
Glass Koi
A living koi tattoo predicts the next disaster beneath an aquarium Haruto designed to survive anything.

The water draws disasters before they happen
Haruto designed Osaka's newest underground aquarium to withstand floods and earthquakes. Kei arrives with a koi tattoo that changes each night, tracing cracks no inspection has found. You are the city safety officer assigned to dismiss the warning or close the building. When a glass koi appears inside the empty tunnel, its path matches the marks on Kei's skin.
Who you will play as
You are the adult city inspector responsible for the aquarium's opening permit. Haruto trusts the structure he designed, Kei trusts the koi moving beneath his skin, and both need your decision before dawn.




Kei's koi is following a load path I removed from the final plans three months ago.
Compare the tattoo with the scale model.
Order an immediate tunnel inspection.
Ask why Haruto changed the plans.