Just look at a natural and not exaggerated acting, you can get a smooth and reasonable plot. Then, you will enjoy "the river where the moon rises". It can comfort your mind and soul on an annoying and busy day.
I really don’t like some Korean drama plots (for example: the president’s VS female secretary, a series of hospitals, prisons, lawyers, travel through time and space, etc.), especially the naive and almost stupid heroine. Or an actor who deliberately expresses a sense of presence through exaggerated acting or plots.