[serenade_beta]

Spoiler for final thoughts:

Ahh yes, we get no follow-up on the rape scene or Robin's motive

While the anime did keep me interested throughout the episodes, this was mainly because they threw all the audience into this mysterious world and there were hints here and there on what is going on. The switching between the past and present was fine.

But since this is an unfinished manga, the anime was equally unfinished. The only thing we really learned was that the kids in the past turned into monsters except the few that escaped.
And that's it, really. This follows with a big problem that the two big "baddies" in the anime, the old lady and Robin, just come off as some crazy people that are... crazy and mean for the sake of it.

So 8/10. I think it was a pretty solid anime, but it left me feeling that nothing was solved and maybe I watched an entire cour just for a rape scene that never really led to anything.