Things are settling down with the two battery girls, but Hosomichi's regret is catching up to him. He believes what they fight for may not be worth the damage they cause. Meanwhile, a strange box appears in their room...

Akatsuki believes he has seen the true face of Arahabaki and finally decides to end things once and for all. Arahabaki must decide their plan of action before the True Army launches their attack. However, Hosomichi continues to hold doubts.

Hosomichi and his battery girls continue to fight desperately as the Exhibition Center approaches the final defense line. Commander Balzac tries to stop them, fearing that Hosomichi will make the same mistake as he did ten years ago.