Any shows where the female lead is the obnoxious bratty but cute type? Like the step-sister from cinderella and four knights, or shin do-young from Monster?
They are always either the second lead (who lose in the end) or a lame side character
I don't know if there are many like that but if you are looking for unconventional heroine you may want to try History of a Salaryman, or I can Hear your voice or Witch's Court
