I'm not entirely sure as I haven't read it myself. But generally, light novels often revolve around a central character's journey, so perhaps it's about a character who has no choice but to become a monster for some reason, like to protect someone or achieve a certain goal.
Searching on specialized light novel websites could be a good idea. Some popular ones might have it available for purchase or even free in some cases. However, make sure the website is legal and reliable. Another option is to check with light novel fan communities. They often share information about where to find rare or less - known titles.
In Journey to the West, the black bear monster did not appear in the complete story. It appeared in the chapter "The Return of the Great Sage of Journey to the West".
Shi Kuan and the princess of the Monster Resisting Kingdom were in the North Mountain Demon Emperor chapter of the Fox Demon Little Matchmaker.
While waiting for the TV series, you can also click on the link below to read the original work of " Little Fox Demon Matchmaker " to understand the plot in advance!
Having chapter titles can be beneficial. It gives readers a quick preview of what to expect and makes it easier for them to reference specific parts. However, it can also be a bit restrictive if you struggle to come up with catchy titles.