Despite having to get used to it, I really enjoyed the non-chronological style of storytelling adopted by the movie. After all, our memories are never recalled in chronological order, even though our lives may be lived that way. The story is not laid out neatly for you, but the trajectories of the friendships are clear enough to the viewer by the end of the movie. The ending is given to you right at the start of the movie, and it's certainly not a happy one. But it sets the stage for the viewer to fill in the blanks. The music is bare bones - appropriate for the bleak tone of the film (no pun intended). The colour palette of the movie and scenery also serves to set the mood for the movie. Lee Je Hoon is thrilling as the protagonist, swinging from sincere and heartfelt, to threatening and fearsome. A heartwrenching but rewarding watch.