Harem novels were a series of struggles and adventures of women in the harem in order to survive in the apocalypse. In this type of novel, there would usually be multiple female protagonists who were trapped together after the apocalypse, fighting fiercely for their own goals and survival. These female leads might have all kinds of emotional entanglements and even cooperate with each other, but in the end, they would all lead to tragic endings for various reasons. Harem novels were very popular in online novels because this kind of story setting could attract a large number of readers. It could also show the struggle and power struggle between women to enhance the sense of immersion of readers. However, such novels were often controversial because they often had unreasonable plots and overly pessimistic endings.