So, in this animation, there are two main characters, a male octopus and a female octopus, and they are a couple. they live in a water tank in fish shop.
I think the biggest theme of this story is the importance of making effort.
In the first scene, female octopus is taken away, and the male tries to take her back. then, eventually he gets her back, but after that, he is taken away next. and the female octopus tries to hit the bird who took the male. Although the story ends at that point, I guess they could get togather and escape to the sea.