[1] Asako Miyazaki and Aya Matsumoto had been childhood friends, but Misaki Yoshikawa met the others for the first time at high school.

[1] In May, the band competed at the Teens Rock in Hitachinaka music contest, where they won the grand prize and the best vocalist award.

[2] The band released their debut CD in October with "Shukudai ga Owaranai", a single exclusively sold at Tower Records.

At the same time, the band members became radio personalities for All Night Nippon R.[1] In January 2013, they released Sotsugyō Seisaku, a compilation of their songs recorded while at high school, and toured Japan in March.

[5] Regarding the song, titled "Jibun Kakumei", Miyazaki explained that she wrote the track with the story in mind and hoped that it would help listeners to have the courage to change themselves like the main character.