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.
Shinobi Masters?
Die Shinobi Masters …
¿Shinovi Master?
¿Shinovi Master?
Les Ninja Masters…
Shinobi Masters?
Mestres ninjas?
«Мастера синови»?