Nishimura, an insurance salesperson, is a masochist. However, her sales performance is declining and she is feeling the weight of stress and pressure. Then, her boss and master at work, Kashiwagi, suddenly breaks up with her. Unable to contain her masochistic sexual desires, Nishimura visits the man she dated in her student days, the master who first enslaved her. After being trained by him for the first time in a long time and experiencing the joys of a masochist, she requests more intense and dangerous training. She can never go back to normal... #YoroP