마도카 시즈키 - 난 항상 그녀에게 호감을 가졌어... : 1부

My father remarried and I had a stepsister. The incident happened when my parents went on their honeymoon. I was watching my sister sleeping when she came home that morning, and I couldn't resist touching her body. Suddenly, she asked me out! She was actually my dominatrix and dirty sister.