KDrama that is not so happy ending but still became one of your favorite.

Cruel City
Six Flying Dragons
Nine Times Time Travel (still confused lol)

Cruel City
Cheese in the Trap

for my kdrama favorites: cruel city followed by 49 days & then missing noir m 

since I'm also a jdrama fan, I want to add border & 1 litre of tears (not that anyone goes into this expecting a happy end)

Moon Lovers: Scarlet Heart Ryeo  

Doctor Stranger
Iris

Iris

Moon Lovers 
cruel city
Innocent Man

Scarlet Heart Ryeo
I Remember You