After what turned into a grueling battle against formidable foes, Sekiei and Hakurei have finally returned to Keiyou and reclaimed it from its invaders—Gen and Seitou. However, while everyone is celebrating a legendary victory, one of the Gen emperor’s subjects manages to sneak in and abduct Hakurei. Meanwhile, Ei’s capital, Rinkei, is on the verge of collapse. Assured of victory despite the machinations of the scheming rats in both Seitou and the palace, Adai Dada and his army solely focused on a final showdown with Sekiei and the Chou army. And with this final, decisive battle for the Ei Empire looming large on the horizon, Sekiei faces a tough choice: Will he prioritize saving his country or saving his childhood friend and last remaining member of his family? Whatever he decides, the outcome will be the same—for when the dust settles, only one empire shall remain under the heavens.