"Don't Know" by Jeong Sewoon is a Korean pop song that reflects on the uncertainty and confusion that can arise in a relationship. The lyrics express the protagonist's desire to understand their partner's feelings and thoughts, wondering where their emotions are leading them. The song describes the protagonist's tendency to overthink and question their own emotions, as well as the struggle of wanting to express themselves but not knowing what to say. The repeated phrase "I don't know" represents the protagonist's confusion and longing for clarity. They contemplate following the wind and going with the flow, uncertain of what each day will bring. Despite trying to pretend that they are okay, thoughts of their partner keep coming back, fueling their curiosity and desire to see into their partner's heart. The lyrics also mention clouds above the protagonist's head growing larger, symbolizing the increasing weight and complexity of their thoughts and emotions. Overall, "Don't Know" expresses the universal theme of uncertainty and the longing for answers in a relationship, capturing the emotional rollercoaster that comes with not fully understanding someone else's feelings.