You won't believe how happy I was to find this masterpiece. I read the webtoon version of this story a few years ago and I didn't know it had a film adaptation of its own until now. (For those who haven't read the webtoon, I highly recommend checking it out, It's absolutely gorgeous.)
This is one of the first webtoon to film adaptations that I found were done incredibly well. Not just because of the talented cast, but the balance and flow it has throughout the movie. It included all the highlights and important details of the webtoon into this two hour film with such success and precision. Although most aren't happy with the ending, I think its very realistic and completed the story. You won't regret watching this film, I assure you.