Piyoko is the princess of Planet Analogue and leader of the evil Black Gema Gema Gang. But she's a poor royal figure, with little food to eat.

When Piyoko's Upchuck Bazooka destroys a whole city, she's forced to flee the planet! With the help of her minions Rik, Ky, and Coo, they plot to kidnap the Princess Di Gi Charat, a.k.a. Dejiko!