The Gessen girls infiltrate their middle school to get more info on Gekkou and Senkou.  This means cosplay, and outfits that are way too small.
Gessen
 Girls'
 Academy
 Newsletter
Notiziario
dell'Accademia
Femminile
Boletim de notícias
Escola Feminina Gessen
Вестник
академии
Гессэн