Riddle Story of Devil is a Japanese manga series written by Yun Kōga and illustrated by Sunao Minakata. It started serialization in Kadokawa Shoten's Newtype magazine with the September 2012 issue. An anime adaptation directed by Keizō Kusakawa and animated by Diomedéa premiered on April 3, 2014. The series is licensed for streaming by Funimation in North America and Madman Entertainment in Australia.