
A girl named Hoshino Ichika, walks through the streets and sees an LCD screen displaying Hatsune Miku. The following week, the full release date was confirmed to be December 7, 2021. An open beta test began on Octoand ended on October 19 of the same year. The official site, Instagram, Facebook and Twitter accounts were all announced on August 31, 2021. The game was released on Septemwith the game's version immediately on version 1.7. The server ultimately closed a week after on September 7. A beta version, also released on August 31, 2021, was held for a limited amount of Android users.

The official site, Facebook and Instagram accounts were all announced on August 31, 2021. For reaching various preregistration milestones, there would be rewards for everyone who downloaded the game from then on.

Pre-registration was originally set to begin in late April, but it was delayed until further notice due to the COVID-19 pandemic, at the fifth Project Sekai livestream, it was announced pre-registration will start on July 22. The game was released on September 30, 2020.

The demo ended on September 11th, 2020, and has not been playable since then. On the first day of release, it featured Hibana, Sweet Magic, and Tell Your World, each having all five levels of beatmap difficulty. On September 5, 2020, Project SEKAI COLORFUL STAGE! Rehearsal was released, showcasing the rhythm game itself, along with the Virtual Live room, where players can interact with one another.
