"Huh!? I have to be big brother's maid!? That's seriously unbelievable...!" For one week while their parents are away, a sassy little sister becomes her brother's personal maid! Despite complaining about the overly erotic maid outfit, she gets incredibly excited by their forbidden physical relationship! The once sassy little sister gradually transforms into an obedient, erotic maid! "Only 3 centimeters, okay!" "Fine, I guess... you can cum inside me..."