
They didn’t adopt FL, she a ward.
She isn’t their sibling nor the brothers see her as a sister.
And if you read the start of the manhwa it’s like pretty much said that nobles takes wards with magical abilities to their household to teach them about magic AND eventually marry their children.
So the older brother being the ML isn’t much of a surprise after seeing that.

THIS! This is the only reason I keep reading cuz istg I really hate the pseudo-incest trope! There's a couple ones where mc is "brought in/adopted" clearly and specifically as future in-law... and that's fortunately very different than adopted/brought in as family member and ending up with a supposedly sibling.

Yeah, also; if people growing up together would be considered “pseudo insect” childhood friends to lovers as a troupe won’t be so popular as it now.
Honestly it’s shown really explicitly in the first 5 chapters that she isn’t adopted, it’s stated that she a ward.
Makes me really wander where people reading comprehension go…

Nah... I honestly think it's more trauma than lack of reading comprehension (not that there isn't one in general tho). From every rofan that involves siblings and adoption... majority ends up in fauxcest (pseudo-incest). Whenever it have brother or sister in the title I need to chack comment section for spoilers on who ML is.
Honestly I just want wholesome siblings relationships and no romance between kids...
That Duke of Euros sure is hot. He be mah type of fictional man
AND WHAT DO Y'ALL MEAN THAT THE OLDER BROTHER IS THE MALE LEAD!? WHAT THE FUHHH!?!?