When I was a student, my father decided to remarry. My new mother has a daughter who is younger than me and her name is Miu. Miu treated me very naturally because I had few friends and few words. I was gradually fascinated by the pure, bright, good-natured, cute and feminine bulging body. One day, my parents went on a honeymoon a little late and spent a few days alone with my sister-in-law, Miu. I never thought that would be such a thing ...