Azumi lived a contented life in a happy family, but she began to crave more intense excitement in her sex life with her husband. However, she lacked the courage to express this desire and spent her days indulging in masturbation. One day, her brother-in-law, Koji, who lived with her, caught her masturbating. Koji blackmailed Azumi and made her his sex slave. Noticing how flexible Azumi's body was, Koji became relentless...