Mitsuki is working as a new concierge at a luxury hotel in Tokyo. One day, she visits a customer to deal with a complaint, but ends up further infuriating the customer by saying that she has a bad attitude. A few hours later, she is called to a room by name, and when she goes there, the customer strangles her and makes her lose consciousness. When she wakes up, Mitsuki is restrained and at the mercy of the man, and is raped. Deep throating, toy orgasms, raw sex and creampie. Mitsuki's mind gradually breaks down as she is subjected to terrifying confinement and training.