k this one's about a girl who suffers from amnesia cause all the horrible stuff that happens the entire species is enslaved by demons and going extinct, they are treated like animals only they are demons forfathers. the clan worships the moons unlike the demons, who build themselves statues so they can be immortal. the story takes place in a slave camp, its not kid friendly in lightest. some important demon wants to make her his wife because of her healing abilities. she's 15 nnext year he gets her if she can't escape.
Makes me think of a synopsis of a story that was on royal road. I haven't read the story I been waiting for chapters to build up but what the OP is asking for this was the first thing that popped in my mind since it also has a female protag. http://www.royalroadl.com/fiction/6752/lament-of-the-fallen
im not sure i think it was on nu but can't say yes. lamnet of fallen isn't it i read that one. damn maybe i'm nuts can't fnd it. ii only do nu or rrl i check probable tags on rrl and ask there. so im left with tl novels.