There is Similar scenario of a cop obsessed with a serial killer. Also both have psycologists who study serial killers in the main cast. there is a fantasy element to tunnel, while mouse tries a more realistic approach. Tunnel dwelves into the worst and best of the human mind. And Mouse also looks promising. I believe we could expect a lot from the story. With lee seungi s acting talent, no matter which way his character goes, good or bad, I think he can do a good job.
Another drama that I keep on being reminded of while watching this drama. Same as Strong Woman Dobong Soon, the crime concept is almost the same. Serial killer of women that is traced back up to the present times. And yeah, the fantasy element of the ML being the police assigned to solve the crime in a timelined manner. Like, the ML from the past and present is the same.