The Mythical Detective Loki Ragnarok (魔探偵ロキ RAGNAROK, lit. Demon Detective Loki: RAGNAROK) is a manga by Sakura Kinoshita published from August 1999 to October 2004. A television anime based upon the manga series ran for 26 episodes from April 5, 2003, to September 27, 2003, in Japan.
Loki, the Norse god of mischief, has been exiled to the human world for what was apparently a bad joke. Along with being exiled, he’s forced to take the form of a child. He’s told the only way he can get back to the world of the gods is if he can collect auras of evil that take over human hearts, and so to do this he runs a detective agency. Loki is soon joined by a human girl named Mayura who is a maniac for mysteries, and she soon helps out in her own way. However, soon other Norse gods begin to appear, and most have the intent to assassinate Loki for reasons unclear.
[Jun 13, 2003] OP & ED: Rakuen no Tobira / Believe in Heaven
[Jun 27, 2003] Matantei Loki RAGNAROK OST 1
[Sep 26, 2003] Matantei Loki RAGNAROK OST 2
[Nov 21, 2003] Matantei Loki Ragnarok Character CD Vol. 1
[Nov 21, 2003] Matantei Loki Ragnarok Character CD Vol. 2
[Dec 26, 2003] Matantei Loki Ragnarok Character CD Vol. 3
[Jan 23, 2004] Matantei Loki Ragnarok Character CD Vol. 4