"Vampire Knight: Origins" is a fantasy novel by the author Yanhai Gaoleng Kafei. The story takes place 800 years ago in the medieval era, a time of feudal lords, conflicts between civilization and savagery. A young boy from a tribal wilderness fights to protect his loved ones but is captured by his enemies. In a desperate moment, he makes a pact with a demon, offering the souls of others in exchange for his own survival, thus becoming a servant of darkness. As he faces his loved ones again, the bonds of brotherhood and family have long since shattered, and his fate is leading him into an even deeper abyss of darkness.