Children who Chase Lost Voices from Deep Below (2011)

In a quiet mountain village, the girl Asuna Fernase (dubbed by Kanemoto Hisako) often stands on the top of the mountain, using the mysterious ore left by her father as a diode to listen to the beautiful music from the outside world. On the way home from school, Asuna was attacked by a monster. At a critical moment, she was killed by a handsome young boy named Shun...