[Update: I suppose one of the quintessential modern girls would have been Choi Seung-hui.]
In my post on Sweet Dream, I mentioned the concept of the 'modern girl' of the 1930s and compared it to the concept of the 'doenjang nyeo' of this decade. I found another photo of the modern girl which makes quite clear the issues that the cartoonist had with them:
What I found interesting was this cartoon about the 'modern boy':
It would appear the 'metrosexual' trend in Korea is not a particularly new one, if this cartoon is to be believed.