Her Royal Highness(长公主在上)

Grand Princess Li Yun Zhen is rumored to live a decadent lifestyle with many bodyguards serving as her male concubines. She is uncharitable and merciless. She also holds the real political power in court. The Emperor sends Gu Xuan Qing undercover in the Princess' manor as a royal guard to gather evidence of her corruption and topple her regime, but the more he learns of the real princess, the less she fits the rumor, and he starts to fall for her.