This story is a crossover between VeggieTales' Pistachio: The Little Boy That Woodn't and Wonderful Precure.
The story takes place in a connected location between the Waterfront and Animal Town. The adventurous dog, Inukai Komugi, sets off on a journey with the sly and mature cat, Nekoyashiki Yuki, as humans. This causes some panic between their owners, Iroha and Mayu, and they set off to find their respective pets with a few others. During their adventure, Komugi and Yuki come across five golden coins and they decide to keep them, but after winding up at the edge of the Waterfront, who knows what's gonna happen next after finding a piece of shiny treasure?
(Disclaimer: What you're about to read is a book created after Cure Nyammy debuted and in the author's AU. Any continuity errors should just be accepted as part of an alternate universe.)