I'm not sure what the novel you mentioned is because you didn't provide enough information. However, it was common for the male protagonist to be a little lame in a teacher-student romance novel because it could enhance the tension and drama of the novel. As for the forced marriage with the female protagonist at the beginning, it might just be a plot setting in the novel to promote the development of the story. No matter what, it was important to ensure that the plot of the novel was true and credible, and that it complied with moral and legal provisions.