I suspect the title of the work you're looking for is "Service Patches". IIRC There was an initial story revolving around the central character testing the device and procuring his first victim, then there was a sequel where he ended up with four women before they started being killed and cooked. Can't remember the handle of the author (apologies if they happen to read this) but I'm pretty sure it's in the old Gurochan archive that's floating around somewhere.

Hope this helps, good luck!