I liked the design, it is very well done so as not to attract attention at least on the visual side, then the plot reads interesting. I was struck by the fact that they turned to stone and some of them managed to get out, would it be like something post apocalyptic? 😲
Now I want to know what that green flash was and where it came from, why did it turn them into stone he
I will have it on my list for those long sleepless nights hehe it's a pity that some anime with a good plot are not so recognized but as you say, it is not obligatory that they are, I know a couple of very good ones that very few know them but with this community we can make them known 👌👀
The green flash is quite a mystery, but you'll have to watch the anime to find out. And well, let's say it is post-apocalyptic but in a more natural way, there are no zombies and natural resources abound, so you don't see killing for food.
Note it down and watch it when you can, it's good to pass the time.