Ning Ai, a genius magician, was hunted down because she secretly learned "dark magic". Her parents died tragically. She exchanged everything for the help of the demon god from outside the world. The "Demon God of Love" signed an eternal contract with her, using "love" as energy to continuously enhance the power of the demon god. But will the demon god really be the most powerful person? Is the ban on "dark magic" really just for the sake of the future of mankind? What is the truth? What's the future?