PARATHD-04322 A serious younger sister attending nursing school and a forbidden relationship — when I became a practice partner for her training, she carefully washed me and I got fully aroused. I couldn’t hold back and ended up going too far

I live with my father and my younger sister, Yuzu. She is studying at a nursing school to become a nurse. Since her clinical training involves many male patients, she asked me and my father to help her practice. Naturally, that made things awkward. Yuzu is cute, has no boyfriend, and isn’t used to being around men, so she struggles with male patients during training. She says she has to deal with shaving and looking at male anatomy, so she asks me and my father to be her practice partners. She practices shaving on me, and when she touches even the area behind the testicles, I can’t help but react. She also asks my father to help her practice bathing assistance. Since she isn’t used to seeing male anatomy, she wants to look carefully and wash properly, which ends up being very intimate. Then there’s a practice session with me for a semen test procedure, and in the end, we cross a line we shouldn’t have.