[4] It is a disco song characterized by a groovy, synth, bass line, with lyrics revolving around the protagonists finding their own courage to confess their love to a crush.

"[7] "Set Me Free" is a disco track that takes a retro-futuristic approach, characterized by groovy, synth, bass line, "simple yet powerful sound", and liberating lyrics.

[2][6][8] The lyrics revolve around the protagonists finding the courage to confess their love to a crush, with lines such as "I've been hiding how I feel for you forever" and "Now that it's off my chest there's room for you and me".

[10] The music video alternates between two sets, a lonely planet in outer space where they perform the song's choreography and a soundstage designed to look like a small town.

[11] On March 4 and 5, Twice opened "Twice Pop-up Experience" in Los Angeles to communicate and celebrate the release of "Set Me Free" with their fans, where they teased part of the song's choreography.