An angel without wings and a one-winged demon fall into the human world in search of a way to restore their wings. Who would have thought they'd fall in love over time? They fall for each other, but the demon's father interferes, forcing them into a love-hate struggle. The angel ventures into Hell alone for the demon, only to find that the demon has already been turned into a killing machine. He tries to awaken the demon's memories of him, but instead awakens memories of their past lives: one was the God of Creation, the other a Knight of Judgment. Meanwhile, the demon's father has been corrupted by the Spirit of Chaos and plans to remake the world. Can they stop him? [A new author's practice work. Sorry if the writing isn't very good, and thanks for understanding.]