Ah you mean the negation, at first it is really confusing. It goes like this: Q: Do you like coffee? [커피 좋아해요?] A: Yes. (I like coffee) [네] Q: You don't like coffee? [커피 안 좋아해요] A: Yes. (I don't like coffee) [네] The questions were answered with both "Yes". The answer will always rely on the question that is being asked. You can also extend your answer by adding; "Yes, I really like drinking coffee / Yes, I don't like coffee ..." ---- Ne and aniyo doesn't necessarily (directly) means yes and no. 네 = agreement, what you said is correct; 아니요 = disagreement , what you said is not correct