is a shōjo manga series written and illustrated by Kaori Yuki. Originally serialized in Hana to Yume from February 1995 to February 2001, the chapters were collected and published in twenty tankōbon volumes by Hakusensha; the first volume was released in 1997 and the final volume was published in 2001. It focuses on a reincarnated angel named Setsuna, proclaimed to be the "Messiah", and his struggle against the corrupted angels of Heaven.
The manga was adapted as a three-episode OVA by Bandai Visual and Hal Film Maker; it was intended to be an introduction to the manga rather than a stand alone anime. Originally licensed by Central Park Media, the OVA is currently licensed by Media Blasters. A series of drama CD based on the other story arcs was also released.
Angel Sanctuary is licensed by Viz Media for an English-language release in North America. The final volume was released June 2007.
In this series, Assiah (Earth) and the upper levels of Hell (Gehenna) are mirror images of each other. As mankind polluted and destroyed the Earth, the lands of Hell also began to weaken. Taking advantage of their creator's sleep and the weakening of their enemies, the angels of heaven wage war on the Evil race (a group of demon who have turned away from the Devil, Lucifer and God; they live in Gehenna and worship "Holy Dragon Gods"), wiping most of them out. In doing this the angels fighting the war are corrupted. They commit vile crimes and murders under the name of God and righteousness. This deeply sickened Organic Angel Alexiel. She feels that the Evils are more pure in their actions since they do not put up a charade of purity to cover their crimes. She joins the Evils' side of the war and declares an official revolt against God.
Read more about Setsuna Mudo at Wikipedia ...
Official Site: Central Park Media
Links: Wiki Angel Sanctuary Absolute Anime Setsuna Mudo Angelfire entry Setsuna Mudo