One day, a suddenly appeared in the garden. It wags its tail like a dog, but it’s a mushroom? It draws on places it shouldn't, and it always wants to eat all the takoyaki it loves. It might seem like a carefree child, but it subtly provides adult-level support. It’s full of mysteries, but spending time with it is somehow fun and laugh-inducing. This is a slightly mysterious and heartwarming animation depicting daily life with the mushroom dog.