Note that the script takes quite a few liberties compared to the Japanese version. Or you could say it’s the opposite, if we consider this version to be the original and the Japanese one to be the translation.
Even if the sizes are a bit wonky at times (because if the Neko girl is truly that big then holy those are BIG buses lmao!), this might easily be one of the best Doujinshis I've seen where a giant girl "plays" with a city and its inhabitants since Kelerst really knows how to draw Unbirth stuff with one or multiple people inside a giantess lol. Ngl I also love how its kinda implied at the end that the other bus and all the persons inside it are still alive & stuck in her vagina or at least the one school girl that manage to get out of it during the act lmfao.