The plot follows Mimiko, a bright little girl left alone when her grandmother leaves on a trip. Making a few stops at some local stores, Mimiko comes home to her house in a bamboo grove and finds a baby panda named Panny sleeping on the back doorstep. She quickly makes friends with the little panda, and invites him in for a drink. His father, PapaPanda, soon comes to visit, and they decide to become a family after PapaPanda offers to.

The family consisting of two pandas and one girl lives happily when suddenly a little tiger appears at their home. It arrives that the circus had come to their town. All of a sudden starts the pouring rain but it can't stop them.