Hitsugi no Chaika: Nerawareta Hitsugi/Yomigaeru Iseki
English title: Hitsugi no Chaika OVA
Japanese title: 棺姫のチャイカ ねらわれた棺 / 蘇る遺跡
Type: OVA
Source: Light novel
Episodes: 1
Status: Finished Airing
Aired: Mar 10, 2015
Duration: 23 min
Rating: R - 17+ (violence & profanity)
Studios: Bones
Licensors: Sentai Filmworks
Genres: Action, Adventure, Fantasy, Romance

Unaired anime-original OVA bundled with 12th volume of the Hitsugi no Chaika novel.