A world inhabited by carnivorous, herbivorous, and omnivorous beastmen. The era is close to modern times, with cutting-edge technology found everywhere.

Everyone lives by helping each other and making the most of their individual traits. Livestock resembling cows, pigs, chickens, and fish exist and are sold in markets and supermarkets.

Schools are divided into classes for carnivores, herbivores, and omnivores (the same applies to dormitories if they exist).