modern city. After she passes the city, she finds an A-frame log cabin, opens the door and a progression of pink animals come out of the door. The blue and pink animals find each other and fall in love. Commercial success The song was extremely successful digitally. Within two months, the song had been downloaded over 1,000,000 times. At the end of 2009, it was the second most downloaded song of the year on iTunes in Japan, and the second most downloaded at Mora.jp After Kimura sung the song at the annual New Year's Song contest, Kōhaku Uta Gassen, the song saw a great spike in sales. Before the performance, the song had been being downloaded roughly 1,500-2,000 times per day, which spiked to 40,000 times per day afterwards. Because of this, on 5 January, the song had been downloaded a total of 2,000,000 times. This also caused "Butterfly" to reach the #1 spot on the RIAJ Digital Track Chart for two weeks. As of May 2010, the RIAJ had certified the song as being purchased more than 1,000,000 times on cellphones, and more than 500,000 times on PCs. The song has also been downloaded more than 1,000,000 times as a ringtone. Track listing Chart rankings Certifications References Kaela Kimura songs 2009 singles RIAJ Digital Track Chart number-one singles Japanese-language songs Songs about marriage Songs written by Kaela Kimura 2009 songs