"Naughty" was produced by Ludvig Evers and Jonatan Gusmark under the name of Moonshine, Louise Frick Sveen, and Charite Viken during a songwriting camp in Trondheim, Norway.

In an interview done with YouTube channel ReacttotheK, Moonshine revealed that SM Entertainment was at the actual camp and was interested in the song.

[6] Musically, Lee Da-kyum of Star Today described "Naughty" as a future house-style pop dance song.

[7] Kim Soo-hyun of Sports Chosun noted "Naughty" for its bouncy beats, groovy bass lines, and addictive hooks.

Kim Do-heon of IZM called the track as "well controlled despite the fast progression on the strong base rhythm", praised the low-tone chorus for its "simple yet bold sense of stability", and rated it three-and-a-half stars out of five.