"First published in Japan in 2006 by Kadokawa Shoten ..., Tokyo"--Vol. 1, t.p. verso.
v. 1. First kiss
v. 2. Chevalier
v. 3. Boy meets girl
v. 4. Nankurunaisa.
Blood+ by Ryō Ikehata. ISBN 9781593079338. Published by Dark Horse Books in 2008. Publication and catalogue information, links to buy online and reader comments.