Kusuriya No Hitorigoto

From Square Enix: Maomao, a young woman trained in the art of herbal medicine, is forced to work as a lowly servant in the inner palace. Though she yearns for life outside its perfumed halls, she doesn’t long for a life of drudgery. Using her wits to break a “curse” afflicting the imperial heirs, Maomao attracts the attention of the handsome eunuch Jinshi and is promoted to attendant food taster. But Jinshi has other plans for the erstwhile apothecary, and soon Maomao is back to brewing potions and solving mysteries