I hardly ever write reviews about anything I watch but this movie version of this show I had to.

The actors are amazing. This made the series good by itself, but the added scenes in the movie make the difference! The first half of the movie doesn't really add anything to what we saw in the series. Lee Sang (Sang Yi) makes me believe that he has fallen in love at first sight. The extended scenes were nice, but didn't make or break it against the series. The second half, the additional scenes make the movie so much better than the series. Kang In Soo's friendly demeanor doesn't let us truly understand his feelings for Sang Yi in the first half. The added scene in the second half allows you to see his questioning of his true feelings, something that was completely missing in the series. It made the whole movie for me.