Yuui, who had been leading a happy married life. Due to her husband's work, they decided to transfer, and she would work at a workplace close to her hometown. Until they found a new home, she moved to her husband's parents' house. Her husband had a younger brother who was studying for his exams, and Yuui felt strong resistance from the family. She decided to teach him, but her brother-in-law was attracted to her body, and the situation took a wrong turn... Yuui bared her fangs...
