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.
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Characters & Voice Actors

Azuma, Mako
Supporting
Azuma, Karami
Supporting
Banba, Mahiru
Supporting
Hanabusa, Sumireko
Supporting
Hashiri, Nio
Supporting
Inukai, Isuke
Supporting
Inukai, Eisuke
Supporting
Kaiba
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