Responses

"Kisaeng were women from outcast or slave families who were trained to be courtesans, providing artistic entertainment and conversation to men of upper class." (...) "kisaeng were the government's legal entertainers, required to perform various functions for the state" (...) "Throughout the Goryeo and Joseon periods, kisaeng held the status of cheonmin, the lowest in society." source: https://en.wikipedia.org/wiki/Kisaeng
also, I'm not sure if they're actual brother or not lol
So is the noona Nakyum’s biological sister or just a terminology? She’s rich enough to have guards yet I was under the impression Nakyum was from a poor family
This is probably my lack of understanding of history if someone can enlighten me