Demon king in modern world

Many decades ago a war took place between demons and humans. In this war the humans were the one who were winning but it was just a matter of time before the Demon king decide to interfere. The Demon king was the strongest of all and no one was able to defeat him and the humans were trying their best to defeat him but at the end Demon king was the strongest. After many tries the hero's were exausted but the demon king was still standing strong and after many hours of fight the demon king shouted ' I am Regis voltord the Demon king i am the strongest and no one can defeat me ' by hearing this the hero said ' You can be the strongest but we will not lose hope and we will fight you till death'. After many hours of fight the Demon king was the one who was winning the Demon king was actually a nice person and he wanted to solve everything and he was trying to get rid of the evils within the society so at the end he decided to kill himself so that the society can heal it self and the Demon king let the hero's to kill him. The Demon king said ' many sun's later at the dawn i will reincarnate and i will cleanse this society from evil ' after saying this he asked the heros to kill him . The heros killed the Demon king and the war was ended and the humans emerged as the winning side of this war TO BE CONTINUED ...