), written and illustrated by . The story follows the absurd school life of Yasuna Oribe and her best friend Sonya, who happens to be a highly trained (and easily startled) assassin. Core Premise and Characters

: An airheaded, fearless girl who constantly tries to befriend Sonya, often leading to broken wrists or being put in a headlock.

The series centers on the "heartwarming" but violent relationship between two high school girls: