"Step" an electro house song. The arrangement makes use of heavy instrumentals including beats, bass and the saxophone. "Step" as well as the last track of the album, "Ending Page", were both composed and arranged by the veteran songwriters Fingazz and Glen Choi, members of the music production firm Artisans Music. Both made their entrance in the South Korean music industry with this debut collaboration with f(x). The French entertainer Aria Crescendo, also took participation in the production of the song. The lyrics were penned by lyricist Jo Yun-gyeong.