I recommend "Ode to the Morning Sun Palace: A Thousand Years of the Imperial Concubine", an ancient romance novel. The female protagonist accidentally saved the male protagonist. Later, the male protagonist returned again, but he destroyed the female protagonist's country with the flames of war. The female protagonist stabbed him with her sword. After the male protagonist was injured, she said,"I returned this sword to you. From now on, I don't owe you anymore…" There were many revenge plots in the story, but there were also emotional lines. I hope you will like my recommendation. Muah ~