The film centers on Asuna, a young girl who spends her solitary days listening to the mysterious music emanating from the crystal radio she received from her late father as a memento. One day while walking home she is attacked by a fearsome monster and saved mysterious boy named Shun. However, Shun disappears and Asuna embarks on a journey of adventure to the land of Agartha with her teacher Mr. Morisaki to meet a Shun again. Through her journey she comes to know the cruelty and beauty of the world, as well as loss.
金元寿子
as Asuna Watase (voice)
井上和彦
as Ryuji Morisaki (voice)
入野自由
as Shin / Shun (voice)
日高里菜
as Mana (voice)
折笠富美子
as Asuna's Mother (voice)
島本須美
as Risa (voice)
竹内順子
as Mimi (voice)
伊藤かな恵
as Seri (voice)
大木民夫
as Old Man from Amaurot (voice)
金田アキ
as Student (voice)
洞内愛
as Student (voice)
堀籠沙耶
as Student (voice)
