The story follows johndavis, a student who barely survives a deadly encounter with two vampires who slaughtered his family and destroyed his house. He is taken to the hospital in critical condition. After recovering, johndavis discovers that he underwent a surgery that transformed him into a half-vampire. On his quest for revenge, he encounters a vampire girl red_rose, who then introduced him to a vampire hunter organization known as the Red Shield. The Red Shield then wants him to join them to hunt down the vampire who's responsible for killing his family, Lord Venus.
