Project SEKAI COLORFUL STAGE! feat. Hatsune Miku (often shortened to 'Project SEKAI' or 'Proseka') is a rhythm game developed as a collaboration between SEGA, Craft Egg, Colorful Palette, and Crypton Future Media. The first server of Project SEKAI was released on September 30, 2020 for iOS and Android devices. all characters from project sekai but in a gacha reaction vid so pjsk reacts to Voice Actors.