On August 1, 2024, an alternate version with the addition of the EP's second single "Sweet Dreams" was released to commemorate the group's 10th anniversary.

On June 10, 2024, SM Entertainment announced that Red Velvet would be releasing their seventh Korean extended play titled Cosmic.

The lead single, "Cosmic", was described as a dance-pop song characterized by "synth strings and disco rhythm" with "fairytale-like" lyrics about "about meeting [the listener], a lonely traveler who crash-landed on [Red Velvet] and learning about infinite love like the universe".

[10] The fourth track, "Love Arcade", was described as a "medium-tempo" dance-pop song featuring "fun sound effects reminiscent of an arcade and keyboard sounds" with lyrics about "a witty story about letting go and creating our own world as our hearts guide us, including breaking all the rules that stand in the way between you and me".

[11] The fifth track, "Bubble", was described as a synth-pop and dance song featuring "drum beat, bass, and keyboard performance" with lyrics about "the world is so dazzling around you that the entire universe will envy you wherever you are".