A drama that is understandable because the protagonist is IU

What I feel while watching *The Grand Prince and Princess of the 21st Century*, which I started watching because IU was in it after not watching dramas lately.

I understand why they wanted IU for the lead role.

Honestly, looking at the protagonist's own narrative, I don't understand at all why I should root for her, but strangely enough, because it's IU, I end up understanding her.