A short, overweight student uses the Neuro Link, an evolution of the Nerve Gear, to escape himself from the reality. But his skills in the virtual world brings him to the attention of Kuroyukihime, a popular student who introduces him to the Brain Burst.

A near future, where humans have been defeated by the viral parasites named Gastrea. They have been exiled into a small territory and live in despair, side-by-side in terror.

In this world trapped in darkness—

Rentaro, a boy living near Tokyo and member of the "Civil Security"—an organization specializing in fighting against the Gastrea—is used to accomplishing dangerous tasks. His partner is Enju, a precocious young girl. They fight thanks to their peculiar powers until one day, when they receive a special assignment from the government. This top secret mission is to prevent the destruction of Tokyo...

Set in a near future, this thrilling heroic-action story... starts now!