The Underground Secret Document

 The Underground Secret Document (地底の秘密文書, Chitei no Himitsu Bunsho) is the seventh episode of The Familiar of Zero: Knight of the Twin Moons anime series.

Summary
Henrietta is convinced to sign a declaration of war against Albion. News of a victorious battle for the Tristain and Germania allied forces reaches a town that Louise and Saito are currently in. Saito discovers a sailor uniform on sale at a clothes merchants shop, but buys it for Siesta instead of Louise. At the academy, Louise and Saito join Agnès Chevalier de Milan and Julio as they explore a secret archive hidden beneath the school, to which Agnes was denied permission. Agnes wishes to obtain information that concerns the burning of her hometown of D'Angleterre. Eleonore is picked to open the lock to the entrance. As Mr. Colbert and the group heads farther down, they are joined by Siesta, who wears the sailor uniform Saito gave her earlier. After discovering that Saito gave the sailor uniform to Siesta because Louise lacked the chest size to make it look good, Louise blows a part of the cave in the way they came. With little to do but move further, the group finds the archives and sent to look for the records. When Siesta trips and makes a mess of the books, Eléonore returns them to their proper place with magic, which triggers the archives' security system and begins to bring the bookshelves to a close. Agnes finally finds the information, but a part of the page that lists the person who led the attack is missing. The group narrowly escapes the collapsing of the bridge that led them to the archives. Upon realizing that Louise had blocked their way out, Julio grants Saito permission to have intimate moments with Siesta. Siesta is happy to oblige and Saito also thinks its a good idea; however, Louise watches and prepares to blow something else up. When Saito points out that the cave which she blew up earlier is in the opposite direction, Louise tells him to shut up and blows them up.

Characters

 * Henrietta de Tristain
 * Louise de la Vallière
 * Saito Hiraga
 * Siesta
 * Agnès Chevalier de Milan
 * Julio Chesaré
 * Eléonore de la Vallière
 * Jean Colbert

Spells

 * Explosion

Locations

 * Tristain Academy of Magic