This is the conclusion to Girls und Panzer: Little Army, a two-volume prequel to dieselpunk-infused Girls und Panzer, which juxatoposes cute girls and their high school antics with dynamic tank battles and military tactics.
Miho is determined to bridge the gap of animosity between her best friend Emi and her sister Maho, and arranges a Tankery practice match between the two teams. After the match, Emi gains admiration for Maho as a person, but is perplexed by Maho's absolute ruthlessness on the field. This new revelation also shocks Miho to the core, as she tries to accept that her sister's-and her family's-Tankery style run contrary to her own values. Family ties and precious friendships will be tested as Miho ponders whether she is even cut out for Tankery to begin with.