Leave it to Piyoko! Move over, Di Gi Charat! Piyoko and the Black Gema Gema Gang star in this new OVA series. From the Planet Analogue to Earth, the Black Gema Gema Gang try to kidnap Dejiko and hold her ransom to find their dream of a prosperous home!

The glittering spotlights. The sparkling, fluffy, cute outfits. The charming voices while dancing with bright smiles. Under the dazzling lights on the big city stage, these would be the mermaid idols who swim and dance freely underwater. But far from this big city, the girls once lived in the peaceful village of Parrel. These girls, who would not even imagine such a glittering future for themselves, are instead just raising a fuss over the snack cakes they are eating. This is the story of the cheerful daily life of mermaids who strive their hardest everyday.

This is sweet and bitter love story of Dejiko who is a grown up. The story begins on the Christmas day. Dejiko or Di Gi Carat is working part-time at a bakery shop. On her way from the shop, she happens to meet a young guy, Senba Taokuo at a park. Then, she meets him again in a town. While Dejiko begins to care for Tako and she’s looking forward meet him again, Takuo drops in at her shop.... Whether will she succeed in love?