Solving crimes, system, time travel, male and female protagonists
The male protagonist is a modern top crime scene investigation expert or forensic doctor, and he has an almost obsessive research on traces, ballistics, forensic toxicology, etc. While dealing with a strange scene related to "space-time anomaly", he was accidentally involved in the turbulence of time and space and traveled to a parallel world.
The technology, culture, history and national divisions of this world are all highly similar to the male protagonist's original world, but there are differences in some details. The biggest difference is that the incidence of unsolved cases, strange cases, and serial murders in this world is astonishingly high. Although the police have advanced technology, they seem to have some "shortcomings" in their case-solving ideas and logical deductions, resulting in a large backlog of cases.
See how our hero does it!
It's very beautiful and the plot is tense.