Di Gi Charat Theater: Piyoko Is Number One! Book

Piyoko is number one! ...at least in this second installment of Di Gi Charat Theater - Piyoko is Number One! Piyoko and the Black Gema Gema Gang take over. This is your chance to look into the (poor) lives of Piyoko, Rik, Ky, and Coo. But Dejiko won't give up the lead role that easily. She will be making appearances occasionally (so watch out)!
The Black Gema Gema Gang are from Planet Analogue, and due to their poor resources they have been trying to conquer planet Di Gi Charat for years. Upon learning that that Princess Di Gi Charat (Dejiko) went to Earth, they quickly follow to kidnap her and hold her for ransom to support their home planet.
Piyoko is the head of the Black Gema Gema Gang, and Rik, Ky, and Coo work under her loyally and lovingly. However, Piyoko's plans always seem to backfire, and the goal of a prosperous planet is far away...