주인공 (선재 업고 튀어)

BE'O's "주인공" brings a completely different energy to the *Lovely Runner* OST — looser, hipper, more playful in its self-awareness. The beat has a loping quality, that particular mid-tempo hip-hop rhythm that feels unhurried but deliberate, like someone who knows exactly where they're going and isn't in a rush to get there. BE'O's rap cadence is conversational and warm, the kind of delivery that makes you feel like he's talking specifically to you rather than performing at you. The song's theme — claiming your own narrative, insisting on your own centrality — lands without arrogance because it's delivered with humor and self-awareness. It's the OST's most streetwise entry, bringing an urban contemporary texture to what's otherwise a more conventionally romantic soundtrack. This is confidence music without the ego, the kind you'd put on when you need to remind yourself that you are, in fact, the main character of your own story.