Riddle Story of Devil Special

The story is set at Myoujou Academy, a private girls' boarding school. The 10th year's Kurogumi class has 12 assassins with their sights on one target, Haru Ichinose. Tokaku Azuma is a recent transfer student who is also targeting Ichinose, but she gradually develops feelings for Ichinose.

Special episodes added to DVDs and Blu-rays.

Special "chibi-style" special included in the last Blu-Ray.

An extra episode included with the Blu-ray.