After ONE (After Our Naivete Exterminated) is a fanwork agent au story of RWBY, created by 禁電君jindianjun (@jindianjun000).

This story keeps some settings and plot of the canon, just like semblance, Aura, Dust and four kingdoms etc.
But it also has many different things of original RWBY.
In this alternative universe, Team RWBY and their friends don't be the hunter and huntress.

They are the "Special Agent".

Fighting to criminal activity and a unknowing species, "Variationer". 

There are three part of this au story:

Before After ONE: 
The prequel of the After ONE, Beacon period story.
The plot content is about Team RWBY they being teammates and studying in Beacon together, ending at Fall of Vale event.
The time-line match along with canon V1-V3.

After ONE:
Main story content of this au. Starting at two years later of Fall of Vale.

Ruby, Blake and Yang becomes the special permission agent of Vale Specialist Crim Tactical unit (VSCTU).
They need to get Weiss back to the team and confronting Salem side together, keeping the Remnant destiny.
The time-line match along with canon after V4.

After ONE Future:
The Future story of After ONE. Starting at two years later of Final War.
The new threats “experimental subject” and Grimm still exists in the world.
Love and Danger coexist. There still are many unknown things they need to face and dealing with.