I don't think it is. Usually, such titles suggest fictional or semi-fictional content rather than being based on real events. There might be elements inspired by real life, but it's not a pure true story.
The meaning of 'af' in romance novels can vary. Sometimes it's just a part of modern - day slang that has made its way into the writing. Writers might use it to make their characters seem more relatable and contemporary. It could also be an acronym that the author has created for their own purposes within the story. For example, it could stand for a fictional organization like 'Alliance of Fairies' or something similar. It really depends on the context of the specific romance novel.
Well, Dragon Ball AF comics often feature unique character developments and expanded universes. They may incorporate elements not seen in the original series to keep things fresh and exciting for fans. Also, the art style could differ, giving a new look to the familiar characters.
I'm not sure specifically which scary stories are in AF City Library. It could have classic horror tales like those by Edgar Allan Poe, or local urban legends that have been collected and stored there.
Since I'm not aware of the 'Rohi af' full story, it's impossible to determine its significance. However, generally, a story's significance can lie in the lessons it teaches, the emotions it evokes, or the cultural or historical context it represents. But without knowing the story of 'Rohi af', we can't be sure about its significance.