Surprisingly, the drama keeps u guessing all throughout the episodes. And there are new twists and turns every episode even though major ones are a bit predictable. There were some filler episodes in the middle but still the plot didn't falter. I loved how the story developed.
Now the characters:
So far every main character is likable. I know some people hated the fl's guts in the beginning for being willing to sell out Ok Jin but honestly I understand her. and Shin Ye Eun plays her role really well. Not her best role by far but still she is likable and does her role justice. But it is the boys who absolutely stole the show. Each of them have different personalities. and Honestly Kang San and Shi yeol dynamic is to die for. I love all their interactions with one another. Kang San's stoic personality but cute little smiles whenever Dan Oh's is near is amazing. Yoo Hwa and Dan Oh's interactions are pretty fun. But seriosuly my man Shi Yeol absolutely shine bright. His comic timing is amazing. and His personality is so cute. He is also one of the most layered and interesting character in this drama. I honestly started watching for him after the little women and I am glad I did. I don;t want to spoil anymore but yes he is amazing and the most interesting out of all. I would go on about him but Idk what to say without spoilers.
The supporting cast did commendable jobs too.

Music didn't stand out a lot.

I wouldn't probably rewatch it. But I might just go there from time to time to watch some of Shi Yeol's scenes.

What I dislike so far:
Some filler episodes
The first few episodes. Like I get that we are introducing the characters and the plot but it was still boring. I almost dropped the drama in the middle.
Later episodes also faltered a bit. Stupid choices.
I hoped that we would be able to get more background for all main characters and how they grew up and how they adapted to their role since childhood. Esp Shi Yeol. This would have made the drama more interesting and the plot would have been better. THis would be better than adding lots of filler scenes.
Last episode. It was rushed. EVen with 18 episodes I can't believe they didn't give a proper thoughtout and sensible ending.
I liked the action pieces for the most part but sometimes they are not good. Only some scenes stand out. For a drama that is esp focused a lot on sword fight scenes and stuff I expected variety. This one is just a minor gripe.

So far, I like the drama. This is one of the few dramas I am watching right now and honestly it is worth watching if you like mystery with light comedy elements.