Clumsy maid-in-training with large breasts who finds a way to trip over something, anything, in every episode she appears in.
Sanae fits yet another ecchi stereotype, the complete and utter clutz that usually trips over something and ends up smothering the male lead under either her breasts or ass.
Her sister, Saori, was able to get in to the upper ed class before the family's fortune defaulted. So, to stay close to her sister Sanae enrolled as a maid. Despite the numerous times that Sanae causes insane problems for all around her, everyone finds it impossible to hate her because she does mean well, she is just completely incompetent.
She does however, cause some of the more humorous moments of the entire anime, and none of them actually involve her smothering Akiharu. One in particular that comes to mind is one time when Sanae is carrying a tray with to plates of chocolate cake on it. Predictably, Sanae trips and sends the plates flying. One lands on Tomomi's chest and splatters across her outfit, the hilarious part is what happens to the other platter. That plate lands on Selnia's chest and nestles perfectly between the blond's larger breasts, not splattering at all, rather, sitting in perfect condition.