The third exclusive! Kiho Ichinomiya's first challenge to the drama! The electricity and gas stopped at my house, so I decided to stay at her house. She has a younger sister, and it's the first time she's met her... He seems to be wary of me. - That night, she refused to have SEX, and when she was masturbating, her sister saw it! - She's a sister who seems to be weak in pushing, so maybe this will be ... - A week when I secretly my sister without telling her. Gradually, my sister's temptation escalated ...