I am tied to a demon. I have avoided magic with all my might all my life. Now I am in charge of a demon whose magic is stronger than that of the most dangerous magician or wizard. Demons are evil. That's what my textbooks say. This is what I see. He is merciless, hot-tempered, cold. But he always protects me. And I wonder what lies in the heart behind his hostility. My demon is a monster. Heartless or not, my contract with him is illegal and dangerous. Together we must find a way to return him to his world before anyone reveals our secret. If that wasn't enough, I realized something else: My demon isn't the only monster I have to fear.