Ayatsuji Sai was a shy, ordinary boy until one fateful day….

Having made an oath to eliminate humanity, a dimension-piercing machine called “Annihilator” arrives and changes Sai’s fate forever: The “Annihilator” mecha has sworn an oath to exterminate mankind! But when an even bigger threat reveals itself, the boy and mecha team up! Will the bickering duo be able to put aside their differences long enough to fight against the threat from “Zero Earth,” a parallel world that has already destroyed 8,730 other Earths?! This epic mecha action manga is serialized in Shonen Magazine Edge.