Furyu released two new Girlish Number Nintendo 3DS themes based on the TV Anime’s official main visual. You can buy them one by one from the Japan Nintendo eShop for 200 Yen (with tax) or in one package for 300 Yen (with tax).
Both of them comes normal wallpapers, sound effects and the short version theme song of the anime. In the gallery you can find the sample pictures.