Blue Remains

Deep-sea archeologist Hiroshi Ibuki is the member of the digging team working at the bottom of the sea hoping to uncover the origins of Earth's existence but instead uncovers a mysterious colony of bacteria which gives off light similar to the Aurora Borealis. The ancient bacteria, once revived, attempt to make the world habitable for themselves —a process that would bring Earth back to its early primal form, killing all current life in the process.

In the distant technological future, civilization has reached its ultimate Net-based form. An "infection" in the past caused the automated systems to spiral out of order, resulting in a multi-leveled city structure that replicates itself infinitely in all directions. Now humanity has lost access to the city's controls, and is hunted down and purged by the defense system known as the Safeguard. In a tiny corner of the city, a little enclave known as the Electro-Fishers is facing eventual extinction, trapped between the threat of the Safeguard and dwindling food supplies. A girl named Zuru goes on a journey to find food for her village, only to inadvertently cause doom when an observation tower senses her and summons a Safeguard pack to eliminate the threat. With her companions dead and all escape routes blocked, the only thing that can save her now is the sudden arrival of Killy the Wanderer, on his quest for the Net Terminal Genes, the key to restoring order to the world.

Imagine waking after spending more than two decades in suspended animation. You awaken to a world more terrifying than your worst nightmare. A world where human beings are hunted down by giant insect-like creatures called the Blue. Welcome to Earth in the year 2031...a time when the planet is no longer ours. Earth's very survival now rests in your hands.

The Antarctic thaws and it is an era when most of the land has been submerged in water. The extinction of Mankind already draws near. Mankind who were born from Adam and Eve, were now deteriorating as they repeatedly get cloned from generation to generation. Things essential for the survival of living things were lost. Even so, the ones remaining cling on to survive... "We should get what we need for survival from something else...!" And so, a mere small group of humans began a new life upon the surface of water, exhausting the resources of each and every other living thing to survive. In the end, they discover people who posess a huge quantity of things necessary for survival. The young men who posessed such things continues their journey even today, to escape from those who were pursuing them. They just wanted to find that something somewhere. They were seeking for the one and only "help" there was...