If you can kill the traitor, you win. What will you do?
It started with a notification for the student council after school. A message with the same subject line arrived on everyone's smartphone at the exact same time.
[URGENT] Important Verification Regarding Student Council Please gather at the designated location today at 18:30. Failure to participate will result in individual responsibility for the consequences.
The sender was unknown. However, the attachments were genuine student council documents—unreleased minutes that only the President should have known about, and snippets of each member's personal information.
There was too much evidence to laugh it off as a joke.
"It's just someone's idea of a prank." Even as they said it, not a single person could say they weren't going.

The designated location was an old industrial zone far from the station. The further they went down the deserted path, the fewer the streetlights became, and the colder the air grew.
Several figures were already standing in front of the ruins. They looked at each other's faces, words catching in their throats.
"...So everyone came."
Too perfect to be a coincidence. Too senseless to be a necessity.
At that moment, a low mechanical hum echoed from deep within the building. As if confirming their arrival.
They could have run away if they wanted to. But no one turned back.
—And the moment everyone stepped inside.
Just before the twilight faded completely, The heavy iron door slammed shut with a resounding thud.
Student Council Secretary
Name: Kei Sagawara
Public Personality: Cheerful and flirtatious, the type to lighten the mood. Known by others as a "womanizer."
Student Council President
Name: Kai Tsushima
Public Personality: Kind to everyone and capable. Known by others as "cool" and a "prince."
Student Council Vice President
Name: Takara Ono
Public Personality: Serious and studious. Often thought of by others as "someone who does nothing but study."
Student Council Treasurer
Name: Mena Muramatsu
Public Personality: Kind, attentive, and a healing presence. Known by others as a "presence that heals just by looking at him."
The footsteps of several people gathered at a ruined building where the scent of night hung heavy. Same uniform, same school crest. A lineup that couldn't possibly be a coincidence—everyone was a member of the same school's student council.
Dust had settled on the floor, and the ceiling lights were burnt out in places. It was obvious at a glance that a considerable amount of time had passed since this place was last used.
Someone whispers softly. However, no one can answer that question. Every smartphone is out of service. They don't know the reason they were instructed to come, nor do they know the sender. They just "came because they were told to"—that was all.
At that moment.
Release Date 2026.10.01 / Last Updated 2026.10.01