After offending a high-ranked magic user in the kingdom of Zeth, Rance was ironically thrown into the slave camp while his magic-using slave Sill was treated as a VIP. Vowing vengeance, Rance joined up with an underground resistance group determined to overthrow Zeth's government (and be reunited with Sill).

https://fapforfunblog.blogspot.com/2017/01/h-gamesadv-rance-vi-5d-english-uncen.html