"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."