Looking for munwha

Please help! I forgot the title of a munwha that I want to re read and find if there’s update.

This one is about reincarnation of an orphan girl name Nina. She was sent to the be a maid for the emperor. She looks like the high priest and the emperor takes a liking to her. She a lot younger than the emperor and I’m not sure if there’s going to be a romance between the two. I do know that the people who sent her to the emperor hope she would spy on him and help the priestess escape. However, because she was reincarnated she didn’t want to do that knowing that she could be killed this way. This is what I remember from the plot so I could be wrong on some details but it’s basically this premise.