"Butterfly" is Japanese pop musician Kumi Koda's sixteenth domestic single. The single came in CD and CD+DVD, with the latter editions containing a foldout poster. Because her previous single "Hot Stuff feat. KM-MARKIT" was re-cut to become the final single for secret, "Butterfly" became the first single for Best ~first things~.

The single became very successful for Kumi, causing Kumi's ero-kawaii style to become popular among the high school and young adult communities in Japan. The single would go on to win several awards, including "Best Video of the Year" and "Best Female Video".

"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 #1 on the Oricon charts and remained on the charts for twenty-two weeks. Although the single debuted at #1, it dropped to #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's 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.

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Wikipedia