Mio, who lives a happy marriage, is a hard-working career woman. However, one day, she is called by a client who was supposed to have signed a contract with her and is told that the contract is to be terminated. Shaken by the suddenness of the situation, she immediately kneels down and begs for the contract to be continued. "If you insist, I'll have you indulge in my hobby," the perverted old man from the client says, tying her up with a rope and forcing himself on her. After that, she is called in again and again...