So in Korean it’s oppa, can be used for older male that isn’t related to you and yes, can be romantic. As for her getting adopted, it’s more because of her talent than anything. She’s treated well because of her talent, but that doesn’t mean she’s treated like family. Pretty sure everyone knows who her real family is (another high ranking family that focuses on magic, not sword)
I actually don't understand why people are displeased with ML and master not being the same person, regardless of that it's clear that Master thought they would both suit each other. He gave her the deed. He's the one who thought she and Yuri stand a chance!
Is it for sure, who master is?