Deer fell in love with the male protagonist Ryan in his novel. His strong love and faith gave Ryan life and made him really appear in front of Deer. Lane is a demon, so the deer follows "Lane" into a non-human world.
Because of the development of human science and technology, non-human beings are facing the danger of extinction, and non-human beings are united as never before. Therefore, Lu got to know those legendary creatures, the gorgeous and elegant vampires, the cunning and cruel demons, the coquettish and gorgeous monsters, the strong and upright werewolves, the dark and mysterious ghosts...
Along with the battle and various dangers and adventures, Lu discovered that there seemed to be a secret hidden behind "Ryan"...