
as long as theyre not blood related, a lot of manhwas will feature romantic step-sibling plots... take "the precious sister of the villanous grand duke." jainer being written to be ADOPTED too can spark some questionable flags (im almost positive its just to highlight the difference between his stance in the duke's family, as an adoptive (no blood relation) child of the duke, who yearns or has lived for his fathers position, whereas camilla, despite being the blood-related, first born to the duke, refuses her position in favor of her mother and stepdads family); either way, many people can see this and conjure evil ideas about a step-sibling daters plot (ITS STILL INCEST PEOPLE!! if authors REALLY wanted them to be lovers without the weird implications, they could have written them as childhood friends instead of siblings!!! and if it was over inheritance, it COULD HAVE BEEN IN A BUSINESS OR OTHER COMPETITIVE POSITIONS OUTSIDE OF FAMILY!!!!!!)

thats what im saying, in parenthesis i mentioned i dont think jainer is written to be a love interest (rather i think hes being used as a plot device to emphasize the difference between him and camilla, both as "adopted" children in ducal families, except camilla was already born from the same duke jainer was adopted from, yet prefers her step-dad) unfortunately, we both do not speak for the rest of the readers who DO ship or want jainer with camilla.
I hope she not got shipped to her step siblings.