Monster Stein

A decade or so years ago, humanity was facing defeat in its battle against werewolves, witches, and other supernatural beings. What turned the tide was a human weapon created by Dr. Frankenstein... Time passes, and Vic, a mysterious girl, is traveling with Stein, a large man covered in scars. All for the purpose of laying waste to the warped logic of this world. (Source: Kodansha, translated)