Children Who Chase Lost Voices

A young man named Shin lives with his big brother Shun in an underground place named Agartha. One day, his brother left toward the surface with a cristal and Shin has to follow him and bring back the cristal to Agartha. During his journey, he will meet Asuna, a young girl who lives without her father and Morisaki, a man who has lost his wife.

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.