Yuusha-kei ni Shosu: Choubatsu Yuusha 9004-tai Keimu Kiroku

The world entrusted the most evil yet powerful "Criminals" as hero. Hero's Punishment is the most serious punishment. People who are punished are criminals that commit a grave sin, they will atone for that sin as a hero. The punishment is to fight the Demon Lord's army that was caused by the Demon Lord's phenomenon at the front most line. Even if the monsters killed these heroes, they will be revived and must fight again.