Gunparade March: Arata Naru Kougunka

Decades of war against mysterious creatures have brought humanity close to extinction and forced students into military service. In Kumamoto in 1999, Atsushi Hayami and his classmates serve as Unit 5121, operating humanoid combat machines against the threat.

Between dangerous deployments, they still have lessons, friendships, and feelings they do not know how to express. For Hayami, Mai Shibamura, and their companions, surviving the war also means preserving something of the youth it threatens to take away.