It’s difficult to judge this one. Overall this is a good watch. 3D may not be the best ever, but it’s still quite good, pacing is great, monsters are interesting. But it could have been better if authors paid more attention to the details of the world they were building.
From the very beginning something felt off about this anime to me. I thought initially that it was just somewhat awkward human interactions, with Kento being the main point in those (obviously). I thought maybe he is on autistic spectrum, and that’s the reason. And it is that, but not only that.
There are lots of minor things that do not make sense in the world itself, and in the way that people perceive this world and …

My Daemon
To save his mother, a kind-hearted boy and his tiny daemon friend set out on a journey across post-apocalyptic Japan as dark forces close in.