
Speculation about the duke being a serial killer might be true since all evidence point towards him such as all victim that have the same feature as Louis and also about the white kill drugs, he might be using it on Louis also 4 months ago during the ball but i’m sure the duke ain’t the one that rape him (the prince might be the one who helped him during that critical time i guess)
The moment Hyesung said that he will never be like his mother (leaving her family behind) to Dojin really shows his self improvement, as we can compare his attitude from the beginning of the story (despised Dojin a lot even treat him like he is not his equal and how he don’t want to accept Byul) until the end (he finally opened up to Dojin saying that Dojin is all he have in is life and how he ran up to Byul showing his motherly love) !! I’m also glad that Dojin’s family accept Hyesung wholeheartedly even protecting him from his rude father ╥﹏╥