Composed and produced by Geek Boy AI Swettenham, Kyler Niko, and Paulina "Pau" Cerrilla with lyrics written by Kim Bo-eun from JamFactory, the R&B track was released by SM Entertainment on May 8, 2023 along with the EP.
[5] "Thirsty" was written by Kim Bo-eun from JamFactory, composed and arranged by Geek Boy AI Swettenham, with Kyler Niko and Paulina "Pau" Cerilla contributing to the composition.
[8] Sharifa Charles from Clash notes that the song's sound evokes a familiar contemporary R&B style, with "flirtatious lyrics and harmonious melodies", blending 90s R&B nostalgia with modern pop influences through captivating synths.
[9] Abigail Firth from Dork describes the song as refreshing, combining a bubbly beat and flawless vocal harmonies, creating a sound that merges elements of PC Music with the new-R&B style of artists like Flo.
[10] According to Rhian Daly of NME, the track opens with a rippling melody reminiscent of Ariana Grande’s "Thank U, Next," but described that the group delved into a theme of flirtation, delivering a soft feel that encapsulates the excitement of a new crush.
[19] Mary Siroky of Consequence included the song in Fan Chant: 10 Best K-Pop B-Sides of 2023 (So Far) list, mentioning that it offered the group "a great chance to show off their harmonies.