Because the original owner of that body was an idiot and idolized and chased after her own brother romantically.
I don't think they're blood related. I think her dad married his mom. They're step-siblings NOT half-siblings.
(But I'm not entirely sure. Its been a while).
Because they arent actually siblings, ´her father married Ling's mother,he's a faous idol and she a diehard fan.
Ahhh that explains it
Doesn’t the uncle guy know that Ling guy is her brother why does he keep getting jealous??