幸せな結婚生活を送っていた結衣。旦那の仕事の都合で転勤が決まり、場所は実家に近い勤務地で働くことになり新居が見つかるまで旦那の実家に移住。旦那には浪人している弟がおり、家族からの風当たりが強いことを感じた結衣は勉強を教える事に…しかし、義弟は結衣の身体に惹かれ、あらぬ方向へ湾曲…結衣に牙をむく…。
Yui was living a happy married life. Her husband was transferred for work, and he was to work at a place close to his parents’ house, so they moved to her husband’s parents’ house until they could find a new place to live. Her husband has a younger brother who is a repeat student, and Yui, feeling that he is being treated badly by his family, decides to help him with his studies… However, her brother-in-law is attracted to Yui’s body, and he bends in an unexpected direction… and bares his fangs at Yui…

– JavGG.net