The gleaming spotlights The bright, fluffy, and adorable costumes. The lovely vocals while dancing and smiling brightly. These are the mermaid idols that swim and dance freely underwater under the bright lights of the large city stage. However, the sisters used to live in the calm town of Parrel, which was located far from the bustling capital of Paris. These girls, who would never dream of such a brilliant future for themselves, are instead making a scene about the snack cakes they are consuming. This is the narrative of the happy daily lives of mermaids who work hard every day.