Description:

This OVA is divided into two parts. First one is about Torii Shoutarou following his younger sister on a date. Second one is about Christmas Eve, which Mitsuki, Yuuya and their friends spend at Kanzaki's house. Bundled with the limited-edition volume 7 of the manga. (Source: AniDB)

Alternative Titles:

最近、妹のようすがちょっとおかしいんだが。 OVA, Recently, My Little Sister is Unusual OVA, ImoCho, ImoCyo