"Second" is a song recorded by South Korean singer Hyoyeon featuring Bibi.

Initially a standalone single, the song was later included on Hyoyeon's first extended play, Deep, released on May 16, 2022.

On August 3, 2021, it was announced that Hyoyeon will be releasing a digital single titled "Second" featuring Bibi.

[3] "Second" is composed by Bibi, Jeong Ha-ri (153Joombas), Melanie Fontana, Gino Barletta, Britten Newbill, and Michel "Lindgren" Schulz.

[4] Musically, the song is described as a summer dance pop song with "light rhythm" and characterized by "electric piano, horn, cowbell, and heavy bass" with lyrics about telling the listener that "it is okay to give themselves time to breathe in their busy life".