My Demonic Empire System

Alan Yokob is a Hitman. Dead by car explode Alan who thinks he is dead looks around. Am I in the afterlife? "Welcome to our world" "Where am I? Who are you?" "You can call us Guardians of this world. You have come to another world. You were brought into this world to maintain balance." "Balance?" "A thousand years ago the people of this world defeated the demons. Since then the fate of this world began to change. But now the balance of this world is losing. So we brought you here to keep the balance of this world. We offer you to become the Demon King." Huh! But it's not easy