The song "I Miss That Time" by Im Se Jun (임세준) expresses longing and nostalgia for a past love. The lyrics describe the feeling of missing someone who was once loved deeply, but is no longer by the singer's side. The song reflects on the happiness and pain experienced during the relationship, and the emptiness felt after it has ended. The singer reminisces about moments shared with their past love, and the sense of loss and longing that lingers after they are gone. The lyrics also ponder the possibility of seeing the ex-love again in the future, and whether the feelings of longing and heartache will ever fade. Overall, "I Miss That Time" captures the bittersweet emotions of love and heartbreak, and the lingering memories and longing for a past love. The song's heartfelt lyrics and emotional melody resonate with anyone who has experienced the pain of missing someone they once loved.