The Kusaribe family is a family of sorcerers under the protection of the ‘Tree of Origins.’ Their princess, Hakaze Kusaribe, was the greatest sorceress of their family. But Samon Kusaribe, a member of their family seeking to resurrect the ‘Tree of World's End,’ a tree that opposes the ‘Tree of Origins’ and controls the power of destruction, stuffs her into a barrel, and banishes her to a deserted island.

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!

The son of a world famous mystery writer, Jimmy Kudo, has achieved his own notoriety by assisting the local police as a student detective. He has always been able to solve the most difficult of criminal cases using his wits and power of reason.