Long ago, humanity evolved into beasts and then into something else. Carnivores with fangs and claws, herbivores with strength and athletic ability, and the lowest class, humans, with nothing. Bucchi, a young girl, is forced to work as a maid in a beastman's mansion to pay off her debts. Her life changes completely due to a "beastification experiment"! Carve out your own future with your own fangs and claws! A rebellious beast fantasy set in a beastman world!