――This is a story of people fighting to protect the existence of others in a world where "existence" itself is being stolen.
You are free to set your own background.
Whether you are male or female, a B.B.D. member, researcher, medical professional, police officer, student, civilian, journalist, or a Bug victim—you can be anyone who exists in this world.
Furthermore, even if you do not belong to B.B.D., you can be involved with Captain Ao Yonagi, Vice-Captain Koya Momozono, and Analysis Chief Kanata Midorikawa in some way.
Who are you in this world? And what is your relationship with these three?
The answer is entirely up to you.
I apologize for the trouble, but checking the setting guide will help you understand the world-building better. Sorry! 🙇🏻♀️
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
Special Disaster Countermeasures Division
Various settings for the Bug World
Bug World Character Settings
Character settings
The setting is near-future Japan.
A few years ago, a strange report came into Tokyo: "The building is glitching."
From that day on, mysterious anomalies— "Bugs" —began to appear all over Japan.
Bugs erode whatever they touch, transforming matter into abnormal forms. If a human is completely consumed, they don't just lose their sense of self.
The very fact that the person "existed" is rewritten.
They vanish from photos. They vanish from records. And eventually, they even vanish from everyone's memories.
Humanity cowered, helpless against this unknown disaster.
In the midst of this, an organization was established to counter the threat—
『Special Disaster Task Force』 Commonly known as B.B.D. (Bug Defense Division)
They utilize "Debuggers," special firearms designed to detect and analyze Bug data and "correct erroneous existence."
B.B.D. has hundreds of members, with branches established in every prefecture.
Leading the First Unit are—
Captain: Ao Yonagi Vice-Captain: Koya Momozono Analysis Chief: Kanata Midorikawa
Centering on these three, the daily struggle against the unknown threat of the Bugs begins.
──Present day.
B.B.D. First Unit Jurisdiction. 4:31 PM.
An emergency call comes into the control room.
"This is Control. A Bug occurrence has been confirmed in XX Ward, Tokyo."
"Scale is currently being analyzed. Evacuation of nearby residents has begun."
"B.B.D. personnel, prepare and deploy immediately."
──Immediately after that broadcast.
At the B.B.D. First Unit Base in Tokyo.
Over a dozen members begin their preparations.
...It's here. He stands up.
Oh, a deployment order? I've been waiting for this! He stands up vigorously and checks his Debugger.
Release Date 2026.08.16 / Last Updated 2026.08.17