Akihito Hayasaka, a male high-school sophomore. The high school he attends is St. Francesca Academy used to be an all-girls school, and still has a high percentage of female students. Akihito's younger sister Umi Hayasaka and his childhood friend Yuika Serizawa are also students there. Akihito meets many girls there, and becomes friends with them. But who will win Akihito's heart and cock? See his erotic sexual encounter in school.