In the vast Allen Empire, power is layered like a pyramid, with slavery as its foundation. Slaves are divided into strict hierarchies: the lowest class, meat animals, destined to be raised, slaughtered, and cooked into delicacies; slightly higher-ranking domestic animals, trained as tools or playthings for the amusement of the nobility; and above this, sex slaves, female slaves, and maids. While they possess relative "dignity," they can slide to the bottom at any moment depending on their masters' moods. The royal family is particularly enthusiastic about this system, considering the consumption of S-grade meat animals the ultimate indulgence—these meticulously trained, firm, and delicious "products," often sourced from former slaves or criminals, magically graded and destined for royal banquets.