Jiu Yan Chenghuan

Xie Yanhuan, disguised as Chen's Ninth Princess, was forced to marry Emperor Yan Gui as a surrogate. On the night of the wedding, Xie Yanhuan's true identity is revealed, all hope appears to be lost. Isn't Xie male? Yan is aware of this, but why doesn't Yan seem angry?
(Source: INKR)
Notes:
- Chapter count includes 4 extras
- Originally published under the title Zhuan Chong Guifei Shi Nanren (专宠贵妃是男人)