After losing her father, she lives with her mother and daughter. - One day, her daughter Riona refuses a classmate's confession. - Riona was suddenly attacked from behind at home. - It was a classmate whose confession was refused. - Without hesitation, he rapes Riona and cums inside her. - When the mother returns home, she finds her daughter tied up. - A man attacks my mother again as she tries to help her! - The man does not hesitate to violate the mother as well as the daughter and cums inside her. - The man ends up living in this house. - A man's mother-daughter training is about to begin...