This drama is WORTH WATCHING! but after setting a very interesting plot and characters it starts showing a lot of flaws as the show continues to struggle to keep the mystery and romance interesting.
The plot got to a point where the characters were comically being the dumbest group of people in any mystery/crime show I've seen. They kept being separated or running on their one, without no one stopping them for absolutely no reason and for multiple times. The FL instead of being smart or knowing how to deal with pressure, from being in law, will do the most hot headed decisions and run it more and more trouble. Even some of the most fundamental mechanics of the abyss stop working or start showing plotholes.
The acting, other and the FL, is mostly lacking(not to a point of it ruining anything) ... but at least the actors were pretty to look at.
They could have explored a bit more the ML feels of being humiliated for 20 years by the FL. It felt like the character was lacking some self respect or realness because of that.
The OST was non existent for me, I don't recall any moment where I felt something by the music.
I felt like at some point I was in a loop and while it was fun I never want to go back!!