To be a hero is the cruelest punishment in this world. Those who have committed grave crimes are sentenced to become “Heroes,” forced to throw themselves into the war against the Demon King. Even if they are killed, they are compelled to resurrect. Death itself is not permitted.Sero Fulbaz, the former captain of the Holy Knight Order who has been subjected to the Hero Punishment, leads a penal hero unit made up of criminals with twisted personalities, charging on the very front lines of the battlefield. Within this brutal environment, Sero encounters one of the strongest biological weapons in existence, the Sword “Goddess,” Theolita.“Once you’ve annihilated all the enemies, be sure to praise me… and then pat my head.” To survive, and to take revenge on those who framed him, Sero forms a contract with “Goddess” and resolutely plunges into the raging flames of battle and the whirlpool of conspiracies that define this despairing world.