Alisa Mikhailovna Kujou é considerada o ídolo de seu instituto. Ela conquistou o coração de inúmeros alunos do sexo masculino e é admirada por todos os outros, mas todos desconfiam dessa garota quase perfeita.

Tsubasa, um estudante de Tóquio, é transferido para a cidade de Hokkaido, no norte do Japão, e lá conhece belas garotas.

It has been 2 years since the GCC raid in Anteiku. Although the environment in Tokyo has changed drastically due to the CCG's increased influence, Ghouls are still a problem, especially the Aogiri Tree organization.

Tokaku Azuma has just transferred to the elite Myoujou Academy, a private girls' boarding school. But there's a catch: she, along with 11 of her fellow students in Class Black, is an assassin taking part in the challenge to kill their sweet-natured classmate, Haru Ichinose. Whoever succeeds will be granted their deepest desire, no matter the difficulty or cost. However, each assassin only gets one chance; if they fail to kill her, they will be expelled. Despite the extraordinary reward, Tokaku decides to take a different course of action. Though Haru is her target, the young assassin soon finds herself drawn to the very girl she is supposed to kill. With the entire class out for Haru, Tokaku refuses to let her friend die, vowing to protect her from a growing bloodlust.