It's not clear why the third season hasn't been released yet because this novel is a very popular work. Its copyright may still be in the hands of the animation production company or the author, so we don't know if there will be a third season. In addition, the production of a complete animation required many processes, including the concept of the plot, character setting, animation production, dubbing, soundtracks, and so on. It required a lot of time and effort. Therefore, whether there would be a third season still needed to wait for the official announcement and confirmation. As for whether the second season included all the plots in the novel, it was necessary to distinguish between the plot of the novel and the plot of the animation. The plot of the novel was more complicated, with many branches and details, so the second season might not completely cover all the plots in the novel. In addition, the narrative style and presentation of the novel and animation were also different, which might affect the understanding and presentation of the story. Therefore, he needed to look at the plot and the way the story was expressed in the novel and animation to determine if it contained all the plot in the novel.