In a post-war era where individuals with magical abilities powered tanks through biting magic plates, rogue magical tanks continue to sow chaos. Nina, once coerced into fueling a war tank, now faces destitution and hunger. Caught stealing food, she encounters a compassionate group of girls who operate their tank. Embraced by this clan known as the 'Rabbits,' defenders against rogue tanks, Nina hesitates to trust their goodwill after enduring past mistreatment. However, she soon learns to rely on their sincerity. Joining the Rabbits tank squad, Nina pledges her strength to safeguarding others.