honesty cain liking aria isnt even a big deaal in manga like in beaware of the brothers the fl had a good relatioship with her brother who ended up as the ml its super gross but more and more manga keep doing it
Viridescent Crown also has the FL wanting to get together with her step-brother
http://www.mangago.zone/read-manga/recording_hall/?FpBj
i think the problem is more that he saw her as trash before and even executed her. Also... he knew her as a child while he was older. Sexualising her when he knew her as a child and saw her grow up is quite creepy, I mean she's still quite young.
Also actually him liking her being a creepy thing is more common sense than most manga out there lol that would be the normal reaction, manga with step brothers being interested in the sister they grew up with are also creepy, the author and readers just romanticise it.
a lot of ppl are saying' 'oh why was he cold he had loving parents'' and '' he grew up well why was he a jerk'' but i think thats exactly why he was like that elizibeth was perfect and doll like loved by the public for being '' kind and gentle'' and nobles prolly kissed up to her cuz she was known as perfection what every noble wishes to be seen as and leo the emperor who knew her better saw threw all that and knew she was never sincere and found her acts of kindness and her perfection disgusting cuz he saw threw that and only saw an empty doll behind that and him who grew up with loving parents and maids it was gross he hated her cuz he knew what real love was and anyone would get annoyed by somone who was using them she was even if her family programed her to do so (side not im not blaming liz for acting like that at or justifying him being a jerk but all im saying is if u knew ur friend or a kind public figure was doing all those good things to gain ppls favor and shit it would piss u off big time u wouldnt know they where minipulated into doing it all you would see is somone who acts fake to look good) but then he found her story and regreted his actions
i haate how he has no ditermination like if he wanted to be a good guy he should have stolen a bit of her hair and letf without putting her in danger and developing feelings for her dose he not know he has a year left to live but hes wasting it