The 2013 TV anime series Pretty Rhythm: Rainbow Live was announced to receive a spin-off movie titled King of Prism by Pretty Rhythm. It will open in theaters in Japan on January 9, 2016.
King of Prism follows the three-person boys' unit Over The Rainbow, which was featured at the end of the Rainbow Live series. It consists of Kouji Mihama, Hiro Hayami, and Kazuki Nishina.
The unit Over The Rainbow succeeds in its debut. Aiming to become like the boy band, more students enroll in Edel Rose. Hiro and the others begin practice for the Prism King Cup, an event that is held once every four years. However, a rival called "Schwarz Rose" appears... Who will become the Prism King, the one who can make girls' hearts throb the most?! (Source: ANN)