NAKAIMO - My Little Sister Is Among Them!: Ani, Imouto, Koibito

NAKAIMO - My Little Sister Is Among Them!: Ani, Imouto, Koibito is a single-episode OVA that serves as the unaired 13th episode of the original television series. Released on March 27, 2013, this bonus installment continues the comedy, ecchi, and romance elements that defined the TV run. The OVA provides additional content for fans who wanted more after the broadcast series concluded, offering a standalone episode rather than a continuation of the main plot.

As an OVA release, this episode was distributed outside the standard broadcast schedule, making it exclusive to home video and digital platforms. Viewers looking for closure or extra material from the NAKAIMO series will find this episode completes the original run with all thirteen installments. The format and release method mean this episode may not have been available through traditional television channels when it originally aired.