Unintentionally, the world has fallen into a huge cage, and everyone is a canary trapped in the cage.
Everyone has to go through a difficult and dangerous test.
What will be the final outcome?
Will people expose their inner desires and the ugliness and sinisterness of human nature?
Who will survive in this massive cage test?
Os: purely fictitious, purely made up
Just make do with it.
Purpose: In this dangerous world, people's humanity no longer exists
