The private tank squad, Rabbits, is tasked with defeating the rampaging magical weapon, the stray tank, born from a past war. Nina, who participates in a large-scale operation to protect the city of Anfurek as a gunner, joins forces with twin tank drivers, Cynthia and Monica, and manages to achieve a hard-fought victory. However, waiting for Nina, who rejoices in their victory, is the cruel reality of her comrades' deaths. Having fled from the battle, Nina finds herself face to face with a man who can be considered the root cause of the war…!!