Matchmaking for Psychopaths

The premise is so unique and unsettling—I'm curious whether this idea came from a real case or pure imagination, and how it shaped the story.

The characters' choices made me question what makes someone truly 'bad'—are they born that way or shaped by circumstances?

The tension kept me on edge, but I wonder if the pacing was intentionally designed to ramp up gradually or if it evolved during writing.