Story
OVA — Spring 2012, 3 episodes, Finished.
Episode 1: The story is about a brother Ani and his younger sister Kasumi who begin developing feelings towards one another. Episode 2: It's a love story of Sahara Satoshi and Aoba Chinatsudo walking to the same school. Episode 3: Is the story of Makoto and Kouichi.
Synopsis via AniList (English).
