Megicula, a devil of the underworld, has entered the human world, but with great risk. She was left behind by Lucifero and Adrammelech, who were aiming to invade and destroy the humans. After their battle, she meets a human commoner who can't use any magic named Asta. How will things go between them?

Representatives of two separate races met quite by accident. One wanted to use the other for his own benefit. She did not know, however, that this would be her loss or salvation.

Representatives of two separate races met quite by accident. One wanted to use the other for his own benefit. She did not know, however, that this would be her loss or salvation.