Finally!!!! Ive been waiting for monttthhhsss hoping a good hearted (and h*rny) scanlation team to pick this up and translate it into english. I'm done rereading this in other language, now patiently waiting for the update. Thanks for translating this!
And yes this is as the title says, an Immoral manhwa. It has sexual violence, (basically rape).
Don't read if you are not into something like that (well honestly speaking, no one is into rape, it is horrible)
But let me tell you, the art is just... dayummm!
And putting aside the rape in the beginning, there is something behind it (still doesn't make the rape right), but being a concubine, it is the responsibility and privilege to serve the man of the house tho (cmiiw).
And to spoil you a bit, there is not much spiciness anymore aside from that early rape scene, until we get almost to the end. It will be just explaining the story behind (conspiracies!) and how they survive the politics (with their power of animal instinct to procreate!)
Enjoy!