My fave, Autumn's Concerto! But since you're done with it..
How about Oh My Geum Bi?
I'm currently watching it and I must say, it's heartbreaking.

not the main story, but a part of the story ... i think many of long drama 50+ Kdrama have this as a part of the story

Love is drop by Drop - K-drama
Birth Secret - K-drama

can i edit it later? , too lazy to list it