This is the nineteenth chapter of Nihonkoku Shoukan Manga.
Summary[]
A group of ambassadors of the Rodenius Continent hold a small informal meeting at a Japanese cafe to discuss Japan's benign influence over their nations. Though a matter of concern is Japan's attempts to make diplomatic contact with the Parpaldia Empire.
At Tormeus Castle Gai and Moah report of what happened at the Doors of the World and of the Demon Lord's return. Orders are issued to report this to the royal capital. As the soldiers make prepares for war, the commander browses his library finding a tome of the Topa Kingdom's history. In which in the distant past the Demon Lord's army was driven away back to the Grameus Continent thanks to the Four Heroes and Emissaries of the Sun God. According to legend the Emissaries of the Sun had left the world, returning through a strange portal.
The Topa Kingdom had then sent an expedition of a thousand men to penetrate the Grameus Continent to strike at the Demon Lord led by the Four Heroes. The heroes managed to seal the Demon Lord, at the cost of one of their own. In the end only the beastman hero Kenshiva returned to tell the tale, warning that while the Demon Lord was sealed away he would eventually awaken in the future.