![](https://cdn.animecharacters.io/images/anime/large/4713-88f2d77f.jpg)
Format
Special
Episodes
1
Episode Duration
16 min
Status
Finished Airing
Premiered
Aired
2009-05-22 to ?
Source
Novel
Rating
R - 17+ (violence & profanity)
Genres
Mystery
Historical
Supernatural
Suspense
Studios
Madhouse
Producers
Licensors
Mouryou no Hako: Chuuzenji Atsuko no Jikenbo - Hako no Yurei no Koto (魍魎の匣~特別編 中禅寺敦子の事件簿「箱の幽霊の事」)
A side story that reveals the investigative notes that Atsuko, the younger sister of the main character Akihiko Chuzenji, wrote about the brutal dismembering incidents in the main story. (Source: ANN)