Overview
Riddle Story of Devil (悪魔のリドル, Akuma no Ridoru, lit. Devil's Riddle) was serialized in Kadokawa Shoten's Newtype from September 2012 to November 2016. The manga written by Yun Kōga and drawn by Sunao Minakata. An anime aired from April to June 2014.
External Links
Riddle Story of Devil - Wikipedia
Akuma no Riddle: Riddle Story of Devil (manga) - Anime News Network