Hitskin.com
The story centers around two twins, Arago and Ewan, whose parents were
slaughtered by monsters.
Years later, the vengeful Arago crosses paths
with Ewan, who has since become a police officer, just as blood begins
to flow again in the streets of London.
-Read Arago chapter 1 here: http://www.onemanga.com/ARAGO/1/00/
Genre: Action, Mystery, Shounen, Supernatural