Mother remarries, the daughter becomes a "sex slave" for the stepfather

My father passed away when I was young, my mother had to work hard to raise me alone. When my mother wanted to remarry Shinjo-san, although I was not confident about this man, seeing my mother happy made me happy too. But my worst fear came true, this man turned out to be a pervert, taking advantage of my mother's absence, he used force to take over my body! Despite that, when I see my mother happy, I can't bring myself to tell her about this. I had to endure being dirtied by this stepfather over and over again. At the doorway, in the hallway, in the bedroom.

.. As long as I avoided my mother's sight, he forced me to serve him anywhere and anytime...