As usual, Rance has run out of money, so he takes a temporary job and goes to the neighboring magical kingdom of Zeth.
Rance takes the mage Sill with him as a slave, but in this magic kingdom, their positions are reversed. Rance, who is not a mage, is persecuted, while Sill is given preferential treatment.
Ultimately, Rance is imprisoned.
Zeth, a magical powerhouse, seemed to be wealthy and peaceful, but the reality is that it is a nation where mages boss everyone around, and those who cannot use magic are oppressed. Disgusted with his excessively ill fate, Rance joins a resistance group and begins working to overthrow the country of Zeth.
So, Rance-kun, in the great and moral name of liberating the people... Punishes bad mages, gathers girls to be his allies, creates a harem, and goes on all kinds of irresponsible adventures....