Do you like beautiful ladies?
A secret study between an older sister and a boy! One shota illustration collection! I'm Rina. I was often asked to babysit at my close friend Yuuta's house in the neighborhood. Even as Yuuta grows up, he becomes more and more cute. ah! I can't stop feeling excited when I look at Yuuta-kun? I'm Yuuta. I love Rina-chan who always plays with me. Lately, he's been acting like a grown-up, which makes my heart flutter. I want to get along better. The two best friends decide to study about the bodies ...