The world was almost destroyed by the devil 500 years ago, but it was the magician who was called the "Magic Emperor" by later generations who saved it!
And 500 years later, the girl who is a descendant of the devil embarks on the road to become the devil in order to protect her two younger brothers!
"Magic Emperor? I have no interest in becoming one. All I want to do is protect those two idiot brothers, save the world by the way, and simply be the King of Demons."
Concept: Two-dimensional