Kikoushi Enma

Summary:
Enma, Yuki-hime and Kapaeru are demon hunters from another planet who have come to present day Japan to exterminate demons who possess humans and cause them to commit murder.

Songs: 
Ending Theme:

"DECADENCE" by GRANRODEO 

Related Links:

Official website (Japanese) - http://www.k-enma.com/
Wikipedia - http://en.wikipedia.org/wiki/Demon_Prince_Enma
Anime News Network - http://www.animenewsnetwork.com/encyclopedia/anime.php?id=6550