Erika returns home alone to the family home of her husband, Naoto, the third son of three brothers. That night, Erika tells Naoto's family, who welcome her warmly, about her affair with him. When her brothers find out that Erika is sexually frustrated, they attack her, and her father-in-law, fearing that she will not be able to produce an heir, ejaculates inside her with his own sperm in an attempt to impregnate her...