In a world ruled by a corrupt pope and his loyal priests, Hamuratto can no longer stand idly by. When he kills one of the weaker priests, Belial, Hamuratto finds himself on the run, hunted by the pope's forces. Desperate and cornered, he is forced to kindle the flame of hope in the darkest place.

Hamuratto strikes a pact with Lucifer: deliver 1,000 innocent souls for access to Lucifer's legendary techniques. These techniques unlock a mathematical game called Demonic Dice, where players can win powerful organs. Hamuratto's goal is to win a heart worth 500,000 Adam's Energy, giving him a legit  chance to overthrow the pope. However, mastering the game's complex mathematics is his greatest challenge.

Hamuratto grapples with learning while haunted by the souls he sacrificed. Pursued by Segi, armed with a powerful heart, can he master math and Demonic Dice before Segi's vengeance consumes him? In a world on the brink, rebellion offers a glimmer of hope.