Catulus Syndrome (Disease)

The Catulus Syndrome is a fictional disease of the manga with the same name, Catulus Syndrome. It's a disease of unknown origins that causes a humans' body to change to that of a cat, displaying cat ears and tail, and even the ability to turn into a cat. It's symptoms first appear on girls between the ages of 0 and 12, and can even be contracted before birth (congenital catulus). It is implied that girls with the syndrome are more prone to falling in love with other girls.