-handjob men's spa. Though newly married for just one year, she faces an urgent need for cash due to a special personal situation. With zero prior massage experience, she receives careful training from a female instructor, culminating in one-on-one practical lessons with the shop manager. However, an unexpected turn of events occurs when Kozue suddenly asks, "Do you offer backroom services?" The manager responds with surprise. Her true motive is revealed—she's been having an affair with her company superior, which has now been exposed to his wife, forcing her to pay damages. Desperate for money, she seeks out backroom work. In a shocking twist, forbidden backroom sex ensues. Witness the dramatic progression of Kozue's relationship with the manager within the authentic world of men's esthetics.