The tracklist mainly consists of Vocaloid songs, with most songs having two versions: the original version (named "Virtual Singer version" in-game), and Sekai versions, having the song covered by the original characters, and sometimes joined by a Virtual Singer. Some songs also have a 3D MV or animated MV, with animated MVs either being newly created for the game (named "2D MV" in-game) or original. Songs without an MV are played with a static 2D background. Commissioned songs Pre-existing songs Development The game was first announced on August 30, 2019, at Magical Mirai 2019. The development is done by the Colorful Palette, a newly established subsidiary of Craft Egg (who is already known for another rhythm game: BanG Dream! Girls Band Party). Yuichiro Kondo, the first producer of Girls Band Party, also serves as the producer for this game. The project started in 2017 and was initially being developed entirely by Craft Egg, but Kondo thought it was necessary to avoid a situation where the project would clash with the development of Girls Band Party, so he created Colorful Palette with Craft Egg's core members within the company. The title is a rhythm game that features arrangements of songs made by various artists over the years using the Vocaloid software. The original story of the game is told in a visual novel and musical film-style. The direction of the game's design and concept is different from other Hatsune Miku-related games, such as Sega's Hatsune Miku: Project DIVA, where the player and Hatsune Miku face each other directly and communicate in the game. The project is said to be "a work that embodies the existence of Hatsune Miku" and explores the relationship between music and people. One of the reasons behind this format was the idea of "wanting the younger generation to listen to more Vocaloid music and other songs from the internet." Therefore, while knowing that there could be people opposed to the idea of addition of original characters, it was decided to develop such a setting. The series's concept was also borrowed from Persona 5, albeit much more lighthearted tone. Release The game's pre-registration was originally set to begin in late April, but was delayed until further notice due to the COVID-19 pandemic. The pre-registration later started on July 17, 2020, and Sega revealed the goals were set from 100,000 to 1,000,000 pre-registrations. In September 2020, the pre-registrations later