Luke if line, Lucifer, the son of the devil × Gabriel, the god king
The God-King who went on an expedition brought back the newborn son of the Demon King during the battle between gods and demons, and took him with him to raise him, and gradually developed feelings for each other that were not accepted by the God's court.
Double ending, he ending is followed by the modern chapter
Concept: Forbidden love between gods and demons (no)