[Underwater]는 혁기의 시작점이 되는 싱글 앨범이다. Lauv, Lany 등 팝 아티스트들에게 영향을 받은 혁기의 음악성은 블루키뮤직의 작곡팀 Wohnen & Garten을 만나 혁기만의 색깔을 살렸다. [Credits] 01. Hold me like the ocean Lyrics by Wohnen & Garten Composed by Wohnen & Garten Arranged by Wohnen & Garten E.guitar by 전효철 Mixed by Bluekeymusic @ Bluekeystudio Mastered by Bluekeymusic @ Bluekeystudio 02. Underwater Lyrics by Wohnen & Garten Composed by Wohnen & Garten Arranged by Wohnen & Garten Mixed by Bluekeymusic @ Bluekeystudio Mastered by Bluekeymusic @ Bluekeystudio Produced by Bluekeymusic Album photo by 박희웅