The third season of the Vampire Knight manga mainly talked about Vampire Hunter D and Shu and others who continued to track down Vampire Hunter D's past and found that he had a relationship with Vampire Queen Black Feather. Black Feather used Vampire Hunter D's "Vampire Hunter Sword" to save himself, causing him to become a vampire. In addition, they also found that Vampire Hunter D had once reunited with another vampire in order to protect humans. However, after the reunion, a series of events occurred. In the end, Pivot and the others decided to join forces to stop the vampire hunter D and the other vampires from attacking and protect humans from the threat of vampires.