Up was released in 2022 as the title track of Kep1er's second mini album Doublast, following the group's formation on the survival show Girls Planet 999 and their debut earlier that year. The song's summery house pop style and point choreography helped it spread through dance challenges, fan edits and short form video. Short chorus clips are shared on soundboards for quick recognition, allowing fans to add a familiar K-pop hook to edits without using the full track, which keeps the sound popular for light, energetic content online today.