As most of you know, the story is about Yukari 'Caroline' Hayasaka (Keiko Kitagawa) who doesn't really sees a meaning in her life. She's a normal high school student who tries really hard to get into a respected university. On the other side, her life gets shaken up when she meets the ParaKiss group and falls in love with George Koizumi (Osamu Mukai). Initially, I got annoyed with Yukari's personality because I do know very well what to do with my life and she seemed very thoughtless. However, I started to get into her skin and realized that there are lots of girls who go through the same situation in real life too.
The choice of actors was very good. I, personally, love Osamu Mukai. I've seen him in Nodame Cantabile, one of my favourite animes, Atashinchi no Danshi, where he was just too cool and, recently, Hungry. I admire this actor a hell lot and, adding to his acting skills, he's just so loveable in his dramas/movies. He gets you addicted to his character and you can't get yourself to hate him. Now, there's also Yusuke Yamamoto, who I sincerely didn't know he plays Hiroyuki Tokumori. In my vision, he wasn't really that good for portraying Tokumori but he did well enough. Nothing surprising, though. As the lead role, Keiko Kitagawa was pretty good. I've seen her in Buzzer Beat as Riko and she was also amazing. Now, in Paradise Kiss she definitely acted different and she improved. She's a good actress and she's really pretty. Now, next to these actors there are Shunji Igarashi (Isabella), Kento Kaku (Arashi) and Aya Omasa (Miwako). I totally love them too. Aya's real personality is closer to Miwako's than Sunako's. However, she seems to glow in both characters but I guess she does play Miwako better.
Overall, I love both anime, manga and movie and the subject has a more subtle message. The actors played very well, the subject hasn't been shortened but there are slight differences. The ending, thank God, is new. They do meet again and they stay together. That's one thing I hate at the original piece. George leaves for France, if I remember correctly, and Yukari marries someone in the anime and manga but it's really nice they meet again in New York in the movie.
You should check the movie out; doesn't matter if you have seen the anime or not, just check the movie out. You'll love Keiko and Osamu.