"If you do good deeds in the human world for a year, you will be able to regain all your powers."

Aides , a high-ranking demon, was forced to live in the human world as a saint because she lost a battle against his rival, the god Ferdinand. Unlike when she was a demon, Aides' body became frail, and if she didn't perform good deeds, she would collapse easily. She couldn't speak ill of others or attack humans... That's when the emperor Rayden, who looks exactly like the god Ferdinand, appeared before her.

"What a cute saint."

For some reason, the cold-hearted emperor Rayden begins to take an interest in her... Will Aides be able to survive as a saint and return to her original world?!