I don't know what 'waiting for a person's coffee' means because it's not a common word or phrase. If I can provide more context, I might be able to help you answer your question better.
Light novels are a genre of literature in the Japanese light novel industry. It is mainly featured by lightness, humor, and romance, and is usually targeted at young readers. Although the writing techniques and plots of light novels were often more diverse, there were often elements like love, adventure, fantasy, and so on. Thus, there was a certain difference between light novels and small novels. Although some light novels have simple plots, they often contain profound topics and thoughts, exploring the growth of young people, interpersonal relationships, self-awareness and other issues. Therefore, light novels were not the same as white novels.
I'm not entirely sure as I haven't read or seen it specifically. But generally, a ghost story like this might be about a small hand which could be a sign of a ghostly presence. It might involve a mystery surrounding the origin of this small hand, perhaps in a spooky old house or an eerie location.
Indeed, it is. The show takes elements from actual history and presents them in a fictionalized format. The characters and situations have roots in reality, giving it an authentic feel.