The manga shows the boy exploring unknown realms as he fishes for dreams. It's full of surprises and magical elements.
I'm not sure specifically as I haven't read that exact story. It could be about a fish that is considered the most powerful or important among all the fishes, perhaps having special abilities or ruling over a certain underwater territory.
The 'king of fishes story' could have many interpretations. It might be a story passed down in a fishing community about a legendary fish that was once caught. This fish could have been so large or unique that it became known as the 'king of fishes'. It could also be a story told from the perspective of the fish themselves, perhaps about their society and how the 'king' rules over them, including things like how they divide food, territory, and deal with threats.
Maybe a story about a group of fishes trying to save their home from pollution. They face many challenges but don't give up.
It could be a story of kindness or maybe a budding romance. The girl might be helping the boy for a specific reason.
Perhaps it's a tale of his determination to maintain the quality of his fresh fish despite difficulties. It might show his adventures at sea, his interactions with fellow fishermen, and how he overcomes obstacles to make a successful living from fishing and selling.
It's likely to be full of adventure and mystery. Maybe the boy discovers special powers or faces challenges because of the devil's influence.
There are several possibilities for the main character in the 'king of fishes story'. It could be the king fish, which might be depicted as a powerful and majestic being. However, it could also be a fisherman who is on a quest to catch the king fish. Or perhaps it's a young fish who looks up to the king fish as a role model and wants to learn from it. There could even be a magical character involved if the story has elements of magic or fantasy, like a mermaid who has a connection with the king fish.
Without knowing the story, it's difficult to be certain. However, the king of the fishes must be a central character. There could be other characters such as a small fish that the king befriends and protects, showing the king's kind side. Or there might be a group of fishes that are jealous of the king's power and try to undermine him. There could also be a character like a seahorse that serves as a messenger in the underwater world of the story, connecting different fish characters.
The main characters are the three little fishes, of course.
It could be a tale of his struggle and growth, dealing with the challenges that come with the scar.