Eren Yeager a 150 year old vampire who is part of the Yeager clan is the grandson to Dragula the oldest living vampire alive. The vampires have a peace treaty with the humans in order to bring peace in the world but one vampire clan called The Titans don't agree that humans and vampires should co exists thus a war has broke out between all vampire and humans with the human's strongest soilder Levi Ackerman. When Eren and Levi have an encounter they are forced to wok together to defeat the Titans. But Eren has a secrect he can change in and out of male and female body. Will Eren be able to save his family or will it all be taken from him?