Kuro no Chi (Black Blood)

Tora is a normal, smart high school girl; until she is kidnapped by the Black Blood Cult, a group of insane, evil people with black blood lead by a man named Kane and a girl named Yulia Ingle. There she meets a traumatized blackblood boy name Aruk and befriends him, and the two escape at a high price; Tora had been changed into a blackblood. They find a strange school called Kamoshi Nami Academy, who teach students to fight blackbloods and demons, and to eventually destroy the Black Blood Cult. When Tora decides to stay, she is sure of one thing, her life is about to change forever. . .
(Action, horror, romance, tragedy, death)