This movie is great and Yoo Ah In is simply BRILLIANT. If you've seen him in anything else, you will surely be impressed at how completely different he is in this - and that's without some of the most common aids such as different hairstyle, facial hair, different clothes. He looks normal, but like someone else entirely.

The lead character, played by Yoo Ah In, is an introvert. He isn't seen interacting on a close level with anyone in the movie besides the lead girl, for which he develops feelings for after only a couple of encounters.

What I found specially interesting about this movie was that there aren't many lines in it. The characters don't need to say a lot, and you still understand how they are feeling because the storytelling is so intelligent. It is also paced in a way that doesn't get boring.