"Children who Chase Lost Voices from Deep Below" is a manga adaptation of the 2011 animated film of the same name, written and illustrated by Makoto Shinkai. The story centers on Asuna Watase, a young girl living in a rural town, who spends her days exploring the nearby mountains and listening to a mysterious crystal radio she inherited from her late father. One day, while in the mountains, she encounters a strange creature that attacks her but is saved by a boy named Shun, who wields a peculiar crystal shard. Shun reveals that he is from Agartha, a mythical underground world, and shares fragments of its lore with Asuna before disappearing.

Asuna’s life takes a dramatic turn when her teacher, Mr. Morisaki, begins to show an unusual interest in Agartha. After Shun’s sudden death, Asuna meets his younger brother, Shin, who bears a striking resemblance to Shun. Together with Mr. Morisaki, they embark on a journey to Agartha, driven by their own motivations: Asuna seeks answers about Shun and the mysteries of the underground world, while Mr. Morisaki is determined to resurrect his deceased wife. Along the way, they encounter the Quetzal Coatl, guardians of Agartha, and navigate the dangers of the subterranean realm, which is filled with ancient ruins, mythical creatures, and remnants of a forgotten civilization.

The narrative explores themes of loss, grief, and the human desire to reconnect with the past. Asuna’s journey becomes a poignant exploration of acceptance and the inevitability of death, as she learns that Agartha, while a place of wonder, is also a realm where the living and the dead are inextricably linked. The story delves into the consequences of tampering with the natural order, as Mr. Morisaki’s obsession with resurrection leads to unforeseen and tragic outcomes. The manga retains the emotional depth and visual storytelling of the original film, presenting a tale that intertwines personal struggles with the allure of a mythical world.