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.
![Ayaka Suwa. Actor of Akuma no Riddle [Audio: Eng]](/addons/img/icons/actor_placeholder.png "Ayaka Suwa. Actor of Akuma no Riddle [Audio: Eng]"){kind=icon}