Dragon Party (6) Hoshi no Kanata no Berserker

is the sixth 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 February 2003.

Synopsis
"Tiamat", "Kairyu", and the show that betrayed the "enemy", the three Tiamat-class ships of "Tenryu" destroyed the "enemy" front base on Mars, and made Yu's sister the original of the show, the south. Rescue Sho. The earth that has temporarily regained peace. However, Yu and his friends knew that this peace was only a temporary illusion. "Kairyu" and "Tenryu" who left the earth to hit the main body of the "enemy" in the other side of the galaxy ... They met alien people fighting the "enemy" ... The sixth in the popular series.

(source: Amazon JP - Translated)