Rosie chalks her dad Warmaster Wohlks’ post-battle transformation to an infant as a curse of the Demon Lord, but he’ll recover in a couple hours. In the meantime, Rista, Eruru and Mash are eager to explore the town, drink, play casino games and shop, but Seiya forbids all forms of fun and entertainment. After all, the war isn’t over.
His overcautiousness comes in handy when Rista is tricked into being separated from the rest of the party by Wohlks, who it turns out is now a worshipper of the Demon Lord, having concluded defeating him isn’t possible. He also possesses a goddess and hero-killing “God Eater” sword that he immediately uses on Rista, only to be interrupted by Seiya, who decided to double-check on her out of an abundance of…you know.
A smouldering battle ensues within the cathedral, with Wohlks swallowing a Demon Spirit Orb to transform into a young Demonkin warrior, and for the first time Seiya actualy meets his match. When the God Eater shears off one of Seiya’s arms, things look bleak, but it was all part of Seiya’s plan. Due to his mastery of Valkyrie’s special skills, Wohlks also loses his arm as a result of taking Seiya’s, giving the Hero the opening he needs to dispatch him.
After falling, Wohlks transforms back to an old man, but with the mind of a child. Roselie turns away, not considering the traitor her father anymore. Seiya, demonstrating uncharacteristic emotional intelligence (though of course executing it in the worst way, by slapping the shit out of her face again), urges Roselie to say goodbye to her father before he passes away or she’ll regret it forever. She does, and gets one last wonderful head pat, and then ascends to the throne.
While Seiya recovers over three days, Rista encourages Eruru and Mash to have fun in town while they still can…only Seiya wakes up in the middle. Yet, surprisingly, instead of pooh-poohing Rista’s suggestion, he seconds it, saying two or three days of R & R won’t hurt. After that, it’s on to the toughest opponent yet, the Demon Lord himself. In what new ways will Seiya prepare himself for the final boss?