Looking at what you are watching and enjoying, I think that you will love:
- Moon Lovers: Scarlet Heart Ryero ( I think it does have one of the least draggy plots I've seen)
- + 1 for Healer (same here)
- Love in the Moonlight
- Go Back Couple
- Just Between Lovers
- Another Miss Oh
if you end up enjoying Kill Me, Heal Me (one of my favorite shows of all time), I think you might also like:
- It's Okay, that's Love
- Are You Human, too?