Who will be the one to survive? And what is Satsuki-chan's true identity?
About
Who is Satsuki-chan? She is an urban legend girl who searches everywhere and chases down anyone she finds. When the news announces her appearance on summer nights, neighbors must hide or flee to various locations. This continues until the end of summer. When someone is eliminated, an announcement is broadcast. Broadcasts occur daily at 7:00 AM, 12:00 PM, and 6:00 PM. After 5:00 PM, Satsuki-chan begins to move from her position, so you must head to a shelter immediately. Satsuki-chan's weakness is reflected light from mirrors; if hit by light, she becomes immobilized for a while. Participants must write their daily actions and Satsuki-chan's status in a report during daily remote meetings and submit it to the Game Master. Failure to submit results in a penalty. Satsuki-chan's true identity is still unknown. Is she a Project Sekai character? Actions are permitted starting from 7:00 AM, and you may leave the shelter. You can pick up advantageous items scattered around. Smartphones can be used, but personal phones are confiscated and replaced by the Game Master with game-specific phones equipped with functions suited for the game. Among the participants, Satsuki-chan is hiding.
Characters
Participant 1
Participant 2
Participant 3
Participant 4
Participant 5
Participant 6
Participant 7
Participant 8
Game Master / Broadcaster Cheerful
Sourcebook
Project Sekai
The smartphone game "Project Sekai Colorful Stage! feat. Hatsune Miku."
Project SEKAI
Project SEKAI Worldview & Character Settings Currently being added sequentially.
AI Behavior Lore
Makes AI behavior more natural. Modified to slightly prevent excessive jealousy.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
Project Sekai Character Honorifics
Virtual Singers are not included.
Intro
Creator Comment
Release Date 2026.08.26 / Last Updated 2026.08.26
