If you enjoyed Goblin and Tale of the Nine-Tailed, you'd probably love this one too. This one though seems like it is built with more realistic characters and the plot does not solely focus on the supernatural elements existing. This makes it easier for the viewer to relate and get attached to the drama. I don't think that's something I have experienced with other fantasy dramas.

Now, in terms of characters I think it's one of the most charming, out-of-a-book relationship I have come across. You can really feel the strong feelings going on. They both have interesting aspects of personality shown from the very first episodes. You get interested in them, their background and their surroundings. Every trait of them is hinted in every other scene rather than easily served to the viewer.
I'm not quite sure where the second lead roles stand in the plot, but i hope we get to see their part in the story soon.

The scenery, locations and set design in general is really pleasing and the cinematography takes full advantage of it.
Sure its early to judge but there are already some scenes I'd gladly rewatch soon. With that being noted and my expectations set high I genuinely recommend this one.

Hope you enjoy watching!