According to legend, there was a creature in ancient times, named Ling. It was originally the aura of heaven and earth. It had no spirit and soul, but it condensed into a soul due to human longing. This is a strange creature born of love. The deeper the love, the souls will gather and transform into the shape of the object of longing in the person's heart, and will be attracted to the person's thoughts and take the form of a human. Every time the moon is full, when the crystal moonlight shines on the world, she returns to a transparent and graceful body that emits light blue light, as if she is illusory. One day, she walked up to him, and he was deeply attracted to her at that moment. From then on, he could no longer tolerate the second person in his heart. He was delighted, and so was she. So, the two hugged each other tightly, as if they would never leave each other again in their lifetime.