Kumori nochi Nine: Hakai Shoujo wa, Anata no Tame dake ni Namida Suru (Volume)

is the first volume of the Kumori nochi Nine: Hakai Shoujo wa, Anata no Tame dake ni Namida Suru light novel series, written by Minato Ishikawa and Illustrated by Tokichi. It was released under the Dengeki Bunko Imprint in October 2015.

Synopsis
A rugged mercenary Kyle and an innocent girl Nine. Under the polluted sky, the two meet. In a pollutant-covered world, mercenary Kyle met a girl floating in culture deep inside the ruins. She is a young mechanical girl who has no name and cannot understand words well. "You don't have a name. Do you understand?" "Nine? I am nine!" Nine with unknown fighting ability and Kyle who has been certified as her master for some reason. They decide to travel the world abandoned by humankind in search of Heaven's Gate, which is said to lead to paradise. Sometimes like a parent and child, and sometimes like a brother and sister. And at one point, like a lover. The relationship between the two changes during the journey. And what is the reason for Nine's tears that flows after finding hope for the future? This is a love story tied to the end of the world.

(source: Dengeki Bunko Official Website - Translated)