Well, to determine if JL 50 is a real story, we need to look at its source, the details presented, and any available background information. But as of now, with just the name, it's impossible to tell.
Raya is purely fictional. It's made up to take us on an imaginative adventure in a fantasy world. The characters and events are not based on real-life occurrences.
Again, without knowing the details of the 'Raya real story', it's hard to say. But generally, a real story can be significant in many ways. It could inspire others, teach important lessons, or preserve a particular culture or tradition if it's related to that.