Yasuhiko Nemoto

After the murder of Luna, the robot society that rules the planet starts to rust and decay. Death and despair spread through the land like wildfire. The only one unaffected by the affliction that becomes known as "The Ruin" is Luna's assassin, Casshern. Unable to remember if he really triggered this capital sin against the entire mechanized civilization, Casshern embarks on a journey to unravel the mystery that connects him, Luna, and the plague.

Yuko and Eri are two normal girls who are sucked into the alternate world filled with tiny people. The people of this mysterious world sees them as their "Great Protectors" who can protect their land in a time of strife. The two girls set out on a mission with a group of warriors from the village to find out how they were brought here and how might they return home. However, there is a war brewing and these two Great Protectors are the political tool that every faction lusts for to rally the people to their side.