At first, they are together in the same water tank, but the man take the pink one, put her in the box and load it on the track. The orange octopus think the pink one will be sold, and he chase the pink one. The orange octopus hinders the driver and tries to save her. The man tries to stop him, and his driving becomes dangerous. The man continue to stop him and also the orange octopus tries to save the pink octopus.
At last, the track falls to the ocean, and at that time two octopuses hang on an electric wire. However, the orange octopus is taken away by a bird. Then, the pink octopus tries to chase him. This is the climax of this story.
I think two octopuses' relationship is boyfriend and girlfriend. The thing they want to do is to be together and save each other. I think the pink octopus will save the orange octopus from a bird.