When i started watching this movie i was not expecting something extraordinary. Before i watched the film itself, I've read some bad reviews and saw Free! (anime) so i was ready for the worst (despite actually liking free! i know it's not something that should be made into a movie). To be honest, i was quite surprised because in the end i enjoyed No Breathing.

Story. 5/10
The story is not the strongest point of this film. There are things that are surprisingly vague and the lack of details makes the story forgettable, the friendship between main guys could be a little more explored and the romantic sidestory could be handled better (tbh it wasnt necessary for Seo In-Guks character at all). Also emotional scenes didnt get to me much (but it could be only me).
However, I dont see a reason why it is compared to free!. Swiming, handsome guys, friendship. Yes. ... but well... i still dont get why people say it could be live action of free because imo No Breathing has different atmosphere.
Despite the fact that story is nothing new and the film is 2 hours long i actually was not bored at all. The first hour was fresh and funny and the second part was ok. To sum it up, the story was nothing (i wont probably remember it tomorrow) but i enjoyed it very much.

Cast. 10/10.
Initially, I was drawn to this film because of Lee Jong-Suk. I am dissapointed that his character was not written better but he still is a good actor.
BUT maaaaaaaaaaan I have to admit that Seo In-Guk is a great actor! I havent seen many of his dramas but whenever i see him i just cant help myself and love whatever he does. He simply carried this film on his back. I'm not afraid to say that without him, the film would be much MUCH worse.
As for Yuri... Well, I am always wary when are idols casted in a film/drama but she wasnt bad. Personally, i dont think her story line was good (or important for the film). However, that is not her fault and i think that she handled her role quite well. She actually looked like an ordinary girl which (,for some weird reason,) i appreciate.
Also, I cant help myself, but i feel like I have seen Shin Min-Chul somewhere but after checking his biography he seems fairly new. I hope we will see him more in the future.

Music. 3/10
Whatever Yuris "band" sang, i didnt like it. And the rest of the ost sounded pretty generic so..

Rewatch value. 4,5/10
The film is not worth of rewatching. But some of the scenes were good and if i ever feel like i need more of Seo In-Guk in my life, i might watch first half of the film (because as i've already said, i liked it a lot).

Overall. 7,5/10
I know i give this film higher rating than i should but (and now i will repeate myself again) Seo In-Guk was great and I didnt get bored despite this film lacked in so many ways. (If you are interested, mathematically correct rating based on my individual ratings is 5,5 but i liked this film much more :))

You should watch this film if you:
a) are Seo In-Guk's or Lee Jong-Suk's fan,
b) have spare 2 hours and you want to spend them watching smth easy and non-complicated