Yui is a perverted masochistic mother who has been trained by a man she calls Master. One day, the man orders her to offer her daughter Urara as a slave. Feeling that she will be abandoned if she refuses, Yui decides to offer her daughter as a slave. While her daughter is out, she seduces her daughter's boyfriend and shows her her wild bondage sex. Urara, who has masochistic blood in her veins, gradually begins to feel sexually aroused, and both mother and daughter sink into the swamp of bondage training. #YoroP