[*Intro* – dark ambient synths, filtered trap beat build-up, robotic vocal chop repeating] flash... fever...

[Verse 1 – rap verse with Korean lyrics, trap-style beat, soft pluck synths]
눈을 감아 번쩍이는 light
내 안에 숨어있던 wild
멈출 수 없어, 내 맘은 burn
숨결조차 뜨거워져 turn

[Pre-Chorus – melodic female vocal, layered harmonies, rising tension]
이 순간을 가득 채워
터질 듯한 heartbeat
너와 나, same dream
We about to set it free

[Chorus – full EDM beat with synth chords, melodic vocals]
Flash fever, 번개처럼
내 안에 fire, can't turn it off
Boom boom heart, 뛰고 있어
이 밤에 high, never get enough

Flash fever, 나를 던져
세상을 깨워, turn it up
Drop the beat, don’t stop
We go loud, we go wild

[Drop – modern EDM x trap drop: heavy kick + snare combo, glitchy synth leads, chopped vocal sample] flash... fever...

[Verse 2 – rap verse with fast Korean flow, synth bass groove]
차가운 city, 뜨거운 soul
빛으로 그린 새로운 goal
다 부숴버려 limit line
We crossing over every time

[Pre-Chorus – repeat with more vocal layering and tension build]
이 리듬 속에 날 맡겨
끌림은 이미 deep
Don't blink, just feel
We’re rising up, no sleep

[Chorus – same with added background vocal harmonies and synth layers]
Flash fever, 번개처럼
내 안에 fire, can't turn it off
Boom boom heart, 뛰고 있어
이 밤에 high, never get enough

Flash fever, 나를 던져
세상을 깨워, turn it up
Drop the beat, don’t stop
We go loud, we go wild

[Bridge – ambient breakdown with soft synth pad, slowed beat, whispered vocal FX]
빛 속에 날아가
우린 멈추지 않아
영원을 불태워
이 순간이 전부야

[Final Chorus – full power with layered vocals, gang chant, and extra FX]
Flash fever, 번개처럼
내 안에 fire, can't turn it off
Boom boom heart, 뛰고 있어
이 밤에 high, never get enough

Flash fever, 나를 던져
세상을 깨워, turn it up
Drop the beat, don’t stop
We go loud, we go wild

[Outro – fade-out with soft synths, heartbeat FX, and final vocal chop] flash... fever...