You have to be 19 (internationally) to be able to drink in Korea. She might have been 20 in Korean age in the novel.
Still that's the year she became an adult, so barely one, very poor and gullible. Black hair dude even admitted a few times how much he liked the fact that she was so much younger than him, inexperienced and easy to manipulate so that he can force her into what he likes (literally grooming). That's gross and with the later r*pe scene that's definitely a show of his morals and humanity

Read a few chapters and was reminded me of Epstein again and again. Please tell me if this is not the case, though I don’t have any patience for giving these men any chance. Dropping till then ://
Also wtf is 18? It’s a number it means nothing. Anyone who is 18 years old is still a child, and I don’t care what this legal age means. Having sex with an 18yo is disgusting.