Changed Job to Undead Monarch? Wanted by All Mankind at the Beginning

Darkness invades, civilization collapses, and human beings linger behind high walls. In this era where the Holy Light is the only belief, everyone aspires to become a glorious professional during the job transfer ceremony at the age of sixteen and fight to protect the last home of mankind. Gu Yuan is also one of them. He dreams of becoming a hero. However, when the Holy Light descends, what awaits him is not glory and praise, but the whispers of the dead resounding throughout the sky and the highest-level wanted order synchronized around the world! Warn! The only forbidden profession detected - Undead Monarch! ["Human rape" Gu Yuan, the crime cannot be pardoned, and he is hunted all over the world! The former neighbors turned into life-seeking demons, and the Knights of Light drew their swords against each other. From heaven to hell, only in an instant. When the whole world regards him as a cancer that must be eradicated, when an endless wave of pursuit sweeps across. Gu Yuan had no choice. "Since you say I am a natural disaster, then I will show you what a real natural disaster is!" "Since you don't give me a way to survive, then I will fight my way to the throne of God in this mountain of corpses and sea of blood!" One person is a natural disaster of the undead. With a wave of the hand, the army of bones will overwhelm all the dead and the country will rise again on the ruins!