Responses
Right!!! Loyal sibling right there!
That's what siblings do!
I really like how they didn't make it a weird bro-sis relationship and they actually act like what siblings should act towards each other!
Sorry for mentioning, there's just too many Manhua/Manwha that makes weird ass relationship with the mc and their sisters (〜 ̄△ ̄)〜

Jia is actually tight lipped and didn't even say to jinwoo that she knows, she's just waiting for jinwoo to tell it himself
She's actually very reliable, even the 2 dudes in her comoany