Imouto wa Namaiki Kasshoku Maid-san.

"She’s supposed to be a healing maid, but behind the scenes, she’s got quite the attitude!" A single flower blooming in a struggling (?) café. A maid with a sunny smile, a warm demeanor, and a tan line that catches the eye. But her true nature… is that of a cheeky, bratty girl. [Translated from dlsite]