Now that she's 13 years old, it's for Kiki to learn how to become a witch. 
Now that she's 13 years old, it's time for young Kiki to start thinking about her future. So one night, under the shine of a full moon, she grabs her black cat Jiji, hops on her mother's broom and heads off into the night. The next day she alights upon a friendly oceanside city, and this, she tells her loyal and furry companion, is where she'll spend the next year learning how to become a real, honest-to-goodness witch. 
All the kids in the Aviation Club are excited to have a witch living in their hometown. Tombo, for one, won't rest until Kiki shows him how she flies through the air on her broom. Suddenly, little Kiki has become the most popular girl in Corico!