The story is set at Myoujou Academy, a private girls' boarding school. The 10th year's Kurogumi class has 12 assassins with their sights on one target, Haru Ichinose. Tokaku Azuma is a recent transfer student who is also targeting Ichinose, but she gradually develops feelings for Ichinose.

The main lead Tokaku Azuma, The bad ass hand to hand combat master, voiced by the same woman who voices sucking girl in my hero academia and in the series danganronpa plays a character that has no point and you didn't remember existed till we showed you this clip of her.