Recently, My Sister is Unusual OVA
Saikin, Imouto no Yousu ga Chotto Okashiinda ga. OVA · 最近、妹のようすがちょっとおかしいんだが。 OVA
Synopsis
OVA bundled with the limited-edition 7th volume of manga. It includes an "exclusive, prohibited" episode that cannot be aired on TV.
Studios: project No.9
Source: MANGA