a masochistic tendency has sprouted, and a taboo bondage training. My uncle, a university professor... I was receiving private lessons from him during the summer vacation. The guidance was strict, and I was punished for mistakes. My skirt was flipped up, my panties were moved aside, and my ass was spanked. One day, I found a photo book of a woman bound with hemp rope in my uncle's room. "This person is very beautiful," I said to myself as I bound myself and masturbated. When my uncle saw me like that, I was subjected to a severe punishment...