—A/N—

This story is a work of fiction, and has nothing to do with real life event, nor does it have anything to do with the original storyline.

—End—

Long ago, there's an event where it leads the nine realms to connect, they called it the 'convergence'. All the realms converged and met one another in a once in a millennia event. All inhabitants of each realms were confused, and so war broke down. A tragic war that only lasted for a few days. The reason for the end of the war is due to the world tree's influence. The world tree, Yggdrasil, was heartbroken to see the people fought one another. Yggdrasil plotted as all races battled at the battlefield of Midgard.

And so, during their final battle, Yggdrasil lifted the entire area of the war and separate it from the world. They called it the great separation. The entire land mass then turned into a castle, a floating castle to be exact. They called it, Aincrad. And then, the war was stopped as everyone involved disappeared. The nine realms soon separate themselves again, leaving nothing but peace.

As for those trapped in Aincrad, they all built settlements to survive. Powerful monsters emerged within the castle, and all the inhabitants struggled to survive.

After another millennia, a second convergence occurred. This time however, there's no war that broke out. Instead a tragic event take place. 10,000 human souls were transferred into Aincrad. These ignorant humans were confused and despaired at their misfortune. Their goal is to seize the castle and return to their homes.

And after 5 years, these humans managed to defeat the ruler of the floating castle, An Incarnation of the Radius, with the sacrifice of 2,345 human lives. As soon as the defeat fall of Aincrad occurs, the entire land mass slowly floated down to once it came. All inhabitants were hoping to see their families once again. However, much to their dismay, the flows of time travels differently in Aincrad. While only five years has advanced in the castle, almost a million years had passed on the surface world.

The world for once they knew was no longer there. The clear blue skies all turned muddy as if its been polluted. The land that was filled with lush greenery was a wasteland filled with mutant animals and an unknown metallic entities. It's a scene straight out of a post-apocalyptic world.

And so, the third convergence occurs that day that involves three individuals to meet.