:3 Hatsune Miku: Colorful Stage!, known in Japan as Project Sekai: Colorful Stage! feat. Hatsune Miku(Japanese: プロジェクトセカイ カラフルステージ！ feat.初音ミク, Hepburn: Purojekuto Sekai Karafuru Sutēji! fīcharingu Hatsune Miku), abbreviated to PJSK or Proseka, subtitled Brand New World from its 3rd anniversary, is a rhythm game developed by Colorful Palette, a studio of CyberAgent's Craft Egg, who also was involved in development before it shifted to Colorful Palette, and published by Sega Corporation. The game is a spin-off from Sega's Hatsune Miku: Project DIVA series, and features Crypton Future Media's virtual singers Hatsune Miku, Megurine Luka, Kagamine Rin and Len, MEIKO, and KAITO, alongside the cast of 20 original human characters that are split into five units, each with a unique theme.