While her husband was away on a business trip, Riko found herself spending more time alone with her brother-in-law, Daiki, whom she had always treated like a son. One day, she witnessed Daiki being bullied by a group of delinquent classmates and immediately reported the incident to the school. As a result, Daiki was placed on suspension, and Riko breathed a sigh of relief—until the vengeful classmates turned their attention to her. No matter how many times she apologized, they refused to forgive her, and from that day on, they began gang-raping her repeatedly, filling her with creampie after creampie in an unending cycle of gangbangs.