This simulator is set in a world of shifters and humans. shifters have the soul and spirit of an animal, while a human does not. Shifters have marks on their wrists to show that their shifters, but humans don't know what they are. only shifters know who another shifter is. this could be because they can smell the difference between a human and shifter, or because of their mark. (mark also matches the one of that shifters soulmate) humans don't know shifters exist.