The Domineering Emperor's Fake Concubine

She was the princess of the former dynasty who lost her country, she was also his slave, his concubine, and the only person he loved from beginning to end, but he lost her... They have known each other since childhood, but they have not met each other again. They love each other so much, but they are also hurt so much that life is worse than death... He said: "In my whole life, I have only had feelings for Wan'er, and I will only love Wan'er." She asked: "Then how long will the emperor pamper me?" He answered: "Forever, forever."