I haven't seen one, but I haven't searched for one either. These days most of the Korean movies I watch are 19+, I wish their was a thread to talk about them. The lovely dovey melodramas aren't working for me anymore, especially after visiting Korea and seeing that some of the stuff that occurs in the 19+ movies are real life.
Also most don't even have reviews, so I've started typing up my reviews even though I'm not good at reviews, but something is better than nothing.