brilly brilly's feed

so ok i like this series and i like the main pairing, i think they have good chemistry
and in the pantheon of step-sibling pairings this might be the Least Bad one i've ever seen?
like, they didn't grow up together, since the ML went off to the academy shortly after the FL started inhabiting this body, and they never regarded each other as siblings
(him bc he didnt trust anyone, and her bc she wasn't from this universe)
he also apparently only became interested in her after the death of the family, when they were already older, and they only started really interacting with each other in their late teens/ early 20s
i also understand that for this specific set up, they would have to be step-relatives of some sort, or the whole succession plot wouldn't happen
THAT ALL BEING SAID
i still feel kinda uncomfortable with the fact the original characters were step-siblings idk
most of the time the story is Fine and it doesn't bother me much, but sometimes they bring up like 'oh yeah he's my little brother' and i'm like hm. don't like that.
it's a sweet webtoon overall and it's not enough to put me off from reading it but idk
as someone who grew up with step-siblings it annoys me how prevalent step-sibling ships are in romances