In the 19th century, a werewolf and a vampire are expelled from Transylvania and flee to Europe. Under the name Holmes and Watson, they try to build a new life in London and open a detective agency. Note: Number of volumes and extra content varies depending on publisher. Currently OOP and e-book is the 5v version. • Halloween Comics: 8 Volumes • Asuka DX: 7 Volumes • Asahi Comic Bunko: 5 Volumes Note 2: Its unclear where the series has been finished or not, fans speculate it was axed due to limitations on violent content in Gekkan Halloween. Note 3: A 2-part casette audio book adaptation exists.