Harukoi Otome revolves around protagonist Akihito Hayasaka, a male high-school sophomore. The high school he attends 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 *hood friend (Yuika Serizawa) are also students there. Akihito meets many girls there, and becomes friends with them.

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