Chiisana Maid-san no Himitsu

Inside this mansion is a paradise of girls! All the young maids are at the age when they want to explore new things, and Aira is among the youngest. When her friend Sophie acts secretive, Aira follows her and catches Sophie "fooling around" with another maid! In exchange for keeping it a secret from the head maid, Aira asks Sophie to fool around with her, too... However, it seems kissing isn't enough to satisfy Aira... As they bare themselves from under their uniforms, they begin to touch one another, and soon Aira and Sophie are heading towards the heights of pleasure!

(Source: Renta!)