This is a world in which people are divided into two types: people and demi-humans. Demi-humans are the same people only with the ears of some animal and with tails, some have the same instincts (Heat, bloodlust, desire for certain foods. It depends on whose ears and tails, most often demihumans have the ears of cats, dogs, rabbits, bears, but there are others.)

Fred stood in the corridor and thought with his twin brother what kind of prank to make.