It all started with a cyber pandemic...

A cybernetic virus capable of infecting humans spread on the worldwide web.

With just 15 seconds it spread all across the global network infected billions of network users just an instant.

Caused a large number of deaths globally. In response to the nascent XORA, the globe shut down its main net immediately.

Without access to the cyberspace, human society rapidly recended into the dark age...

The infected, their eyes bled and scabbed, rendering them blind...Akin to a curse, the infected were impaired by the same illusion over and over again, destined for ego-death.

All mumbling "SORA" [空] before they died.

The world declined into extreme chaos, beholding an uncertain future, in fear.

Over time, the "X" took precedence over "S", as they feared XORA's return if her name was uttered in full again...

Not long after the arrival of XORA, humanity entered a new chapter with the birth of the first immortal infected being - the Silver.