[ Instrumental Intro 5-second]
[Harmonica leads warmly with a nostalgic melody, acoustic guitar gently supports with soft strumming. The atmosphere feels like sunlight filtering through spring trees.]

[Verse 1]
[Harmonica echoes in the background with soft accents, guitar arpeggiates each chord slowly]
햇살 아래 너를 처음 본 그날
내 마음이 먼저 봄을 느꼈어
아무렇지 않은 척
웃었지만
가슴은 계속 너를 부르더라

[HOOK 1 – Repetitive Chorus Starts]
[Harmonica joins the vocals in call & response style, gently mirroring the hook melody]
나 어떡해, 나 어떡해
너만 보면 자꾸 말이 막혀
나 어떡해, 나 어떡해
이런 마음 처음이야
(Just you, just you — that’s all I need)
[Harmonica reinforces final line softly]

[Verse 2]
[Guitar rhythm picks up slightly, harmonica hums faintly in the back]
너랑 걷던 그 길, 다시 혼자 걸어도
네 그림자가 따라와
나 모르게 입꼬리 올라가
이런 게… 사랑이 맞을까?

[HOOK 2 – Repeated with more emotion]
[Harmonica carries the hook line melody with more clarity, guitar adds layered strumming]
나 어떡해, 나 어떡해
꿈에까지 너만 와
나 어떡해, 나 어떡해
말 못 해도 티 났나 봐
(너도 나… 좀 알았을까?)
[Harmonica softly climbs at the end of the line]

[Bridge – Emotional Peak]
[Both harmonica and guitar pause at first, leaving space for vocals. Then slowly re-enter with crescendo]
숨겨왔던 말,
지금 꺼내도 될까?
나 너 좋아해…
사실 매일 말하고 싶었어

[Guitar reenters with fuller chords, harmonica swells into a tender response]

[HOOK 3 – Final Hook with Full Emotion]
[Full interplay between harmonica and vocals. Guitar plays in flowing arpeggios]
나 어떡해, 나 어떡해 (왜 이리 떨릴까)
나 어떡해, 나 어떡해 (말해도 될까)
나 어떡해, 나 어떡해 (이제는 너에게)
내 맘을 전할게, 진심이야

[Harmonica plays the full chorus melody alongside the final line, completing the musical arc]

[Instrumental Outro 3-second ]
[Harmonica gently trails off into the breeze, acoustic guitar closes with a light, circular arpeggio pattern — like a breath fading into spring air.]