I'm not sure. It depends on how you define 'real'. Maybe it's based on some real elements or inspired by real events, but it could also be purely fictional.
Longlegs story? Well, Longlegs was a curious little thing. It had long, spindly legs that made it look a bit odd but also very endearing. Longlegs loved to play hide - and - seek with the other meadow animals. Its long legs helped it to hide behind the thinnest of bushes. The other animals always had a hard time finding it. It was a friendly creature and would often share the best hiding spots with its friends.
The 'longlegs origin story' could refer to the origin of a character named Longlegs. It might be about how this character came into existence, perhaps in a fictional universe, a game, or a story. Maybe it's a unique creature with long legs and its origin involves some magical or scientific elements.
If 'longlegs' is about daddy longlegs (also known as harvestmen), their real story is quite interesting. They are arachnids but not true spiders. They have long, spindly legs which help them move around in various terrains, from grasslands to forests. They are mainly scavengers, feeding on small insects, dead plant matter, and other debris. They use their long legs not only for locomotion but also to sense their environment.