[ROE-510] I drowned in intense convulsive and backward sex with my beloved daughter's boyfriend.

Just as she became pregnant with her daughter Suzune, the man she was supposed to be her husband at the time lost contact with her. For the past ten years, I worked desperately so that my daughter wouldn't have to struggle because of being a single mother. After graduating from university, she got a job, got married, and a bright future awaited her daughter. One day, she unexpectedly became involved with her daughter's boyfriend. Despite his love for his daughter, he couldn't control the desires he had been suppressing until now, and was overwhelmed by an electric shock that sent him numb to the bone...