Sirenas

Is this another poor woman/rich man baseline? Yes.
Are there many unrealistic coincidental occurrences where there are even doppelgangers? Yes.
Are our leads almost perfect in everything they do and unattainably idealist? Yes.
Does the leads looks exactly the same despite a decade in passing of time? Yes.
Is the plot unique to others? Not really.

BUT... the chemistry the cast exhibits mostly overrides all of the above. This was a very fun series that does well with not leaning too heavily into any theme (politics, legal, romance, humor, etc.) in particular, which created a really good balance for any easy watch. It also does a good job with moving the plot forward in a condensed format. There are tearjerker moments early on and the story could have been ended by around episode six.

I also came in thinking this was going lean mostly towards resolving multiple legal cases in Joseon. While it is an importance aspect of the series, it's really just straightforward cases sprinkled in, with a lean toward the overall main culprit.

This type of series has a bit of everything for those with different genre preferences as long as you can get over the initial "not another one of these..." thought process. And as a slight spoiler, it was quite humorous to see the slight role reversal where the man is the graceful dancer (don't think I've ever seen this in any other historical series before) and the woman is more of the brute. Kudos to the cast.