The Marionette Maker

To lovers are forced to part due to an execution. These two individuals had only been married for six months until Yukuno's execution, and now that she is gone Mikage is forever alone, but not in mind or imagination.
After this tragedy happened he plunged into darkness, eventually becoming a serial killer. Only killing women that resembled his beautiful wife, scraping the fat from their skin, doing everything to preserve them as much as possible, drilling screws to their bones and turning them into puppets.

Extension: he only keeps them in puppet form for six months(the time they were married) before taking the stringed screws off the victims before taxidermying them and setting them in glass cases all around his basement and discarding the bones