Terra. Its beauty is astounding. Was astounding, that is.

One day, a small creature came into creation. A tiny, pathetic-looking being.

And yet, the appearance of this creature signaled the beginning of the end.

Being low in population, they should've been destroyed fairly quickly. However, these beings were not of this world. What they killed and ate, they absorbed and adapted into their genes. Perhaps a better word would be evolved.

These creatures ripped through every evolutional process, every genetic limitation, and continued onward. They grew in diversity, size, shape . . . and lethality. They had no limits, and no barriers could stop them. These godlike creatures were unstoppable. The humans call them Aragami - Demonic deity incarnate.

Aragami – beasts of which only death and destruction lie in their wake – have taken over as the dominant life form. No one knows where they came from, why they kill humans, or how they evolved so fast, and at this point in history, not many people care. Aragami come in many forms, and not even the best manmade weapon could hurt them.

Cities were destroyed, nations disbanded, humans slaughtered by the millions. There was no rest, nowhere to run, nowhere to hide. It seemed like humanity's extinction was inevitable. . .

That is, until someone created a weapon called a God Arc. To summarize, a God Arc is what was formed when someone destroyed one of the weaker forms of Aragami, stole the object that kept their cells stabilized - an Aragami 's Core - and synthesized it with machinery. It is the only proven effective weapon against the Aragami.

This, however, came with its own problems. The materials used in a typical God Arc are cells from Aragami, called oracle cells, which are more destructive than the most virulent plague. A single touch to human skin spells doom for the infected individual. They transform, rather quickly, into Arigami themselves, and kill indiscriminately, whether its target is a best friend, a family member, a lover.

The need for protection against Arigami and Oracle Cells was vital, if humankind wanted to stall their extinction long enough to find a solution. Taking oracle cells, various chemicals, and genetics of various origins, humans created a possible "immunization", if you will.

Scientists called it the Bias Factor, and it was a dangerous gamble. It is injected into the bloodstream of an average human, and that builds up a resistance to the oracle cells.

Not quite safe from the infection, but not completely helpless either.

One problem among many was the Bias was experimental, unstable. It had an extremely low rate of success, and God Arcs had an ever changing "synchronize tune", to make a comparison. The Bias and the God Arc had to have the same 'tune' at the moment of contact between the weapon and the human, or the Bias would be rejected and infection would occur.

At first, perhaps only 1 out of every 20 escaped infection. As the new 'God Eaters', as they were called, fought the Arigami and stalled for time, the Bias Factor was upgraded, civilians injected, and the procedure for locating a Bias match improved. Humanity was beginning to fight back.

Statistics show that, of several age groups, those between the ages of 12 and 19 had the highest chance for Bias synchronization. Perhaps because, as they have yet to mature, their brains can grow to accept the synchronization easier, and even contribute to molding into a match? Regardless, this was the age group that was chosen as the main fighting force.

Unfortunately, humanity's days were still numbered. Over 95% of Terra's human population was killed, the last 5% scattered across the destroyed continents. They needed a way to regroup, dig in, and salvage what little supplies they had left.

Bases were built, reinforced with the Bias Factor and further protected with a large Bias-infused wall around the base, called an Anti-Arigami Wall. This did not, in any way, guarantee the survival of the human race. However, it did buy precious time. They needed a way to communicate; a command center, if you will.

Thus, Fenrir HQ was built. What was left of the world's governments was moved here, and the best defenses were built around it. This enabled the various Branches, scattered across the world, to communicate and know that "we really aren't alone. We aren't all that's left."

The humans who had paved the path to the future, the adults whom knew what humanity was facing, had entrusted it to the next generation. The children whom were protected before must rise and protect, now. People finally had hope. Hope in a brighter future, hope in a future at all.

But, I can't have this entire story being monologued in a history lesson, can I? Allow me to show you the stories of a few, special individuals. The stories of life, of death, of love, of loss, of heroism and darkness, and all the shades in between.

This is the story of Kinaia Tsumi and Kama Kotaku, two young children called to join the fight for survival. Far different lifestyles, far different lives. What will their tales bring forth?

What will be the next segment in this symphony of death and chaos?

A/N: This chapter is more of an outline, in case people don't know the specifics behind the GEB storyline. It's basically my retelling of Sakaki's lessons, and I like my wording better :P

Cheers~