Tatsuya Shiba is a highschool student council president who also secretly guards the vampire students in their school. The school's headmaster is a noble vampire, who is one of the advocates of vampire-humans co-existence. An advocacy that began 200 years ago, there are still purebloods living in the present day that plan to kill all noble vampires and wipe out human race to regain power and authority. Tatsuya then joins Vampiro-Hominum Club, a human association of vampire hunters headed by their headmaster to battle the evil purebloods and to protect the girl he fell in love with who happen to discover about the vampires in school. Will Tatsuya be able to accomplish his mission without losing the one he love?