I really like the empress character because from what I have read in the werewolf child chapter she is a just ruler and the way she does politics is smart. Beside, Kang jun literally ask her to take him, I know it is not justified to forcefully to have slept with him but think about it he has a better treatment than his previous master who literally abuses him 24/7 and gave him a chain like he's some kind of a beast. Furthermore, Kang jun have a room, an attendant to tend to his needs (bringing breakfast to his room), can roam around in/out the palace, go to the royal library to read, the maid/soldier treats him better, he can go to hunting and etc. Unlike other manhwa/manga that I read, the treatment for this slave (Kang Jun) here is humane.
Kang Jun his current circumstances is basically a freeloader + giving nightly service to the empress.
Kang Jun can turn his life for the better if he does it right.