Butler Harem Gakuen was an anime, and the novel was based on the original anime. Therefore, if one wanted to continue reading the novel after watching the anime, they had to arrange the reading order according to the progress of the anime version. Generally speaking, the ending of the animation usually appears in the first few volumes of the novel. Therefore, if you want to know whether the plot in the animation is consistent with the novel, it is best to read the first few volumes of the novel to better understand the development and ending of the story. Of course, they could also arrange the reading order according to their own interests and preferences to find their favorite plot and characters. No matter what order you choose, I hope you can find pleasure in reading.