As an Asian drama (or "soap opera" as a lot of commoners call them) veteran, I've probably watched more dramas in my lifetime than eaten bowls of rice. And yes, that's saying a lot for growing up in a super Asian family.
"Nail Shop Paris" was one of those dramas that kind of suck you in starting from the very beginning, but not to the extent where you question whether watching it has become an addiction or not.
I originally looked into this drama a chance because of Cheondoong (aka my MBLAQ bias). And although I'm not overly fond of KARA (No offense but Gyuri's eyes are kinda...weird. She has something like a second eye fold going on waaaayyy above her crease ^ ^;), I'm super glad I gave this a watch!
* SPOILER ALERT STARTING HERE *