**Mika and his family from the orphanage were taken by vampires when a deadly virus spread across Tokyo. One night he had an escape plan.. His best friend was Yuuichiro he was almost more than a brother. But that same night mika and the rest failed and died.. Except for Yuuichiro... **

"Run.. Go"

Yuuichiro ran away. And became a vampire hunter well mika became a vampire... But yuuichiro didn't know this...