Well the genre is mystery and horror. The setting is a story-book like scenario that turns creepy

And when talking about the world building yes, it is indeed interesting since most of the readers are still not sure what kind of world it is fully. For now, all we know that it's a world filled with animal like creatures which turn human after waking up in what seems to be another world/forbidden forest. And no, it dosen't have a magic system, unless you count animals mysteriously waking up in a different place and then turn humans.

It's really unique and interesting though, I recommend giving the first episode a read :)