I don't know if I can even write a proper review right now. I spent a lot of the movie sobbing (note: but I also cry easily) so if you're looking for a light movie, this is not it. I describe why I rated certain categories the way I did in the next 2 paragraphs, but if you want to read me gushing over this movie, skip to the last paragraph.

In terms of the acting: I don't know anything about acting, but considering how much of a mess I am right now, I'd say the cast did an incredible job. The main characters were absolutely charming, and I couldn't help but sympathize with them and fall into their storylines. I also never felt like anything was cringy, overacted, or underacted, which I sometimes feel with korean movies.

I watched the movie without english subs, and I'm not fluent in korean, so I took a point off for plot just because I can't be a proper judge of it. But don't get me wrong: what I did understand was excellent. The storyline was cohesive and immersive, I didn't find any gaping plot holes, and I thought everything worked together beautifully. The music tied in seamlessly with the movie, so I can't say if it was particularly good or bad, but there was one song that a character sung that, if you know the lyrics, fits perfectly in the scene. The only reason the rewatch value is low is because I don't know how I'd be able to compose myself enough to watch this movie again.

tldr: I HIGHLY recommend you watch this movie. Highly, highly, highly. It was beautifully shot, beautifully acted, and beautifully composed. I don't know how to properly express my love for this movie without giving spoilers, but I really, really hope that you watch this.