The plot is all about this woman, Eun Yi (Kim Ha Neul) who works as an editor for a fashion magazine. She's not really the best when it comes to relationships. On the other side, there's In Ho (Jang Keun Suk) who was a promising ballet dancer but because of an accident the woman he danced with went through, he doesn't want to dance with women any more and instead, wants to be a choreographer. It's kind of a weird motive for giving up but I've seen worse. Anyway, In Ho doesn't have a place to live and when he finds one, it's Eun Yi's. Of course there's more to it but you have to watch the movie for the details. From this to that, In Ho becomes Eun Yi's pet. Again, that's a little weird. She sees her old dog in In Ho, Momo, and that's what she calls a grown up man who becomes her pet...Momo.
This plot has a lot of good points. The actors are good and play well. You can see some positive encouragements throughout the story. Life goes on and you should never give up...entirely. And also, love can be found in the strangest places and situations...But making a grown up, very hot and adorable man into Momo is definitely...different. I also know it's after the manga 'Kimi wa Pet' by Yayaoi Ogawa. But overall, it entertains and it's a good movie.
P.S: You might be killed by Keun Suk-ssi's adorableness. I warned you.