The Apothecary Diaries, Volume 5 (by Natsu Hyuuga)

Forced to the leave the Inner Palace, Maomao finds herself in the employ of none other than Jinshi, the seemingly ever-present thorn in her side! Immune to his charms, Maomao sets about learning the ways of life in the Outer Palace, where government officials and military officers go about the daily business of running the country. Far from being fearful of her new surroundings, however, Maomao has her insatiable curiosity piqued by the soldier-occupied eastern wing, where she's been forbidden to go but where it seems further mysteries await.