Finding gems like this is what I enjoy the most. I throughly enjoyed the music. The only reason I found this anime was because someone used the track "The First Layer" in a completely unrelated post on Instagram. I then Shazamed the snippet and downloaded the track, which lead me to YouTube "Made in Abyss" OST. After a few more tracks I decided to look up the anime and what it was about.
This is by no means an anime for those of weak fortitude. The story revolves around 2 main characters Riko and Reg (which you can read in other reviews) and their journey to the bottom of a massive and abysmal like pit. On the way, they are tested with grueling and gut wrenching challenges that question their sanity to a point...
Overall (it's late and I'm tired so I'm cutting it short) it's an exceptional anime that is a bit outside the norm with gruesome scenes and a story that leaves one with a sense of dread throughout (throughly throughout) the entire series.
The music is spot on (it's the reason I watched it) and appropriate.
I'll finish this another time, too tired.