I think if I had to pick, Secret Garden, the story of a plucky stuntwoman rescuing her traumatized but caustic ice prince, is probably my favorite romantic kdrama ever. It just works for me on every level (and if a drama exists that will make me cry more than ep 17 of SG did, I don't want to know it).
So imagine my delight when I found this amazing amazing unspoilery MV that is pretty much perfect:
Click to view
I am desperate for a rewatch now. Anyone want to join me?