Ooarai has gotten cocky with their recent victories and the upcoming match against Pravda will bring them back to earth.

The news of the school closure has hit the moral of the team hard. The offer of surrender is beginning to look more tempting as the hours creep on, but Nishizumi has other plans.

The final battle is coming up and students are approaching Nishizumi in hopes of joining Tankery. The Tankery club is on the lookout for new tanks.

Ōarai manages to escape Kuromorimine's ambush by using a smokescreen to conceal their retreat, where they take up defensive positions on top of a hill. A fierce battle begins, with Ōarai managing to disable several of Kuromorimine's tanks. Thanks to a distraction created by the Student Council, the Ōarai manages to retreat again while Kuromorimine stops to regroup. However, in order to reach their destination, Ōarai has to cross a deep river. Unfortunately, Rabbit Team's M3 Lee stalls in the river. Faced with leaving Rabbit Team behind or risk having Kuromorimine catch up to them, Miho is reminded of her previous finals match. However, the rest her crew encourages her to go and help Rabbit Team, much to her relief. Miho takes a rope and leaps across several of Ōarai's tanks in order to reach Rabbit Team, and the other tanks tow the Rabbit Team out of the river. They then make their way to a nearby town, destroying a bridge to force Kuromorimine to take the long way around.

Ōarai's team manages to defeat the Maus through a team effort, but Turtle Team's tank is damaged and disabled. The main Kuromorimine force descends on the town. In the fierce fighting, Ōarai's tanks are picked off, but Leopon's team blocks off a doorway, cutting off Miho and Maho's tanks from the rest of Black Forest's forces. A tank duel ensues between them, and Miho barely emerges victorious, winning the match in the process. The Ōarai crew and their fans celebrate their victory, ending with a parade through the town.