- The protagonist was born a fox with only a stub for a tail, and later learned they were a Gumiho, a creature that is part fox and part human. - They had 5 siblings and learned survival skills from their mother, becoming the smartest and most skilled. On a full moon, they awoke with a tail growing in, gaining their first tail for mastering fox skills. - Gumihos must earn 9 tails total through difficult lessons and experiences on each full moon.