Left behind (GurenxOC) (DISCONTINUED)

Mizuki, the OC lived a happy life like most kids until one day her parents died. Upon taken by the orphanage she meets Yūichirō , Mikaela, and other orphans. It takes a while for her to get comfortable with the people around her. In 2012, a virus spread in Japan, killing humanity, and vampires took over. When Mizuki saw all the dead bodies, she promised herself to protect her new family even if it will cost her life. Eventually the vampires take Mizuki and the orphans to the vampire city where they live for 4 years being treated like livestock. Until one day, Mikaela stole the map, where it leads the way out of the vampire city. That night Mizuki lost Mikaela and the orphans, only saving Yūichirō. When Mizuki and Yūichirō ran out of the vampire city, they meet Guren Ichinose. What does the future have instore for Mizuki? Start reading to find out.
Disclaimer I do not own Owari no seraph and the pictures unless I edited or drew it.
Also there might be mature content such things like blood.