This app is a quiz app about Project Sekai feat Hatsune Miku and original characters.

On August 30, 2019, at "Magical Mirai 2019", one of the largest combined events related to Hatsune Miku, a new smartphone game project "Project Sekai" was announced.

The genre consists of a "rhythm game" that uses vocaloid songs, and an "adventure game" that unfolds a story with Hatsune Miku and original characters. The direction of the game design and concept is different from previous works such as Sega's "Hatsune Miku -Project DIVA-" series in which Hatsune Miku was appointed. Until now, Hatsune Miku-related works have had a format in which the player and Hatsune Miku face each other directly and communicate with each other through rhythm games and the like. On the other hand, in this work, Piapro characters such as Hatsune Miku "Virtual Singer" are set in two worlds, Shibuya in modern Japan and "Sekai", a place born from the "true feelings" of original characters. , It is a strong story format that supports finding the true feelings of 20 original characters of this work, boys and girls who have troubles and anguish in the real world. For that reason, while focusing on the rhythm game part where you can play various VOCALOID songs, we are especially focusing on the story that depicts the story of the original characters. It is a work that has a strong aspect as character content, in which 20 boys and girls play a rhythm game while enjoying their youth stories. It is said that this work will be "a work that embodies the existence of 'Hatsune Miku' that supports the relationship between music and humans." The reason for this format is that this project was started with the idea that "I want the younger generation to listen to Vocaloid and music from the Internet more." Therefore, after knowing that there are people who are reluctant to put out original characters, we dared to plan such a setting. In addition, as a unique feature of this work, the live function "virtual live" described later is implemented.

Developed by Craft Egg, a subsidiary of CyberAgent, which develops and operates "BanG Dream! Girls Band Party!", and Colorful Palette, a new subsidiary within Craft Egg for the development of this work. Yuichiro Kondo, the first producer of "BanG Dream! Girls Band Party!" The project was proposed by SEGA in 2017 and was initially developed at Craft Egg, but it was necessary to create a situation that could not be withdrawn in order to develop a hit work following "BanG Dream! Girls Band Party!". Thinking that there was, Kondo established Colorful Palette as a subsidiary within Craft Egg with the core members of the Project Sekai development team within the company. The core members of development consisted of members who were involved in the early days of "BanG Dream! Girls Band Party!" at Craft Egg. In January 2021, the business was transferred from Craft Egg to Colorful Palette. From the beginning, we had consistently done everything from the planning stage to development with Colorful Palette, but since there was no development track record for Colorful Palette at the time, it was decided that it would be better to advertise under the joint name of Craft Egg. After that, the app was released and showed sufficient results, so it was judged that the timing of the business transfer was good, and the business transfer was carried out on January 8, 2021. In development, we have inherited the production style of our parent company Craft Egg, and in addition to character design, we also do key visuals, in-game card illustrations, costume design, card illustrations, background art in the story, logo design for various events, and settings.・Scenario creation is also done in-house by the Colorful Palette team.

From the "Hatsune Miku -Project DIVA-" series, producer Seiji Hayashi participated in the music and scenario supervision support for this work, and the development team of the "Hatsune Miku -Project DIVA-" series participated in the 3DMV. SEGA's development team, which was in charge of CG development for "Hatsune Miku -Project DIVA-", is in charge of 3D modeling. Marza Animation Planet, who directs and produces the animation of the same work, and also directs and produces animation for live performances such as "Hatsune Miku Magical Mirai" and "SNOW MIKU LIVE", is in charge of 3DMV motion capture supervision, 3DMV animation supervision, and 3DMV production. is doing. In addition, companies that have been involved with Hatsune Miku so far, such as Solid Cube, who was also in charge of the choreography and motion actors for the "Hatsune Miku -Project DIVA-" series and "Hatsune Miku Magical Mirai", will participate in the 3DMV choreography and motion actors. are cooperating in the planning.

Vocaloid producers who are active in the industry participate in this work as music creators, and creators such as DECO*27, Mitchie M, PinocchioP, Giga, and Mafumafu create the theme songs for each unit and this work. Produces original music. In addition, we will also solicit songs from the general public, and if they are adopted, they will appear as songs that can be played in the 2D mode of the rhythm game part.

In the game, you can change the clothes and accessories of the character 3D model. An illustrator who has a connection with Vocaloid participated in the costume design, and a design that was open to the public was also adopted.

Rhythm game" and an "adventure game" in which the story of Hatsune Miku and original characters is developed.