Riddle Story of Devil - S01

Tokaku Azuma transfers to Myoujou Academy, an exclusive girls' boarding school, only to discover a grim secret. She and the eleven other students in Class Black are assassins, each tasked with killing their kindhearted classmate, Haru Ichinose. The one who succeeds will have their greatest wish granted-no matter how impossible. But there's a catch: if they fail, they're expelled from the school. Despite the promise of any reward, Tokaku chooses a different path. Though Haru is her target, she finds herself inexplicably drawn to the girl she's supposed to kill. As the rest of the class closes in with deadly intent, Tokaku makes a promise-she won't let Haru die. Even if it means standing against her fellow assassins, she'll protect Haru from the growing bloodlust around them.