This one is the Adorable Japanese Playing Cards. We can see there is a dog in the cards. It should be a short story of a cute dog. We can see in each cards, the footprint of the dog will change with the change of numbers.
"I've always thought that animals are the purest spirits in the world. They don't fake or hide their feelings, and they are the most loyal creatures on Earth. And yet somehow we humans think we are smarter. What a joke!" Quote by the wonderful Pink
It came to me that every time I lose a dog they take a piece of my heart with them, and every new dog who comes into my life gifts me with a piece of their heart. ♥ If I live long enough all the components of my heart will be DOG.