Akuma no Riddle

Class Black at Myoujou Academy hides a lethal arrangement: twelve assassins share a classroom with a single intended victim, Haru Ichinose. Tokaku Azuma arrives trained for the task, only to find that knowing Haru makes obedience impossible.

By choosing to protect her, Tokaku turns the rest of the class into potential enemies. Each attacker brings a different motive and method, and the promised reward gives them ample reason to persist. Keeping Haru alive also means facing the secrets and conditioning that have shaped Tokaku's own life.