Koonta's "유행가 (Popular Song)" is a raw, introspective track steeped in cynicism and personal struggle. He critiques societal pressures ("Follow the trend"), online negativity ("Murderers overflow online"), and superficiality, dismissing easy answers about "mentality." The lyrics expose deep inner turmoil, referencing dark memories, identifying with the hidden pain behind Yuma Asami's smile, and finding resonance in Berserk's themes of forgiveness. The repeated, almost desperate questioning of "What's your dream?" highlights disillusionment. The ironic title contrasts sharply with the dark, confessional content, suggesting this raw honesty, despite its bleakness, is Koonta's authentic "popular song."