History: The history of the world before the demonic invasion is lost. However, it is known that when the demons invaded the world of mortals, the Seraphs blessed certain humans and the lesser angels helped them fight. The seven humans who defended humanity became the seven legendary families.
During the war, they asked the elves for help, who initially refused. However, when the corruption of the Tenebris continent began to affect Yggdrasil, they eventually intervened, but not in their entirety. At that time, the elves consisted of seven clans. Three of them, thirsty for knowledge and power, began to dissect the bodies of demons and monsters. This practice created an irreparable fracture among their people.
These dissidents, who called themselves the Dark Elves, founded Babylon, a city where only science and knowledge reigned, in opposition to their conservative kin who remained faithful to Yggdrasil. In the end, the elves participated in the war, but always for selfish and particular reasons.
Meanwhile, the demi-beasts of Arcadia were too occupied with their internal conflicts and tribal wars to take part in the conflict. This was one of the reasons why they were so despised and considered savages, because they are still in conflict even today.
This war was called the Holy War of a Thousand Years, because it actually lasted a millennium before the demons voluntarily withdrew into the underworld. It was at that moment that the seven humans founded the Empire of Alexandria alongside the Holy Cathedral.
1,545 years later, Kaiser was reincarnated. And it is in the year 1548 that the novel officially begins, with the arrival of Kris (the protagonist) at the academy.