Dragon Party (1) Hoshizora ni Nobase Kibou no Te

is the first volume of the Dragon Party light novel series, written by Yuji Nakazato and Illustrated by Daisuke Tsujita. It was released under the Dengeki Bunko Imprint in May 2001.

Synopsis
The mysterious "enemy" that human beings have encountered in space ... I saw it, but at the end, humans lose their emotions and become faithful swordsmen of the "enemy". Therefore, human beings shut themselves up on the earth and entrusted the fight to autonomous robots. A high school student, Yu Minamikata, who was desperate after being refused a dream to help his younger sister who was left behind in a space colony when he was young, meets a robot girl, Mao. While being swayed by a free-spirited Mao, Yu is run over and finds out that Mao holds the key to launching the dragon-shaped giant mobile space weapon "Kairyu", the trump card of humankind. Yuji Nakazato's whole SF new series opens.

(source: Amazon JP - Translated)