While my parents went on a trip, I (Madoka Susaki) was left at my relative's house. I decided to live with my cousin's beautiful and free-spirited older sister (Ameri Hoshi) for a while, but Ameri kisses her, touches her body, and gets mischievous. The other person's body is also soft and it feels like it's the first time. I fell in love with it ...! ??