Riddle Story of Devil

Riddle Story of Devil is an action-drama TV anime produced by diomedéa, directed by Keizo Kusakawa, with series composition by Ayuna Fujisaki. Based on the manga by Yun Kouga, the story plunges viewers into a deadly classroom where twelve elite assassins compete to eliminate the seemingly ordinary Haru Ichinose. When Tokaku Azuma defies her mission and vows to protect her instead, a breathtaking battle of wits and blades begins. With a cast of uniquely compelling killers and a narrative packed with tension and dramatic twists, this series delivers non-stop thrills for fans of action and psychological drama.

Myoujou Academy appears to be an ordinary private boarding school for girls, but behind its elegant walls lies a deadly secret. Within the 10th year's Kurogumi class, twelve skilled assassins have quietly enrolled — each one with a single, shared objective: to eliminate their classmate Haru Ichinose. What makes Ichinose such a coveted target remains shrouded in mystery. Into this dangerous classroom steps Tokaku Azuma, a cold and capable transfer student who has also set her sights on Ichinose. Trained from a young age in the art of killing, Tokaku seems like just another hunter in a class full of predators. Yet as she spends more time alongside Ichinose, something unexpected begins to stir within her. Set against the backdrop of a school where trust is a luxury no one can afford, this story explores what happens when a world built on violence is quietly disrupted by an unforeseen bond.