Starting this off by saying that this is my first MDL review and English isn’t my first language! Btw I’m always open to discussions in the comments :-)
I feel the urge to write a review about DYLB because I have a LOT of mixed feelings about this show, but I would still recommend it to anyone that’s looking for a slow-paced drama.

STORY
I absolutely loved this show until like ep. 10! The pacing, settings, dialogues, main characters (!) etc. were really calm and had an overall relaxing vibe. Because of this, I thought of DYLB as a healing show I could watch whenever I was feeling down, but in the last episodes the plot became a HUGE mess: bad things kept happening one after another (pointlessly, in my opinion) and a lot of side characters became awful. Maybe the thing that let me down the most was that the main couple started to have some trust/communication problems as I loved them in the first place because they were always there for each other despite their personal struggles :-( So the positive feelings I got at the beginning of the show just gradually disappeared and I still don’t really get why the writers thought all these conflicts were necessary (my rating would have been a LOT higher if it wasn’t for how messy it got at the end!).
CHARACTERS
The two main characters are EVERYTHING to me, I care about them a lot because they’re so shy and well-mannered and calm! They made me understand that the main characters don’t have to be super loud or crazy or annoying for the show to have a solid plot. Also I thought it was really cool how the dynamics of their respective friend groups actually mirrored the Brahms-Schumann-Clara trio (& eventually shifting the Brahms role when the main couple falls in love). I didn’t even mind all of the love triangles honestly (but it’s a personal preference, I kinda get that people may find them annoying as they were a LOT). About the side characters, I didn’t really like the fact that the only nice people were Cha Young In and her employee :-( give the main characters a break please!!!!
SCREENPLAY
I have too many thoughts on the screenplay honestly. It’s so confusing to me because it’s both the best screenplay ever and the worst at the same time? For example, the dialogues were unmatched! Really touching until the very end. But I don’t get how the same screenwriters could put like twice every episode a scene where the only character who’s not supposed to be there suddenly just shows up, without any explanations or logic behind how and when and why they arrive at the right (or wrong) moment. I'm not a personal fan of this cliché but I guess I’ll have to let it slide as the rest of the show was really good tbh.
MUSIC
To be honest I was kind of disappointed? I didn’t like the OST that much, considering the singers involved and the fact that it’s literally a show about music (lol). On the other hand, I loved the use of classical music and its history in the storytelling (!) and each episode’s titles!