The boy's grandfather is a fish researcher. He makes a small gift for his grandson who has nightmares.
On my grandfather's birthday, I came to visit my grandfather's house. My grandfather was a great sea creature researcher and lived in a house where you could go underground and go into the sea.
His house was decorated with fish, and it took a lot of time and effort to visit because it was on top of a hill in an uninhabited village. So I didn't see my grandfather often, and I always missed him.

We saw giant squids and small sea turtles passing by.Surprised by the gigantic squid, I watched for a while.The giant squid swims in the sea and disappears from our sight.