you was walking through the city as usual.
Listening to music, roaming through state-of-the-art facilities—it was the same everyday life.

Or so it should have been.

—Then, suddenly, that day
People vanished right before my eyes———

This is a world that has already fallen into decay.
Rows of white buildings.
Cracked walls.
White floors beneath a silent sky.
A city that still bears the traces of being rich in cutting-edge technology.

Luckily, food can be scavenged from buildings in amounts enough to survive without trouble.

But the only ones here are you all.

Why this city fell into decay, and why only you all remain in it.

How you live and how you die is up to you.