Neuro NÅgami, a demon who feeds on mysteries and puzzles. One day Neuro decides to come to the human world to feast on the puzzles offered by Humans who release negative enegy from their planned crimes. As a demon, he must not make his presence noticed by the humans as it's the law in the human world. Because of this, he makes a permanent deal with Yako and together they solve crimes for Neuro's appetite. After solving many crimes, a case caused a Criminal named X to take an interest in Neuro as a demon. After a third attempt on Neuro's life, X is caught by an organization called "The New Bloodline" with Sick's as its leader. His goals involve wiping out the human race. Because Neuro's food is created by humans, Neuro prepares his battle with The New Bloodline.
contains episodes 1-25