In this episode, the series' protagonist, Louise Françoise Le Blanc de La Vallière, is manipulated into a wedding ceremony that serves as a front for a political and magical trap.
Louise's childhood friend and self-proclaimed fiancé, Wardes, tricks her into traveling to the floating continent of Albion. He leads her to believe that her familiar, Saito Hiraga, has abandoned her and returned home.
This episode is commonly watched in English-dubbed formats, where the romantic tension and eventual rescue by Saito are pivotal moments for their relationship development.
The reference to most likely refers to the 11th episode of the first season of the anime series The Familiar of Zero ( Zero no Tsukaima ). Episode Summary: "Louise's Marriage"
In the context of "paper," this may refer to the important letter from Prince Wales that Wardes steals at the end of the episode. Alternatively, if you are looking for a physical paper craft, there are "Louise-Carmen" inspired journal tutorials and pop-up wedding card guides available online. Floral Wedding Day Card With Pop Up