Over-the-top and overly-used plot points in a K-Drama, like “Surprise, you’re siblings!”, or a birth secret, cancer, car accident, evil stepmother, etc.

overly melodramatic stories, heavily laden

a sylistic, tonal, or narrative element in dramas that chooses to play up outrageous storylines to keep viewers hooked despite how ridiculous the stories become (adultery, revenge, rape, birth secrets [..]