If it wasn't for the explicit statement, I would have thought it came from the track itself. With regard to the storyline - for whatever it's worth - the main character is disenchanted from music due to the rigor with which their obsessive mother abused him over to perfect. To start, it's more of a story of overcoming PTSD to the tune of learning to appreciate music for what it is with a romantic aspect to it (the one who teaches him is a female musician his age). Whether you watch it or not is your call, but of course, I recommend it. :)
Ach, sorry. I know that's an unfair stereotype, that anime will always devolve to unlocking your hidden powers of friendship to kill gods/become the best/catching them all, but after checking a few clips from it on YouTube I was left with a vastly different impression to what you wrote. If it has a reasonably priced OST I'm likely to buy it though.I would have thought it came from the track itself.
it's more of a story of overcoming PTSD to the tune of learning to appreciate music