The setting is a land filled with green, the timeline seems to be in the near future. The characters have a similar appearance to a rabbit. One day other creatures came to this land and started the cause of pollution. Before all the plants died, the main character was able to save a branch from a tree. Day by day the pollution gets worse and soon enough the main character and the plant are starting to get affected by it. At the end, a jellyfish like creature came from the plant and saved several creatures from the pollution.
The theme of the story would be, pollution will eventually lead to extinction of all living things so we should protect our nature.