It's a good show but it has some serious flaws. The production, style, OST and acting were on point.

The good:
- How they connected the dark fairytales with the ongoing events was original and gave the show a darkish fairytale atmosphere.
- The FL was indeed toxic but that's what I liked, Shows with anti-heros lead are my favorite and there's never enough of them, specially the FL, it's always the ML.
- Sang tae was really well written and acted.
- The comedy aspect was well written and made me laugh most of the time.
- The last episode was heart warming and didn't made me feel like I wasted my time.

The bad:
- The ML was too wooden, I don't know how KSH being the star that he is accepted a role meant for a newbie. I say it b/c I didn't know who he was when I watched and I barely noticed him beside his crying scenes nothing really stood out for me.
- The main plot twist and the resolution of the mystery was a hard miss, all over the place and didn't make sense. It's ok for a show to miss some plot here and there but this was the main mystery that was building from the start, they should've at least come up with something logical and try to explain the jarring potholes if nothing else.
- They dropped the gloomy fairytalish atmosphere in the second half for some reason and it became a classic melodrama-romance with comedy here and there.