I Want to Change the Settings for the Male Protagonist

She wrote an imaginary novel, but only halfway through, she realized that she seemed to have passed through it... The first half of the plot looked very beautiful, talking about falling in love and getting married, but the key is that she just happened to write the biggest turning point. The ending of the heroine in her conception seemed not to be ordinary... Can anyone tell her how she can change the settings of the male protagonist? Waiting online, urgent!