C3 (C cubed) X

is the tenth volume of the C3 light novel series, written by Hazuki Minase and Illustrated by Sasorigatame. It was released under the Dengeki Bunko Imprint in September 2010.

Synopsis
It's been a while since Nizoi transferred to school, and the world is in Valentine's Day. Including Fear, who was fanned by Uzuna, each of them inflates the delusion of the desired chocolate handing situation !? At that time, the laboratory director, Mr. Himura, returns to school as a teacher. Moreover, he was accompanied by an unexpected person. Furthermore, the knights of the collection front knight territory stand in front of everyone. She manipulates strange phrases such as "Really Goodest!", But she was her strong enemy with the call of "the strongest"! Valentine's Day is also a difficult volume 10!

(source: Bookwalker JP - Translated)

Characters

 * Haruaki Yachi
 * Fear Kubrick
 * Konoha Muramasa
 * Kirika Ueno
 * Sovereignty
 * Shiraho Sakuramairi
 * Kuroe Ningyouhara