Blood Soul

Blood Soul (ブラッドソウル) is a seinen manga series written and illustrated by Naoyuki Fujisawa. It was serialized in Web Comic Gekkin.

Plot
The Van Helsing Church Order is bent on destroying all supernatural creatures, as well as anyone else who gets in their way. However, a certain silver-haired man and red-haired vampire are not waiting for the Church to come to them! During their latest attack on a Van Helsing "cleansing" squad, they inadvertently save the life of a human being.