Children Who Chase Lost Voices

Asuna Watase is a schoolgirl who lives with her mother and spends her spare time listening to strange music from a crystal radio left by her late father. After a monster attacks her on the way home, a mysterious boy named Shun comes to her rescue, but soon disappears. Asuna turns to her teacher, Ryuji Morisaki, who tells her about Agartha, an ancient land connected to the boundary between life and death. Together they set out to find it and bring Shun back into her life.