Hellsing (ヘルシング Herushingu) is a Japanese manga series written and illustrated by Kouta Hirano. It chronicles the efforts of the mysterious and secret Hellsing Organization, as it combats vampires, ghouls, and other supernatural foes who threaten England. An original video animation (OVA) entitled Hellsing Ultimate was produced by Geneon. It followed the manga storyline more closely than the anime series. The series spanned 10 episodes, released in Japan between February 10, 2006 and December 26, 2012. In North America the series ran from December 5, 2006 to October 28, 2014.