The Demon King Was Originally the First Generation of Brave Men

The majestic first-generation brave mage Mobius went through many difficulties and dangers and came to the Demon King on the path paved by the corpses of his companions. In the end, the Demon King directly handed over the throne? ? ———————— The brave man is the one appointed by Yggdrasil to defeat foreign enemies. The Demon King is the manager of the demon domain appointed by the will of the demon clan. ... I hit myself? Or is it that the foreign enemy has other intentions? "I'm already a brave man, how can the demon's will still allow me to become the demon king?" "I'm already the Demon King, how come Yggdrasil still allows me to be the second generation hero??!" "Why do the demons still have rebels?" ———————— The Demon King who was originally a hero has become the new hero? But when Mobius wore a vest and mixed in with the juniors, he found that his teammates were also weird: A chatty archer from the Elf tribe, two warrior brothers who were elected brave together, and a priest who spoke incomprehensibly... Everyone seems confused about the target? …Then let's be rash and respectful! (RPG+Team+Adventure+Reversal+Science Popularization?)