Hideyuki Kikuchi's Vampire Hunter D Manga Volume 4

The City, a tiny metropolis of a few hundred sheltered citizens floating
serenely on a seemingly random course a few feet above the ground, has long been
thought safe from the predation of marauding monsters. It seems like a paradise
- a paradise shattered when an invasion of an apparent vampire threatens
the small haven! While the Vampire Hunter known only as "D" struggles to
exterminate the scourge, a former denizen of the city, the attractive Lori
Knight, and the brash John M. Brasselli Pluto VIII seize control of the city,
lurching it onto a new and deadly course. D's travails are just the
beginning...