Duan Surk (7) Hyosetsu no Opal (Part 1)

is the seventh volume of the Duan Surk light novel series, written by Mishio Fukazawa and Illustrated by Tatakao Otoki. It was released under the Dengeki Bunko Imprint in November 2000.

Synopsis
When Duan woke up after a long night of battle at Silver Nezu Castle, the castle was filled with joy. While dressed in gorgeous costumes and treated like a hero, the celebration ceremony for the castle began. Everything is like a dream that I have never experienced. Both Duane and Orba were immersed in the heroic mood ... Friends who fought together-Duan is forced to choose as an adventurer by encountering magic warrior Clay Juda, assassin Land, Prince Charles, etc. !? In addition to Duan's new adventure "Ice and Snow Opal" Also includes "Assassin Killing", which depicts the adventures of Orba and Land!

(source: Bookwalker JP - Translated)