The order of the live actions is as follows:
- 1st came Itazura na Kiss, the Japanese dorama adapted from the manga. I have tried this in the past but never got beyond half an episode because it's frankly badly acted and badly directed. As far as I know, it's pretty rushed too.
- Then came the Taiwanese version (It started with a Kiss), which is considered by the lovers of this story the best in terms of chemistry and general plot flow.
- The last version is the Korean one (Playful Kiss). I watched this one and I'm still asking myself why I bothered. I should have known better, since I don't like dramas where the heroine is a one-celled organism and the "hero" a marble jerk. Furthermore, this one is very rushed too, to the point some parts are simply incomprehensible, since they often jump from one day to 6 months after in the space of 5 minutes.
But if you can cope with this kind of plot, I'm ready to recommend the Taiwan version first. I have seen bits and pieces of it and, although not my favourite by far, it's a decent drama in terms of consistency and romance.
:)