Kishin Houkou Demonbane (TV)
English title: Demonbane
Japanese title: 機神咆吼デモンベイン
Alternative titles: Roar of the Machine God Demonbane, Kishin Houkou Demonbane (2006)
Type: TV
Source: Visual novel
Episodes: 12
Status: Finished Airing
Aired: May 19, 2006 to Aug 18, 2006
Broadcast: Fridays at 00:00 (JST)
Duration: 25 min per ep
Rating: R - 17+ (violence & profanity)
Studios: Viewworks
Producers: WOWOW, Kadokawa Shoten
Genres: Action, Drama, Fantasy, Romance, Sci-Fi
Themes: Harem, Mecha

Kurou Daijuuji is a poor detective living in Arkham City. One day, he was requested by Ruri Hado of Hado Financial Group, to search for a magic book. While he initially refused, Ruri offered him a large sum of money upon completion of her request, in which bribed Kuro to accept. As Kurou searches for the book, he unexpectedly runs into Al, a pretty girl that is actually a powerful grimoire. 

They forge a contract with each other, bestowing Kuro with powerful magic. Soon afterwards, Al also activates Demonbane, a deus machina owned by the Hado Financial Group, to combat the mechanical menace from the Black Lodge. With this, the war between the Hado Financial Group and the Black Lodge begins.... 

(Source: ANN)