I've watched the japanese drama with same plot, BUT, this movie is far better in any way! The movie is super adorable, and I wouldn't mind having Jang Geun Seok as a pet, he's suuuuuuuuuuupercute. I know, he's a really good actor but he mostly get's roles that are manly and cool. But seeing him acting cute was on a whole other level. Made me fell in love with him again and realize that he's just too good to be true! *o* You really won't be disappointed by any of the actors, they play their roles really good. Unlike the drama version, I really couldn't stand the guy playing momo. o.o The mean girl made you hate her, the sweet momo made you fall in love with him, the ex made you laugh (because he just doesn't have any luck! XD). The cast is really good! The other thing I liked about this is that they made it a movie instead of a drama. The story could proceed in a normal pace without letting the audience get bored. It's a perfect runtime for the plot! The thing I didn't like as much was the music. Sure, it wasn't bad, it's Jang Geun Seok who's singing after all.. But I got a bit confused at the musical. (Can't say more, you'll see for your self if you decide to watch it!) (WITCH I REALLY THINK YOU SHOULD!) Personally, I found a new favourite! :D So I really recommend you to watch this if you like comedy (and some romance)