The track is often cited as a showcase for JUSTHIS's "breathless" rapping style, where he maintains high speed and complex rhyme schemes without losing clarity.

At its core, "SUN GOES DOWN" is a narrative of relentless pursuit. The title itself suggests a transition—the end of a day or a cycle—but the lyrics and performance suggest that the "setting sun" is not a signal to rest, but a backdrop for continued struggle.

The recurring sentiment "I'm not there yet" (내가 때까지 아니야 아직) reflects a mindset of continuous growth and refusal to settle.

The collaboration with , a producer known for his work with BLACKPINK and other YG Entertainment artists, brings a cinematic and aggressive edge to the track.

It remains one of the most memorable performances from the season, often highlighted for its explosive stage presence and the seamless synergy between the rapper's aggression and the producer's polished EDM-trap sound.