Harukoi Otome: Otome no Sono de Aimashō is the name give to the OVA based of the erotic visual novel (a computer game) developed by BaseSon and released on January 27, 2006. It is playable on Windows as a DVD. This HANIME is based off of the game that was released in 2008. It revolves around protagonist Akihito Hayasaka, a male high-school sophomore. The school he attends St. Francesca Academy used to be an all-girls school until it became unisex, and still has a high percentage of female students. Akihito’s adopted younger sister (Umi Hayasaka) and his childhood friend (Yuika Serizawa) are also students there. Akihito meets many girls there, and becomes friends with them.
The story of Harukoi Otome is based around a brother-sister pair that fall in love with each other, but aren’t related by blood. The relationships are near xerox copies of the ones with Naru in Da Capo and Kaede in Shuffle. Down to the same circumstances that brought them together. The beginning starts out with Umi getting really mad at her brother for reasons he can’t understand. Throughout the anime he speaks with his friends and many of Umi’s friends to figure out what’s going on. At some point in time everyone starts fucking each other.
This is a two episode OVA, each episode being 27 minutes long. They were released in 2008, shortly after the game.