[3] Contributions to the album's production came from Wheesung, Jinu (Hitchhiker), Kenzie and the former Roommate and Nadia member Hwang Hyun.

The title song, "Hoot", was composed by the Danish songwriter-producers Martin Michael Larsson and Lars Halvor Jensen, of Deekay, together with the British songwriter Alex James, with the intention of creating an "exciting up-tempo record for a female artist or group".

[4] "Mistake" is the second track and a R&B ballad with lyrics by Kwon Yuri which is about a girl who can't move on from a relationship with a guy who asked her to "wait" for him but in the end he found another and she blames herself for not trying harder to keep the love between them.

The fourth track "Wake Up" is an electropop song carrying dark synth beat-sounds with medium tempo shuffle rhythm.

[5] The song demo was written and recorded in the UK, with Nina Woodford singing the vocal, and then finished and mixed in Denmark.