Undead Girl Murder Farce, Volume 1 (Undead Girl Murder Farce #1-3)

The end of the 19th century - a vampire's wife is murdered, and the detective known as the "cage user" is called in to solve the crime. But there's more to the detective and the curtained birdcage he carries... after all, when solving a case involving a monster, it might just take one to know one!