Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish...

It is the middle of the 18th century. Beginning with the English, the Western European countries have begun to cast their gaze across the sea in an age of great romance. In such an age lives a boy who hides ...

During the time when the world is full of barren lands and big ships sail out to the vast oceans, a very rare type of sub-human--mermaid--was born. Normally, they have white hair, but only in water does the ...