Nakaimo OVA Announced
A Kono Naka ni Hitori, Imouto ga Iru! (Nakaimo – My Little Sister Is Among Them!) OVA will hit Japanese Blu-ray on March 27, 2013. The disc will contain the unaired 13th episode of the TV anime series plus commemorative coverage of the July 16 NakaImo publicity event.
Source: Anime News Network