< Oh My Girl! >은 1990년대의 향수를 불러 일으키는 뉴잭스윙 장르로 청량한 멜로디에 소년들의 밝은 에너지를 담아낸 곡이다.

Lyrics by CiELO, SUHI(CIELOGROOVE), BILLENNIUMBABY(CIELOGROOVE)
Composed by CiELO, SUHI(CIELOGROOVE), TRIAD(CIELOGROOVE), BILLENNIUMBABY(CIELOGROOVE)
Arranged by TRIAD(CIELOGROOVE)

Piano by TRIAD
Guitar by TRIAD
Bass by TRIAD
Chorus by BILLENNIUMBABY
Vocal Directed by SUHI, BILLENNIUMBABY @CIELOGROOVE
Recording by COUGAR @CIELOGROOVE
Mix & Mastered by COUGAR @CIELOGROOVE