Yeah I also see that, when they(the girls) realized that they will be wifes for them, it's like, "Oh no, ima be a slave for a demon for the rest of my life now!".
Also if the demons wanted to do something already, they would've done it.
You'd assume a wife isn't a slave, but a wife.
But eh, whatever.
edit: also lowkey not even interested in anything in the human world cuz like ya think you can get back those girls from fucking demons?
pssshhhhhh.