행복해요? 어떻게임 행복을 확신해요? In the conversation, the girl asks the guy, 'Are you happy?' and 'How do you know?'. I think these are two questions that some people find difficult to answer and others find very simple. There are often many thought-provoking conversations in Korean dramas, and I think they are worth listening to and thinking about. Let's see how the guys answer!