DASS-998 — I took in a cheeky, handsome young relative, only to find out he was actually a beautiful girl. For four days, she kept teasing me with "Uncle, is that your taste?", and in the end, we had sex to teach her a lesson, and we decided to live together. (Kuramoto Sumire)

My cheeky relative, whom I thought was a boy... College student Sumire finds herself without a place to stay for four days due to moving troubles, and ends up staying at her relative Keisuke's house. Keisuke mistakes the sassy Sumire for a boy, but when he helps her in need, he discovers she's actually a girl, and they begin to be drawn to each other...