She was originally the patron saint of heaven and the most powerful magician in this magical world; she was the happy angel of the lower world. She was the patron saint formed by the gathering of all kinds of beautiful things in heaven. She was also an angel. She made everyone happy, but she did not make herself happy. Until one day, she fell in love with him and they were together. However, man is destined not to be with God. The Emperor of Heaven found her and forcibly took her back to Heaven. Eighty-one blows from the Hell Vine broke her meridians! But she, regardless of her injuries and the laws of Heaven, forcibly opened the passage between Heaven and Human World in exchange for her heart! She dug out her heart just to see him. But he found a new love when she was brought back to heaven! And he pretended not to know her! She cried heartbrokenly. On the angel's purest wings, there were wings belonging to the devil. Her originally pure and innocent heart became terrifying and bloodthirsty! At that moment, she became the coexistence of angel and devil! She said: I don't know when my heart stopped beating for you. I don't know when I fell from an angel to a devil! In her crazy revenge, she succeeded and fell in love with someone else, and that person loved her back, even beyond his own life! However, their identities... Have become an obstacle to their love! But he said: Since we are not from the same world, I will become a person who belongs to your world!