<noinclude> "Naughty" () is a song recorded by Red Velvet - Irene & Seulgi, the first sub-unit of South Korean girl group Red Velvet, for their debut EP Monster. The song was released as the second single from the EP. The track was written by JQ, Yeon-Ji Lee, Charite Viken, Louise Frick Sveen and Moonshine and was also produced by Soo-Man Lee, Moonshine, Young-Jin Yoo and Butterfly. A remix of the song with DJ Demicat was released on July 31 with a music video. Background and composition Following the release of "Monster" on July 6, 2020, SM Entertainment revealed that a follow-up song titled "Naughty" will be released on July 20, 2020. The song will then be used for the follow-up promotions of the duo's first extended play, Monster. The song along with the music video was released on the noon of the said release date. "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. A recorded pitched down voice by Charite Viken singing the lyrics "Naughty" was featured in the song. Musically, Lee Da-kyum of Star Today described "Naughty" as a future house-style pop dance song. Kim Soo-hyun of Sports Chosun noted "Naughty" for its bouncy beats, groovy bass lines, and addictive hooks. It was composed in the key of G major with a tempo of 113 beats per minute. The song's lyrics tell the story of comparison between tension in a close relationship to a hide-and-seek play. Reception Following its initial release, "Naughty" was met with positive reviews from music critics. 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. Melody Chiu of People described it as an "upbeat dance track with a catchy hook". It was included in CNN Philippines's "Our best K-pop songs of 2020". Paper cited its "groovy bass and pulsing rhythm" and put it at number 14 on their list. On the week of July 19, 2020, "Naughty" did not enter the Gaon Digital Chart and the Gaon Streaming Chart. However, it