Joshua is an overworked, underpaid production mage for the prestigious Knights of Schwarz order. When the order's corrupted commander dismisses Joshua from his toxic job, he embarks on a quest for a new purpose. Along the way, Joshua's path intertwines with Illya, the princess of a Demon tribe, whom he saves from hunters targeting “demi-humans.” As thanks, he's welcomed to the Demon tribe village. Witnessing their torment by the Demon King's army and slave traders, Joshua resolves to employ his production magic to aid them. Get ready for a fantasy where the greatest production mage and his friends work together to craft a splendid nation!