A Dark Rabbit has Seven Lives OVA

Itsuka Tenma no Kuro Usagi OVA

FINISHEDOVA★ 6.4

According to the official website, an OVA of Itsuka Tenma no Kuro Usagi was announced to be bundled with the ninth volume of the novel. An animated crossover between Itsu-Ten and The Legend of the Legendary Heroes (Densetsu no Yuusha no Densetsu or DenYuuDen) fantasy story.