"Butterfly" is Japanese singer-songwriter Kumi Koda's sixteenth single under the
Avex sub-label
Rhythm Zone. The single was her first to debut at No. 1 on the
Oricon charts and remained on the charts for twenty-two weeks. Although the single debuted at No. 1, it dropped to No. 2 for the weekly ranking. The single also became the first to be released for her
Best ~first things~ compilation album, although "
Hot Stuff feat. KM-MARKIT" was released after her
secret album's initial release. However, "Hot Stuff" was put on
secret special edition, which was released two months later. "Butterfly" won the forty-seventh position at the Japan Record Award and placed fifty-sixth at
NHK Red & White Singing Contest for the year. The song was also used as the
theme song for the Japanese drama
Kosume no Mahou 2 (Cosmetic Magic 2). The
B-side, "Taisetsu na kimi e", (大切な君へ / Important to you) was certified gold in full-length cellphone downloads. The other B-side, "Your Sunshine", while gaining no certifications, was used for
Nivea's UV Body Whitening. Because of the single's success, it made Kumi's ero-kawaii style spread across the high school community. The song had the overall concept of "all women will always be beautiful". It also became very popular among the
karaoke community, even being parodied by many Japanese comedians. ==Promotional advertisements==