was a Japanese girl group formed by Avex Pictures in 2012. The group debuted through the Pretty Rhythm anime series, where they hosted the live-action segments in each episode and later released their first song, "Everybody's Gonna Be Happy", on 16 March 2012 as one of the ending theme songs to Pretty Rhythm: Aurora Dream. Fictionalized versions of themselves appeared as the main cast of Pretty Rhythm: Dear My Future to promote their activities. After the end of the Pretty Rhythm series, Prizmmy continued to perform theme songs to the series' successor, PriPara, joined with the trainee group Prism Mates as back-up performers. As a collective group, they performed under the name Prism Box. After PriPara ended, the group disbanded on 31 March 2017. History 2011-2012: Debut In 2011, Mia Kusakabe, Reina Kubo and Karin Takahashi were in a pre-debut trainee group called Prism Mates, where they would participate in the "Pretty Rhythm Studio" live-action segments at the end of each episode in Pretty Rhythm: Aurora Dream. The segments followed them training in dance, singing, and fashion sense for their debut, much like the main characters in the show. The members were all students from Avex Dance Master. In 2012, Kusakabe, Kubo, and Takahashi debuted under the name Prizmmy, along with a fourth member, Ayami Sema. Sema was the winner of the Pretty Rhythm Award at the Kiratto Entertainment Challenge Contest 2011 Summer, who had also previously worked as an exclusive model for KiraPichi. Their debut single, "Everybody's Gonna Be Happy", was released on 16 March 2012 as the fourth ending theme song for Pretty Rhythm: Aurora Dream; the B-side, "Popple Heart", used in a commercial for the Popple Heart toy from Takara Tomy. On 25 April 2012, Prizmmy released their second and third singles: "Dear My Future" and "My Transform", as the opening and ending theme songs to Pretty Rhythm: Dear My Future. "Party Driver", a B-side from "Dear My Future", was featured in the series as an insert song. Fictionalized versions of the members became the main cast of the series, while Prism Mates had reformed with a new generation of trainees to accompany Prizmmy in hosting the "Pretty Rhythm Studio" segments and appearing in their music videos as back-up dancers. On 29 August 2012, Prizmmy released their fourth single, "Brand New World!", as the second opening theme song to Pretty Rhythm: Dear My Future. Following the release,