[Sort of. Actually, there are two countries in Grameus. One is Esperanto Kingdom, which is formed from the supposed reinforcements of the Four Heroes and two, the Demon Kingdom of Heiskanen, but they are not really bad. In the WN short story "The Forgotten World" and Nihonkoku Shoukan Gaiden 2 "Lone Warrior", that kingdom was forced into servitude by an officer of the Annonrial Empire. The said officer kidnapped its princess which is the caretaker of the force filed of the country and brainwashed her knights to fight the kingdom. After the brainwashing device was destroyed and the battle was over, Esperanto and Topa finally connected via a highway and railway to Grameus (so the gate was renovated), along with Heiskanen. As for the remnants of the Demon Lord, yep he has a castle further north and Japan and Holy Mirishial Empire conducted a follow up operation to destroy those pests and gather information./spoiler]