I was indulging in intense, convulsive, reverse-arching sex with my beloved daughter's boyfriend. (Aoi Yurika ROE-479)

When she became pregnant with her daughter Saki, the man she was dating, who was supposed to be her husband, disappeared. Because she was a single mother, she worked tirelessly for the past 10 years to ensure her daughter wouldn't suffer. After graduating from university, she got a job, got married, and a bright future awaited her daughter. One day, she accidentally had sex with her daughter's boyfriend. Although she loved her daughter, she couldn't control the desire she had suppressed until now; an electric current surged through her body, and she was overwhelmed by a numbing pleasure…