Dumbass Saga

One day in an era when swords and magic dominated, the hero Mokkos was asked by Zhang Woo Ping, the king of the royal capital of Zaidama, to subjugate the Demon King (Maho Yamada). Mokkos sails to the island where the Demon king lives. Once there, Mokkos easily defeats the Demon King's monsters and her lieutenants, The Four Heavenly Kings, however after a fierce battle, he is defeated by the Demon King herself. However, instead of finishing him, the Demon King welcomes Mokkos, and begins to tell the truth about the origin of the demons over 900 years before.