How to Train Your Demon King

While exploring the wilderness, Yan Wenan discovered a mysterious village being attacked by hundreds of demons. He accidentally got caught in a magical formation that was meant to kill the Demon King, Zhuo Yu, and somehow obtained a portion of the Demon King's soul. Since then, the Demon King has been forced to live a modern life with Yan Wenan and blend into human society.

(Source: Bilibili Comics)