Marina (a sales office lady) is under a lot of stress due to the mounting pressure at work. At times like these, she remembers an older man she dated in her student days. He used to give her SM training. She was tied up with hemp rope and played with while her body was immobile. This brings her masochistic tendencies back to life... Marina goes to see her boyfriend from back then and begs him to train her again. She is immersed in the pleasure of being trained for the first time in a long time, but she is still not satisfied and secretly asks a professional trainer to train her more intensely and dangerously. Her masochistic tendencies accelerate and she falls into a deep, dark pleasure. There is no going back... #YoroP