See the Authors/Artist credits on the title page. Seeing as Hosokawa is listed as co-author this time around, it's more than likely it's all on them stretching it to a serialization, after the original work.
Except, for the fact, the artist this time isn't Giba-chan. Which, feels a bit of a disappointment as a lot of the allure of the original was very much the art by Giba-chan...
Might be for the best. Based on a webnovel but doesn't seem to have a light novel adaptation, last published chapter of the webnovel (ch. 148) ends abruptly in the middle of a fight(chapter titled 'fierce battle of the fire rain, part 1). Except the next part never came (chapter was published in...
Well, mammals, humans included, might not be that suited for utopia; Atlas Obscura; The Doomed Mouse Utopia. But hey, we got 'Rats of NIMH' out of it, so there's that. :D