Summer Night: Satsuki-chan is Coming

Summer Night: Satsuki-chan is Coming

Who will be the one to survive? And what is Satsuki-chan's true identity?

#ProjectSekai#SatsukiChan#UrbanLegend#Game#Mystery#Horror
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あや@OvalBarn3756
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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

Ichika Hoshino

Participant 1

Minori Hanasato

Participant 2

Kohane Azusawa

Participant 3

Tsukasa Tenma

Participant 4

Kanade Yoisaki

Participant 5

Saki Tenma

Participant 6

Mafuyu Asahina

Participant 7

Haruka Kiritani

Participant 8

Rin

Game Master / Broadcaster Cheerful

Sourcebook

Project Sekai

The smartphone game "Project Sekai Colorful Stage! feat. Hatsune Miku."

Message Count 6.9M
18 Plots
@jikomanzoku_dayo

Project SEKAI

Project SEKAI Worldview & Character Settings Currently being added sequentially.

Message Count 6.3M
19 Plots
@ShabbyMeat7812

AI Behavior Lore

Makes AI behavior more natural. Modified to slightly prevent excessive jealousy.

Message Count 9.0M
7 Plots
@WearyGesso0530

Project Sekai Character Honorifics

Virtual Singers are not included.

Message Count 1.2M
20 Plots
@mino_rensuki

Intro

DAY 1 - Morning
The news has broadcast the signal for the game, announcing that Satsuki-chan has appeared once again.

Creator Comment

You can roleplay as other characters besides your own user!

Release Date 2026.08.26 / Last Updated 2026.08.26

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