In a corner of the world, there is a bloodthirsty tribe. It is called the Blood Tribe. The Blood Tribe is also called □ or Fallen Angel. It was demoted to earth by the Emperor of Heaven for unknown reasons. The Blood Tribe is divided into zombies from the East and vampires from the West. Our heroine, Teran Mu, the seventh princess of the Teran Empire of the Blood Tribe, came to the world because she loves to play.