Why Am I a Secret Guard?

Su Zhaozhao passed through a book of conspiracy and became the spy secret guard working for the villain Gu Shenyan. She has no name, only the number thirteen. Thirteen was rescued by Gu Shenyan since she was a child, and she admired Gu Shenyan to the point of being intoxicated. In order for Gu Shenyan to get the throne he dreamed of, she became the fake princess of the male protagonist Lu Muyun according to the arrangement of taking care of Shenyan. The male protagonist Lu Muyun was a good man in his previous life. As a prince, he was virtuous and loved the people, and was respected by the people, even more than his father. He trusted his dear brother Gu Shenyan and treated the princess who had a political marriage with courtesy. They had been married for three years and never exceeded the limit. Unexpectedly, what he got in the end was a sword piercing his heart. After reviving his life, Lu Muyun looked at the fake princess sitting in the wedding room in front of him with a gloomy expression. The salted fish secret guard in the book x the male protagonist who is reborn and takes revenge Intention: Live as long as you can