In a near-future Japan shaped by civil war, high school students are organized into armed “volunteer” units to help maintain order.

Shimon Hanazawa decides to enroll at Seishin Girls’ Academy as a trooper, an unprecedented move for a prim and proper Advanced Placement student. But she ends up placed under the direction of Momoko Takasaka, the most unruly and unpredictable student around...

Does Shimon have what it takes to survive Momoko's chaos...and the battlefield itself?

(Source: Kodama Tales)