Matrimonial Chaos? It's a remake of a Japanese drama called Saikou no Rikon. It's more about what makes relationships work or doesn't than strictly about romance, though.
And as far as I remember (it's a bit hazy since it's been a while since I watched it), Padam Padam also doesn't have love triangle or back and forth between a couple, but it's a pretty straightforward romance with elements of fantasy.
It seems like our taste are quite different but I try my best:
Scent Of A Woman - a shy woman get to know that she has cancer and decide to live her last days to the fullest and finds real love just because she allows herself to be as she really is (sad and heartwarming at the same time)
Tomorrow With You - a guy is able to travel through time and get to know that he should protect a certain woman in order to save his own life (a rather bumpy romance between two persons who did not fall in love at the first sign)
Hymn of Death - During the Japanese Occupation a man and a woman decide to die together (it is about how they met and what lead them to the decision to die together)
A Gentleman's Dignity - 4 flower boys grown up and fall in love. All relationships are unusual for the Korean society. (my all time favorite romance drama)