The Demon Goddess is My Maid

In this chapter, we learn that the demon is the goddess of love, and that the spirit heart is the heart of a hero. In other words, the demon's presence is gone, and the hero's heart is gone too. The story of the hero and the demon goes something like this: In the past, the Celestials and the Demons fought an eternal war, but one day a hero was born, and he suppressed the conflict by himself. He signed a treaty with both of them