Reiko Nozawa, Shizue Sakamoto, Emi Kato, and Takashi Toda went mountain climbing. Takashi was in a love triangle with Emi and Shizue. Shortly after setting up camp by the river, Emi witnesses Takashi and Shizue having sex. She ran into the woods. But suddenly, she is attacked by someone...
A high school girl who lives with her newlywed sister and her husband. She masturbates every day, becoming frustrated by the extreme sex voices of her older sister and her husband. Her energetic sister is not satisfied with just her husband, and she also has an affair with a salesman. Her sister sees this and seduces her sister's husband without telling her sister...
