Firstly, if you're completely opposed to the idea of dark/black comedy, I'd refrain from watching this film, as it does involve desecrating a corpse in a comedic fashion in multiple scenes. There's a bit of cursing, but aside from that nothing's too visually graphic.

Room No 7 doesn't have much to showcase in its plot, with a general storyline of characters just struggling to pay off debts. It has a relatively slow start, but gradually builds up tension as the film progresses. We aren't given too much background info on any character aside from short reflections, and the film focuses more on the present situations than anything else. The storyline isn't particularly deep in any way, and is for the most part just a fun watch with all the comedic elements it contains.

While the plot was relatively lacking, the acting cast did a great job. Shin Ha Kyun played the role of a desperate DVD bang business owner flawlessly. Although I personally was not fond of his character and personality, watching him was genuinely funny and a joy throughout the entire film. Do Kyung Soo also nailed his role of a university student in debt. While the character was nothing too unique, the expressions he made alongside Shin Ha Kyun were executed excellently. The duo made what would have been a rather dull movie into something that was genuinely funny.

There wasn't much music playing in the background for the majority of the movie, only in scenes with a bit of suspense and scenes that involved a bit of action. Nothing too memorable, but the music synced well with the scenes and never felt too unnatural.

Overall, aside from the comedy, the film is portrayed in a relatively tame, ordinary fashion, in which contributes to what seems to me, a rather a unsatisfying resolution. It was an enjoyable watch, but nothing considerably moving or groundbreaking. Give it a try if you enjoy the actors or are in for some taboo humor.