Battleship Girl (5) Natsumi wo Sagase!

is the fifth volume of the Battleship Girl light novel series, written by Tsumugu Hashimoto and Illustrated by Yasuyuki Syuri. It was released under the Dengeki Bunko Imprint in May 2001.

Synopsis
After losing Natsumi in the battle of the Riruka star region, Yutaro and his crew were returned to the federal territory of Ganimete. The federal response was unexpectedly modest and each crew member was given a new assignment. However, Yutaro cannot recover from his disappointment and suffers. What appeared before him was Princess Atui of the Kingdom of Riruka. She proposes to use her special powers to restore Natsumi to her original form. On the other hand, Muramatsu and Hikari were looking for a way to gather friends and rescue Natsumi. Finally, the Natsumi rescue operation has started ... !! What is Natsumi's fate !? The fifth SF comedy presented by the winner of the 4th Dengeki Novel Grand Prize "Gold Award", Tsumugu Hashimoto.

(source: Amazon JP - Translated)