My new wife's daughter Kokoro is a slightly unusual high school girl who wears only a thong at home! Even though I try to control myself by telling myself that it's not good to be attracted to my stepdaughter, her plump peach butt is always in front of me, so I'm always rock hard! And after a certain incident, we finally enter into an inappropriate relationship... The pleasure of the immoral sex I have with her pure white body, when my wife isn't looking, is just too much!