The main characters of this story is a couple of octopuses and a man.
I think the octopuses are a pair of lovers because they were hugging each other at the first scene.
The man is probably working at a market or something. He grabs the pink octopus and separates the couple. The orange octopus notices that she's going to be in danger and rushes out from the water tank to help her. The two octopuses had a fierce fight with the man but ended up in victory.
It seemed to be a happy ending but another tragedy happened soon after that. This time, the orange one was taken away by a seagull. The story ends with the scene of the pink octopus trying to get her boyfriend back. I think the pink octopus can save her partner and maybe the seagull might fall into the sea like the man.
I think the hope of the couple is to live happily together forever, and I'm pretty sure that it would come true because they love each other so strongly, no one can separate them.