I'll upload the last arc later I think is just 3 chapters, the other girl also gets the body of a pig, she isn't flipped up but the rest of the description is accurate, pretty much everyone else seems to end dead, transformed, or enslaved, at least in the vicinity.
The building is a mix of the babel tower.
Edit, here:
Code:
http://katfile.com/31fe93b52qb7.html