Mars red 2

Mars red 2 – When a series of grisly murders occurs in Tokyo’s red-light district, it hardly makes the news. The vampire soldiers of Special Forces Unit 16, however, believe that a vamp may be responsible. Suwa is usually the most reserved member of the team, but after he befriends a young girl working in a brothel, the search for the killer becomes personal. Will he find the monster before it strikes again?

An awesome historical vampire manga.