"Ara, ara... It looks like you died. How tragic..." These were the words a wandering spirit heard before being thrust into another world: Budget.

In the distant, far reaches beyond that of the known universe, the world of Budget is in serious trouble. An alien lands on the world, declaring itself the Demon Lord. It wreaks havoc across the world; destroying bridges, flooding the world with monsters and being an all-around nuisance that keeps everyone from enjoying their lives.

The Goddess of Budget created the world, but she only spent 131,072 god points on the planet (which seems like a miniscule amount to spend). She is limited by what she can do to intervene, but given the Demon Lord is a space alien, she sent statues of herself to protect the towns, but that will only last for so long. She is searching for a hero powerful enough to slay the Demon Lord, and after enough hardship, she finally found one.

Enter the player, a brave soul that was reincarnated and transferred to the world with Budget with a single goal in mind: Destroy the demon lord and save it... He will have to grow strong, collect special equipment and figure out a way to get to the Demon Lord's castle that has been blocked off.