I've been raped by my sinful son's classmate, a nightmare-like creampie sex slave

Seika raises her son Satoshi on her own. However, Satoshi was bullied in high school and ended up truancy... It was his classmate Yuuji who made his son get back on his feet. At first, Kiyoka was saved by his kindness... In fact, he is the mastermind behind bullying, and now he has demanded money in return for helping Satoshi. Even more cocky, Eugen grabs her weaknesses and demands her ripe body. After discovering a secret that he can't tell his son, Kiyoka sends a vibrator into his crotch as he tells him...