Over the Rainbow (Yggdrasil Final Chapter)

For hundreds of years, warfare has continued on both the east and west sides of the United Kingdom. Although they manage to maintain the battle lines through differences in weaponry, the kingdom's total population of only one million—its national strength—means that the war against the demon army, whose forces alone exceed one hundred million, is likely to continue for a long time to come. Then, in a certain year, the United Kingdom finally decided to launch a counteroffensive. A story begins in which Akira and Jung, working together with the United Kingdom, aim to annihilate the demon army.