Synopsis

Long ago, human civilization had lived on the ocean floor. However, there were many humans who wanted to live above the surface and they moved to land creating a fundamental separation between the two. After their school closed down, four 14-year old middle school students from the sea village, Shioshishio, had to attend Mihama Middle School on the surface. This is about their lives and how they adjust to a new environment and the relationships between the sea and surface people.