A faint memory of a youth in which my parents were engrossed in love with their big-breasted, cute step-sister on their honeymoon, forgetting their rationality and sought out each other.

When I was a student, my father decided to remarry. My new mother has a daughter younger than me and her name is Nene. Nene treated me very naturally with a dark personality and a small number of words. I was gradually captivated by her innocent, cheerful, good-natured body, and her cute, feminine, bulging body. One day, her parents end up on a slightly late honeymoon and spend a few days alone with her step-sister Nene. I never thought that it would turn out like that...