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)

Short specials included with the DVD's of Okane ga Nai series.

A diminutive pink creature orbiting in space called "Kirby" crash lands into Dream Land. Once getting acquainted with the citizens who live there in Cappy Town, he begins to defend the town from the monsters that King Dedede, the self-proclaimed ruler of Cappy Town, orders from the evil Nightmare Enterprises. (Source: ANN)