Sisters Ai and Hikaru, who lost their mother, lived with their father who runs an inn, but they had a hard time and their father was hospitalized. The troubled older sister decides to work as a sister. However, the customer who came was a business fund borrower, which was the source of his father's efforts. They look at their sisters, deceive their sister Hikaru, and take advantage of their bodies ... The video of the scene was shown to her sister, Ai, and she threatened her. Eventually, her sister's heart and body were all raped and she was trained for continuous vaginal cum shot inevitably.