I'm not sure specifically what the 'friends of rachel story' is without more context. It could be about Rachel's group of friends, perhaps their adventures, relationships, or something that happened among them.
Yes, there are. Many fanfiction writers explore the deep bond between Rachel and Monica. For example, there could be stories where they support each other during tough times at work. Rachel might be having a hard time at her fashion job and Monica is there to cheer her up with her unique brand of tough love. These fanfictions often add new dimensions to their relationship.
Since I don't know the exact 'friends of rachel story', I can't say for sure. But it's likely Rachel herself is one of the main characters, and then her closest friends would be the others.
There could be a scenario where Rachel had a job - related issue during the Fourth of July. Maybe she had to work extra hours at Ralph Lauren and missed out on some of the fun with her friends. Or perhaps she met someone new at a Fourth of July event that led to some interesting interactions in later episodes. But this is all just guessing as the details are a bit hazy.
It's possible that Rachel's friends in Europe had a story centered around a particular event. Say, they all went to a music festival in Spain. There, they danced to the lively music, made new friends, and had a wild time exploring the local nightlife. And throughout their time in Europe, they created memories that would last a lifetime.
Friendship is a very common theme. Writers often explore how they support each other through different life stages. Another theme could be their shared living experiences, like the time they spent as roommates.
One great fanfiction could be where Santana and Rachel team up for a singing competition outside of Glee club. They start as rivals but slowly realize they have a lot in common and become best friends. In this fic, they might help each other overcome personal insecurities related to their singing careers.
A fanfiction might explore how Rachel's pregnant belly affects her relationship with Ross. They could have tender moments where Ross gently touches her belly and talks to the unborn baby. There could also be some tension as they discuss things like baby names and future living arrangements, all while Rachel's pregnant belly is a constant reminder of the big changes coming in their lives.