The ninth entry in Idea Factory's IF Neverland brand. You take control of Xeros, a "contractor" who lost all memory of his past. Along with Adel, who encounters Xeros while on a journey in search of her parents, you'll head off on adventure. The game uses a simulation battle system featuring combination attacks and powerful "Hold" moves.

Set nearly two decades following the end of the Seven Years' War chronicled in Spectral Souls II's True Ending (modified Rozess Army route) the story follows the somewhat random misadventures of a freelance Contractor named Zelos and crew, who by various circumstances, is at the center of a conflict involving Elemental Cores which both beings called Human Genomes and a group known as the Original Saints are also searching for as these Elemental Cores are both the key to healing the war ravaged world of Neverland and the trigger for enthroning the intended successors of the current humanity, the Human Genome as the new dominant race. Along the way various subplots involving the cast flesh out this 'war behind the scenes".