I'm not sure who Nikki Yovino is just based on this title. She could be the author of the story, in which case she might be a writer or storyteller. She might be writing from her own experiences or from her imagination.
Since I don't have details about ian and nikki's love story, here's a possible version. They could have been friends first. As time passed, ian might have noticed Nikki in a different light. He started to feel butterflies in his stomach whenever she was around. Nikki, on the other hand, also realized her special feelings for ian. And so their love story began, filled with little moments of joy, like holding hands under the moonlight and sharing warm hugs on cold days.
Well, in the 'love nikki ghost gathering story', it might center around a gathering of characters in the Love Nikki world. This gathering could be disrupted or influenced by the presence of ghosts. The story could explore how the characters react to these ghosts. Are they scared? Do they try to communicate with the ghosts? It could also be a story about the origin of these ghosts. Maybe they are the spirits of past players or something related to the history of the Love Nikki world. There could be a quest to find out the truth behind the ghosts and the gathering, and along the way, the characters might learn more about themselves and the world they live in.
It's hard to say for sure. Some of the stories might be based on real events, but they could also be exaggerated or fictionalized for entertainment purposes.