After the Execution I Gained the Demon King System

Demons are a species known for their evil deeds. However, these demons were defeated by heroes thousand ago. Now they only remain as legends.



But there is a famous saying that * If there is no darkness in the world, then there will be no value of light in this world * That is, if there are no bad people, then there is no value of good people. Both good and evil are very important to maintain the balance of this world. If either of these two is lost, then the balance of the world will be destroyed.



In this story, our Main character is William, an ordinary man. Who wanted to live a normal life like everyone else. But fate did not want it.



He was betrayed by his most loved person. He was falsely accused of slander. A crime he never thought of committing. But he was framed and sentenced to death.



But William's story doesn't end there—it's the beginning of a new chapter.



William returns after his death, but this time he's not the same ordinary man he was. Burning with revenge, he transforms himself into the Demon King.



But this is not just a story of William's personal revenge, but an epic portrayal of the eternal conflict between good and evil, light and darkness.