A struggling magician on the verge of flunking out of the magic academy makes a life-changing contract with a beautiful and powerful familiar, making every day exciting in this traditional fantasy manga. Alto, an aspiring magician, is on the verge of repeating a grade when he stumbles upon a mysterious book containing a demon powerful enough to bring about the end of the world—the alluring Vermeil. But Vermeil's demonic powers are nothing compared to her naughty and mischievous antics! Action, drama, and magical challenges await them, and it all begins with their fateful encounter.