Immoral Sex Education - Stepmother's Mistake Jessica Kizaki

Half a year ago, my father brought home Yoshiko. A young and beautiful woman, over twenty years younger than my father... Yoshiko began living in this house, and eventually became my stepmother. At first, I think things were going well. But from that night on, I could no longer see Yoshiko as my stepmother. The sight of Yoshiko losing herself in sex with my father. That image is burned into my mind and won't leave.