Most of the recommendations suggest shows with almost the exact same plot, characters or ideas but i wanna recommend this drama.
Reason?? Because of the way the two main leads are drawn to each other. How they just end up clicking and everything flows so naturally for them with ups and downs.
I dont know they both have a similar vibe for me definitely recommend checking out MARS.

Both are fantasy universes with a divided universe and everyone out to kill one guy who really powerful and a beautiful relationship/friendship between two unlikely people from different walks of life.