Following the fall of the Azuma kingdom, survivors press onward in a futuristic armored vehicle toward Osaka, determined to face the Overfiend and settle their fates. Their path leads them into an unsettling realm where children wield absolute authority over adults under the command of Ellis. Amano Jyaku must act swiftly to protect his companions from this dangerous society. At the same time, Yoenhime summons Munhihausen and undergoes a profound change into Yoenki, seeking vengeance while hidden motives begin to surface.