A paranormal detective and a demon partner solving murders that normal cops won't touch. The show moves like a pulp mystery with a horror edge, never stopping to over-explain the supernatural world it's built. Akuma-kun's real gift isn't fighting demons, it's seeing what humans miss, and Mephisto's there to call out his blindness when it matters. Twelve episodes means it never overstays; each case lands and leaves a mark instead of spinning wheels for a season.

A boy raised by a demon takes on the strange and bizarre cases that come through the door of the Millennium Research Institute, a counseling office he runs. Known as Akuma-kun, Ichirou Umoregi is a genius of a kind said to appear only once in ten thousand years. He works as a paranormal investigator alongside his half-human partner Mephisto III, and together they solve murders and other mysteries. Akuma-kun does not know who his real family is, and while the pair work their cases, they also chase the truth about where he came from. The story is a supernatural detective buddy tale with elements of adventure, fantasy and horror, and it is framed as the adventure of the son of Shingo Umoregi, the former Akuma-kun, which ties it to the 1989 original.