I admit that this drama is not for everyone. You won't find bubbly and funny characters. However, as a classical music enthusiast, I want to thank the writer & director for putting this magical atmosphere into the drama and for being 'bold' enough to put two introverted characters as main leads. a legit 9/10.

This drama tries to solve the "Doing what you love VS doing what you're good at" dilemma
I can identify myself with the FL, being an amateur violinist myself (I started older than usual) I can assure you that at some point I couldn't continue learning it. It was physically (fingers stretching, having neck pain...) and emotionally consuming ( getting the right feeling, putting emotions in your playing ..). Don't get me wrong it's not like impossible to play it but if you're willing to become a professional it won't be that easy. You feel like you're not enough even if you're a genius in an other field or you're your university's valedictorian or whatsoever (in her case : having a business degree). That feeling of not being good enough at something you really love is torturing. So I can get the main lead. The drama wanted to give an alternative for those who really want to do something that is likely impossible so I kinda liked the resolution of the story.

SPOILER (final ep)****
In her case, as far as I remember, the main lead continued as a musical events organizer so yeah she'll be using her business degree somehow, plus she'll be having fun since it revolves around a subject she's into.
Which was a very realistic but 'not so romantic' conclusion. I also like the coping mechanism of the FL. The fact that she could finally sell her precious violin is so meaningful.