Asuna, küçükken yitirdiği babasından hatıra kalan radyodan, bir gün gizemli bir müzik duyar. Bunun sonrasında garip bir yaratıkla karşılaşır ve onu boynunda bir kristal taşıyan bir çocuk kurtarır. Adı Shun olan bu çocuk, Asuna'ya sıcak davrandığından dolayı Asuna'da ona ilgi duyar. Ancak bu ani tanışmanın ardından acı bir ayrılık yaşanır ve Asuna tekrar Shun'u görmek için efsanevi bir dünyaya yolculuk yapar.

Kayıp Seslerin Peşinde

Fifteen girls who went on an expedition to an uninhabited island are left behind because their ship sank. The girls' survival begins.

Fifteen Girl Island Diary

On a warm summer day, a boy heard the sound of bells ringing, as if in celebration, in the mountain near his home. Several years later in that same mountain, the mushishi Ginko stumbles upon a young girl in a mountain with branches and leaves growing out of her body. He later realises that she is the lord of that mountain but finds it strange that a human like her was chosen as the lord. He meets her older brother who has continued to search for her ever since she disappeared while accompanying him on a stormy day. The story is about Ginko’s peculiar journey amidst the occult to unravel the mystery behind the enigmatic girl called Kaya and the mountain that has become her home.