Blood+ is a fifty-episode anime series produced by Production I.G and Aniplex that originally aired in Japan from October 8, 2005 through September 23, 2006.
It is a two-volume series that premiered in the September 2005 issue of Shōnen Ace and follows Saya and Hagi's experiences during the Russian Revolution.
The third series, Blood+: Kowloon Nights, released in Japan as Blood+ Yakōjōshi (BLOOD+ 夜行城市, Blood+ Nocturnal Castle City), is a single tankōbon series by Hirotaka Kisaragi.
[1][2] Set in Shanghai, it follows Hagi as he searches for Saya and the complications he must deal with.
[1] All three manga adaptations have been licensed for an English language release in North America by Dark Horse Comics.