Tales of a lonely op girl and an evil op demon

Elsa has two of the heaven defying treasures and Lewis has one of the heaven defying treasures. Thanks to that both of them become extreamely overpowered. Lewis is a demon and he wants all the heavenly treasures. He is greedy, evil and shameless. Elsa is constantly bored and lonely. She also has a mood disorder. What will happen when they eventually cross paths? This is a world of magic. The magic of this world is simple. But there are higher realms of planets and many ways to gain power beside magic.