Based on the game by Black Lilith.

Taken prisoner through the main character, battle princess Lotte has finished training becoming a slave made as a way to prolong her life. Slave maids tend to be trained maids traded on the list of noblemen. While providing sexual services, additionally they live by being guards who take their lives at risk to the protection with their masters, making them very valued to both royalty and noblemen. The battle princess loses her virginity and contains to endure dirty and degrading training as a way to turn her whole entire body in a sex toy.