Royal Slave

Chapter 1 Story
In the kingdom of Toritonia, an absolute monarchy reigns. Thanks to the king’s protection and the strength of the royal knights, the kingdom has enjoyed a long period of peace without major wars.
Klaus, a knight of the royal guard, is framed by political enemies and exiled from the kingdom. Years later, he returns at the head of his own army and, in a surprise attack, seizes the seemingly impregnable royal castle in a single night.
The royal family is captured and executed one by one. However, Princess Alma is spared—not out of mercy, but to satisfy Klaus’s dark desires. As her noble body is defiled and trampled, a tale of revenge, blood, and lust begins…

Chapter 2 Story
Having confined Princess Alma von Toritonia and reduced her to a state of complete submission, Klaus grows bored of her. His dark desires now seek a new target: Erika, Alma’s half-sister and a devout servant of the gods.
Klaus schemes to deceive the pure and untouched Erika, aiming to claim both her body and her status. As the saintly maiden is defiled, her faith in the gods is gradually replaced by carnal desires…

Chapter 3 Story
Having married Erika, a royal-blooded saint, Klaus secures his position of power. But his thirst for revenge remains unquenched, driving him to seek new blood and flesh.
When news arrives that Queen Cornelia, Erika’s mother, has been captured, Klaus turns his attention to the mature queen, finding new pleasure in her captivity. In a world shifting from peace to chaos, where will Klaus’s path of revenge lead?
The Royal Slave series reaches its conclusion here!

[Translated from dlsite]