Earth had turned into hell. It was a battlefield for the angels and demons, and it caused humans to suffer. Lucifer hated humans so much that he wouldn’t even go to Earth to fight in the war. But he wanted to see the state Earth was in. He had heard how much the humans were suffering, and it would give him satisfaction to see it. When Lucifer came to Earth, he was expecting the humans to be acting like animals, violent and crazed. But he saw a lone human boy, wounded and scared, yet sane.