To clear up the plot. The very first story has a prelude which is the newest chapters with the diamonds. It seems like this is an anthology, and if you go back and reread you'll see how the stories link up.
As for the women offering sex in order to be protected, honestly it seems pretty f*cking feasible, especially considering how quickly the world falls to chaos when martial law is enacted. It has nothing to do with "humans are inharently violent" but more to do with those who's only reason to not be abusive is because it is illegal will let loose; ontop of those who don't care and hide their abuse and then those who don't even to bother to hide it.
TLDR; The stories do wrap up, so.Yes.








I wish I was joking it's just problem shows up in one chapter and is either solved same chapter or the next. Same problems different characters.