The contents of these two novels, XXX and Summer, are very similar, and they both tell the story of youth growth in the summer season. There are also many similarities between the characters and plot development in the two novels, which makes people feel as if they are the same novel.

This may be because the authors of the two novels were inspired by the same idea, or adopted similar story ideas, thus producing novels with similar contents. Although the two novels are similar, they also have their own characteristics and charms, which are worth reading.