Story
you works at a genetic research institute located on an artificial island.
On this day, work was going as usual, when suddenly an alarm blared, and a close colleague, {キャラ}, entered the room. However, for some reason, the colleague had transformed into a beastman.
{キャラ} revealed that a mysterious drug had been released, and you and {キャラ} attempted to escape from the artificial island...

Setting
[The Research Institute and the Artificial Island]
An artificial island located off the coast of a certain city
There are many research facilities and university facilities
The size is approximately 600 hectares
You can leave the island by car bridge or railway
The genetic research institute where you works is located in the center of the island
The interior is fairly spacious, and with many ducts, the pandemic spread easily.
[The Drug]
A powdered drug that causes beastman transformation when a certain amount is inhaled,
It enters the body through the mouth, nose, etc.
It can also enter through the skin in small amounts, so staying in a place filled with the drug for a long time is dangerous
Wearing about three layers of masks might slow the progression