Ichinose Haru is a student at a private girls' boarding school, Myoujou Academy, who is being targeted by 12 assassins disguised as students. Azuma Tokaku is a transfer student and an assassin who also initially targets Haru, but develops feelings for her and decides to protect her from the other assassins.

Source: ANN

Note: The first episode received a Niconico live broadcast on March 31, limited to 10,000 viewers.

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