Naughty Boys(浮気なぼくら,Uwaki na bokura; "Naughty boys"?) is the sixth album by Yellow Magic Orchestra, recorded from October 1982 to March 1983, and released on May 24, 1983. It contains the pop-oriented single "Kimi ni Mune Kyun", as well as a "preview" of "You've Got to Help Yourself", which was released in its full version on the companion album Naughty Boys Instrumental, and again with vocals on Service.
Naughty Boys was their final album to top the Oricon charts. After that, no technopop artist was able to reach No.1 until Perfume's 2008 album Game. "Kimi ni Mune Kyun" also became the highest charting single by a technopop artist on the Oricon charts, debuting at No. 2; a record the song retained until Perfume's "Love the World" debuted at No. 1 in 2008. "Ongaku" ("Music") was reportedly written by Ryuichi Sakamoto for his then-three-year-old daughter, Miu. Naughty Boys was re-released in 2004 in a double disc package alongside Naughty Boys Instrumental.
John Bush of Allmusic noted how the album sounds very different from their previous albums, praising it as "a solid album of commercial synth-pop" as well as the lead single "Kimi Ni Mune Kyun" for "featuring vocals just as accomplished as its production." Andrew Stout of SF Weekly has praised the album as "sensuous musique concrète perfected."
A remix album, Naughty Boys Instrumental(浮気なぼくら（インストゥルメンタル）,Uwaki na bokura (Instrumental); "Naughty boys"?), was released in July 1983 by record label Alfa. It contained nearly the entire Naughty Boys album as instrumental tracks in an entirely different running order, as well as the b-side to "Kimi ni, mune kyun.", "Chaos Panic"; and the full instrumental version of "You've Got to Help Yourself", which was released in "preview" form on the previous album. "You've Got to Help Yourself"'s vocal version is also featured on Service.
Naughty Boys Instrumental featured additional synthesizers imitating the vocal lines, as well as new embellishments and mixes. Several tracks featured sonically updated percussion tracks, while "Ongaku" featured an acoustic piano soloing over the piece.
Naughty Boys Instrumental was re-released in 2004 in a double disc package alongside Naughty Boys.