The information you provided is not enough to generate a complete original novel. The story between Emperor Song and Mo Zhu needed other plots and characters to participate, such as the personalities, backgrounds, interactions, and so on. The following is a possible story outline for reference only: The story began when Emperor Song met Mo Zhu on his journey while he was resting in the human world. Mo Zhu was a mysterious woman. She seemed to know a lot of secrets about Emperor Song. With Mo Zhu's help, Emperor Song was able to stay in the human world for a longer period of time and interact with the local people. However, Mo Zhu's identity was not as simple as an ordinary woman. She was a ghost from the King of Hell, and Emperor Song was her lover. Due to certain reasons, Mo Zhu was unable to return to the King of Hell. She decided to stay on Earth to accompany Emperor Song. However, she had no intention of letting Belial forget her. Instead, she wanted him to help her complete her mission. During this process, Emperor Song gradually realized that Mo Zhu was not just a passerby in his life. She had a deeper meaning. However, he could not stop Mo Zhu from completing her mission. In the end, after Mo Zhu completed her mission, she had to return to Hell King's Palace. Before Mo Zhu left, Emperor Song finally remembered his feelings for Mo Zhu, but he knew that he could not continue living. He silently blessed Mo Zhu and left the human world. The other characters in this story also needed a corresponding plot and background to fully present the charm of a micro-novel. I hope this summary can give you some inspiration. If you have other needs, please let me know at any time.