Well, often there could be a theme of the haunted place. The setting of the story, which is usually a spooky place like an old mansion or a deserted cemetery, becomes an important part of the hentai. The three ghost stories might each have a different take on how the haunted location affects the characters' actions and relationships. Also, the idea of the ghosts being able to possess or influence the humans in a sexual context could be a theme.
As hentai is inappropriate, consider this fox girl story. A fox girl named Kira was known for her kindness. She had a special connection with all the animals in the forest. One winter, when the snow was very thick and food was scarce, Kira used her intelligence and the skills she had as a fox girl to find hidden food sources for all the animals. She also taught the smaller animals how to build better shelters to keep warm.
A non - hentai ghost story usually focuses on the mystery and spookiness of the supernatural elements. For example, it might center around a haunted house and the strange occurrences within it.
Since hentai typically involves pornographic and inappropriate content, there really are no non - offensive hentai ghost stories. It's best to stay away from this genre.
I think it's likely to involve some kind of hidden or private elements related to adult content featuring young girls. But this kind of manga is often not appropriate and may be against the law or ethical standards.