@Doomer just look at the title and the previous chapter , it is a good old grimdark hentai
At this point , if theses guys have a way to go back take the petrified girls and bring them back to a weird fetichist brothel to use them as fuckdoll it would feel normal compared to the rest of the manga.
Also , may consider dropping it... I mean what's the author thinking , it drop the quality #sarcasm