Children Who Come from Deep Below

Asuna is a shy and diffident girl who lives in the mountain town of Mizunofuchi. One day, she meets Shun, a boy who claims to be from a mythical land known as Agartha. However, just as a bond is beginning to form between them, Shun vanishes. As Asuna wishes she could see him again, she encountersShin, another boy who looks just like Shun, and Morisaki, a teacher searching for Agartha. The three of them set out for the legendary country, each with their own goal in mind—and their own lessons to learn along the way.

The story centers on Asuna, a girl who spends her solitary days listening to the mysterious music emanating from the crystal radio she received from her father as a memento. However, she embarks on a journey of adventure to meet a boy again, and thus comes to know the cruelty and beauty of the world, as well as loss.