This movie was amazing. Yes, it had the potential to be a drama because the story line was complex... but I think that the twist would have become extremely disturbing in a drama format. The cast was superb, believable to the last line. The music was spot on and the song for the end credits was slightly haunting, and makes me want to go download it. No matter much I love Korean movies and dramas there is always a moment where I say to myself, here is the cliche that caused the K-Drama Spoof genre on You Tube. It didn't happen this time. I remained enthralled from beginning to end. I know that we are not supposed to post spoilers, but I need to give a warning... keep your tissues and a cold drink handy to soothe your throat. Tears are a given.