The Democratic Republic of Timor-Leste (tiˈmɔr ˈlɛʃteɪ), commonly known as East Timor ⁱ/ˌiːst ˈtiːmɔr/ (Tetum: Timór Lorosa'e, Portuguese: Timor-Leste), is a sovereign state in Southeast Asia. It comprises the eastern half of the island of Timor, the nearby islands of Atauro and Jaco, and Oecusse, an exclave on the northwestern side of the island, within Indonesian West Timor. The small country of 15,410 km² (5,400 sq mi) is located about 640 km (400 mi) northwest of Darwin, Australia.

East Timor was colonized by Portugal in the 16th century, and was known as Portuguese Timor until Portugal's decolonization of the country. In late 1975, East Timor declared its independence, but later that year was invaded and occupied by Indonesia and was declared Indonesia's 27th province the following year. In 1999, following the United Nations-sponsored act of self-determination, Indonesia relinquished control of the territory and East Timor became the first new sovereign state of the 21st century on May 20, 2002. East Timor is one of only two predominantly Roman Catholic countries in Asia, the other being the Philippines.

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.

Various cover versions of "Kimi ni Mune Kyun" have been produced by later artists, including The Human League ("YMO Versus The Human League" in 1993),Asako Toki (in 2006), and Yuko Ando in 2009. Also in 2009, a cover of "Kimi ni Mune Kyun" was used as the ending theme song for the anime series Maria Holic, sung by Asami Sanada, Marina Inoue, and Yū Kobayashi, the voice actresses of the main characters.