Mythical Detective Loki Ragnarok

Exiled to the human world by Odin and shrunk into the body of a small child, Loki, yes, the Norse god of mischief, has only one way back: collect evil auras corrupting human hearts, so naturally he opens a detective agency. As you do. Running the Enjaku Detective Agency with his loyal assistant Yamino, Loki takes on paranormal cases while trying to keep a low profile, which becomes impossible once Mayura, a high school girl with an almost unhinged love of mysteries, stumbles into his life and basically refuses to leave. She has no idea he's a god. She just thinks the cases are cool. The early episodes follow a comfortable case-of-the-week rhythm: something strange happens, the trio investigates, there's usually a spirit involved. It's lighthearted and a little goofy, leaning more into the comedy than the supernatural dread. But there's a slower-burning thread underneath involving other Norse gods showing up in the human world with very different agendas toward Loki. If you enjoyed the warm, episodic pacing of Natsume's Book of Friends or the mythology-meets-modern-world charm of Kamisama Kiss, this sits in similar territory. Fans of Detective Conan's kid-detective setup will also find the premise familiar, though here the tone stays consistently playful. It's a 26-episode TV series from 2003, so temper your expectations on production quality, but the concept is genuinely fun and the character dynamics carry it well.