Story
Some time after Rance 5D...

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....