I am normally quite picky when it comes to main leads chemistry. This drama is worth the watch for the chemistry alone. Other reasons why I like it are:
- The couple communicate and grow on the same journey to add more layers to the story
- HOT, Ethan and Yang Mi are a hot couple, a powerful hot couple
- The visuals: Costumes, settings, etc are beautifully done
- The fight scenes: I love the direction of the fight scenes in this drama, especially scenes with enough skin showing to be hot but not overly sexual
- The way the OTP touch and tease each other

I could go on, but I hope that you give it a chance and try it out yourself.

It's not perfect, but it's a wonderful, memorable experience.