A masochistic tendency has arisen, and immoral bondage training has been undertaken. My uncle is a university professor... I was taking private lessons from him during the summer holidays. He was strict and punished me when I made a mistake. He would lift my skirt, push my panties aside and spank me. Then one day, I found a photo album of women tied up with hemp rope in my uncle's room. "This woman is so beautiful," I thought, masturbating while tying myself up. My uncle found me like that and severely punished me...