Two OVA episodes are bundled as DVDs with each of volumes 6 and 7 of the manga. The first OVA is a prequel story written by the manga's author. Before the beginning of the main story, Rea and Chihiro have already met at a certain place: an outdoor hot-spring bath. The second OVA takes place after the series (effectively episode 14). The Furuya family finds a mysterious young girl hiding under the household temple.

Extra episode included on BD/DVD vol. 6; effectively episode 13. Despite their decaying bodies, Rea’s zombie power comes in handy both at school and at home, and Babu gets interested in another cat—although this particular feline is one of the living. (Source: FUNimation)

Arslan Senki (TV): Dakkan no Yaiba retells the events of the series' first 13 episodes, summarizing the events that transpired from Arslan's escape with Daryun, to their time in the Peshawar Citadel.

Unaired episode released with the seventh volume of the Blu-ray & DVD. It consists of three short episodes newly written by the manga author Fujiwara Cocoa. Fujiwara also designed a new character called Hana-chan for the episode.