As the title says, our story is about a game made by the Grim Reaper. The Reaper recreates a world were the deviant souls he gathered are placed there, and to fight for... The Reaper's Boredom. Would our fighters try to live in peace, while trying to survive the Reaper's attempts in creating a world full of death and chaos? Would they try to break the system and Challenge the reaper? Or would they fall to the system and fight for their lives, killing each of their own comrades?

Kurio Gouka was a Mercenary in his fathers guild. But when his brother betrays the guild and kills him, he meets Zeta, goddess of the void. With the help of his new demonic powers, a shy mage, a proud Amazonian tribeswoman, a sadistic goddess, a narcissistic mercenary, and a masochistic paladin, Kurio WILL exact his revenge.