Originally Posted by
Suet Seung
Main Heroines and their Bad Relationships - Another common cliche motif is to not only have the main heroine come from humble and an ordinary family (that's poor), but she has to suffer from a betrayal of long-standing relationship with a boyfriend. If the main heroine is dating or engaged at the start of the drama, most likely she will have a cheating boyfriend or fiance who cheats and sometimes cheat her out of her money and life-savings. It's a plot device to garner the audience's sympathy for going through such things.
Soulmate, My Lovely Sam Soon, Personal Taste and numerous other TV series...I don't have time to list them all out. But if you watched a Korean series, you'll know.