Endless Planar Wars

Five hundred years ago, the Infinite Plane World experienced a destruction and a rebirth. The heart of all the Plane Worlds, the Heart of the Plane, turned into fragments and drifted to other planes. All the fragments of the Heart of the Plane that drifted to the Moon-shaped World were embedded in the wishing machine called the Holy Grail.

A powerful World Infiltrator snatched the Holy Grail and its shards. In order to retrieve the Holy Grail and its shards, Gaia and Aliya decided to choose an Executor from other planes to form a team of Master and Servant Executors.

A special interdimensional Holy Grail War is about to begin.