This story is purely fictitious. Any similarities (probably, 99% of them will not be the same...) Are purely coincidental.
When the entire dark world was ruled by the devil, God gave his adult daughter to the devil in order to preserve his status. The devil fell in love with the underage daughter of the God of Death. The only son of the Devil fell in love with his father's sweetheart, the daughter of the God of Death. However, the daughter of the God of Death was heartless and tearless, had no feelings for love, was cold and cruel, and only did her duty well. In order to gain favor for his daughter, God pushed the daughter of Death into the unknown world...
I didn't like the ending that was caused by laziness, so I started serializing it again. Changed since Chapter 17