Majin Tantei Nōgami Neuro (魔人探偵 脳噛ネウロ) is a manga series written and illustrated by Yūsei Matsui.
The series' central character is Neuro Nōgami, a demon who eats mysteries. Because he has eaten every mystery in the demon world, he comes to the human world to feast on the mysteries offered by humans. Because he is a demon, he does not want to make his presence in the human world widely known. He makes an arrangement with a 16-year-old high school girl Yako Katsuragi—who initially wants to solve the mystery of her father's murder, which was declared a suicide by the police. They establish a detective agency and, together with former criminal Shinobu Godai and a sentient braid of hair called Akane, solve crimes to feed Neuro's appetite.