Neuro is a high being from the underworld. He likes to eat riddles and mysteries, a sadist and bully Yako (the girl protagonist). He aims to eat the ultimate riddle capable of satisfying his insatiable hunger. So he surface to above world , the human world in search for his goal. He arrives in front of Yako Katsuragi whose father had been murdered. Neuro then smells a tasty riddle on the case. He offer Yako his help to solve the death of his father. In return, he forces Yako to act as a detective and went on search for riddles to satisfy his hunger.
Neuro being self-centered character wanted to make Yako a bigshot detective in order to attarct more human customers. A chance came by when a tasty riddle of a superstar came to them. As they solve the mystery the popularity of Yako as a high school detective also rise. They often stumble with the police investigation team making more connection both in good and shady manner as they employed a former gangster to their detective agency.
Upon meeting a great mystery in the identity of Kaitou X, a known thief and murderer dub in Red Box Neuro discover a much tasty puzzle. But X is the least of his worry as 6 who calls himself the leader of new generation who are genetically different wants to wipe out human. Without humans the ultimate riddle might be loss. Those he and Yako made their move and protected their source food.
AS the story develop and progress both Neuro and Yako has shown a development to each other. Neuro found himself protecting Yako from the great danger. Not only because they are partner but because he finds her more interesting. To the extinct that he wanted to understand human brain and emotion. Moreover, after the fight with 6 and his five right hands he was out of power and gradually disappearing. The only solution to regain his health and life was for him to return in the underworld. Neuro finds himself unable to do that. He is worried to left Yako behind.
Majin Tantei Nougami Neuro or Demon Detective Brain Eater Neuro is a completed 202 chapters with an average of 30 pages per chapter. It is not your normal detective shounen as it involves supernatural ability and mystery beyond norms. It has a great plot story and character development. As well as the riddles/cases are very well written. That you cannot expect it. No boring moments. A 10/10 to me.