When I was a student, my father decided to remarry. My new mom has a daughter younger than me and her name is Miu. Miu treated me very naturally to a dull me who didn't have many friends or words. I was gradually fascinated by her pure, bright, good-natured, cute and feminine bulging body. One day, my parents will be going on a slightly later honeymoon, so I will spend a few days alone with my sister-in-law, Miu. I never thought it would turn out like that...
