The first episode is pretty much a setup to justify the MC behavior through the series, which eventually changes as the characters grows and develop facing hardships that place her at risk of going back to square one.
The story is interesting and it never gets stale, it just progresses naturally as it should, when one of the problems/risks gets resolved, it just progresses to another one, there is no downtime and there is no "time wasted" for the story progression.
The protagonist backstory gradually grows more and more as the anime exponentially adds to both the MC backstory and the current "enemy" motives, which means that there is no never a moment when you say "oh look, more of that, great...".
There are definitely depressing that are a bit harder to watch at times, but the anime does reward you with nicer parts creating a good balance, still, it does this without ever getting boring or stale or by wasting time.
The drawing and animations are good, there are some fights scenes and they are well made.
The voice acting is also nice, the MC voice is fantastic.
I didn't really find something I don't enjoy about this anime, but it's definitely not for everyone, if you can't bear watching depressing stuff stay away from it, that's for sure.
