Sentenced to Be a Hero, Vol. 1 (Light Novel): The Prison Records of Penal Hero Unit 9004 (novel)

Heroism-a punishment for only the worst criminals. Those sentenced to the fate of a hero are forced to fight at the front lines against the demon king's army-and if they die, all they can expect is to be revived and continue the battle. But when their leader, convicted of killing a goddess, meets another goddess himself, the contract they forge may be enough to change the world...