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.
If you mean the sisters
Gekkou-san and Senkou-san.
Die Schwestern Gekkou und Senkou …
Si hablan de las hermanas
Gekkou-san y Senkou-san…
Son de las hermanas
Gekkou-san y Senkou-san…
Elles sont sœurs.
Se intendete le sorelle Gekkou-san e Senkou-san...
Se estão falando das irmãs
Gekkou-san e Senkou-san.
Если вы про сестёр Гекко и Сэнко.