He is the nine-tailed black fox, the demon king of the demon world; she is a little immortal on Kunlun. One is in the human realm, and the other is in the animal realm. If you fall in love, you will break the rules of reincarnation in the six realms. When they first met, she recognized him as an ordinary black fox as a little black dog and named him Coal Ball... He was originally the supreme and unrivaled demon king in the three realms, but she ended up becoming his weakness. How could the fairy world let go of this rare opportunity...