[HMN-150] Seeing his father secretly having an affair with his tutor, the boy took the opportunity to fuck her.

Mina Kitano she is my tutor, Mina-sensei is my father’s lover! My mother was attending tea ceremony class every Saturday, taking this opportunity, my father asked Mina-sensei to be my tutor, so that the two of them could secretly fuck each other more easily! And from then on, every time she came to teach me, Mina-sensei would make an excuse to go out to fuck each other with my father! Because it happened many times, I got suspicious and followed sensei and witnessed them fucking each other. Not only that, every time my father ejaculated all over her pussy. With so much, sensei would definitely get pregnant! And once when she peeked at the two of them, Mina-sensei also discovered me, but not only did she not stop, she also intentionally moaned louder. After that, Mina-sensei offered me a handjob to keep this a secret. I agreed and the tutor’s illicit affair with my father continued. But in the end, I couldn’t stand it anymore! I also want to fuck this beautiful and sexy tutor! After my dad got tired and went to sleep, I went to ask Mina-sensei for permission to fuck her. Mina-sensei agreed but with one condition, I had to be at the top of the class in the upcoming exam…