Yako's father was murdered in a locked room. She then meets a man named Neuro Nougami who is a demon from Hell who eats "riddles." He forces Yako to act as a detective so he can solve mysteries. Neuro longs to eat the ultimate mystery.
Last Episode01x25 The Most Aired: Mar. 25, 2008
Neuro is stabbed by spears over an altar that drains his power, and Sai is about to cut him open until Yako stops him. Yako reveals she has figured …
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