Nina to Usagi to Mahou no Sensha

During a time of war, individuals with magical abilities were required to power tanks by biting enchanted plates. Although the war officially ended, uncontrolled magical tanks continue to cause chaos. Nina, who was forced to use her magic for years to fight these rogue tanks, is now homeless and struggling to survive. When she tries to steal food, she encounters a group of girls operating their own tank. Instead of punishing her, they offer her shelter. The girls are part of a private tank unit known as the "Rabbits," who defend their town from the rogue tanks. Initially wary of their kindness, Nina gradually learns to trust them. She joins the Rabbits, using her abilities to help protect others.