If you're into the darker, more melodramatic end of the spectrum, look for translations of novels by popular webnovelists on sites like Wuxiaworld. They've branched out from Chinese cultivation stories to include some Korean romance fantasies. Think stories with complex revenge plots, tragic backstories, and intense emotional payoffs.
The prose tends to be more descriptive and the pacing slower, which really lets the angst simmer. It's not everyone's cup of tea, but if you want your romance with a heavy side of drama and suffering-before-joy, this niche has some brilliantly translated works.