I think the Korean romantic dramas with high scores are as follows:

First, "Blue Life and Death Love"

It laid the tragic tone of the whole drama, which can be said to be the masterpiece of early Korean drama.

Second, Pinocchio

Tell the love story of youth growth between a man living under an alias and a woman who can't lie.

Third, "love forced landing"

It tells a particularly romantic love story between Yin Shili and Li Zhenghe, the heiresses of Korean chaebol.