This is a blending of two well-known stories, with The Legend of Sleepy Hollow and the Headless Horseman character appearing in the latter part of the picture.
A Japanese animated movie by the same name, Vampire Hunter D, was inspired by Hideyuki Kikuchi's book of the same name. The tale of Doris Lang, who is picked to be Count Magnus Lee's next bride, is found in Vampire Hunter D.