Katie's sickness in fanfiction can also be used as a way to show the family - like bond between her and the Big Time Rush boys. If she's sick, they might act like overprotective brothers. They'll hover around her, make sure she's warm, and tell her stories to keep her entertained while she recovers.
In some fanfictions, Logan's sister is an artist in her own right. She could be into painting or writing, and this could intersect with Logan's life in Big Time Rush. Maybe she uses her art to tell the story of Big Time Rush from an outsider's perspective, which could be really interesting. Or perhaps she gets inspired by the music and energy of Big Time Rush to create her best works, and Logan is there to support her as well, creating a symbiotic relationship between their two worlds in the fanfiction.
Writers develop their relationship by putting them in challenging situations. For instance, if they get stuck in an elevator together. During that time, they have to communicate and rely on each other, which deepens their connection. They could also start to develop feelings when they work together on a project for the band, like designing new merchandise. As they collaborate, they learn about each other's creativity and personalities, leading to a closer relationship.
In some fanfictions, they meet through mutual friends. For instance, one of Katie's friends is dating one of the other members of Big Time Rush, and they all end up hanging out together. That's when Katie and Logan first cross paths.
Some Tumblr blogs might also be a good source. There are many fans who post their own fanfiction on Tumblr, or they might reblog interesting stories about James and Katie. You can search for relevant tags like #BigTimeRush #JamesAndKatie #Fanfiction to find the content you're looking for.
There might be a fanfiction where James is teaching Katie how to play music. This would give them a chance to spend a lot of time together, and as they practice, they start to realize their feelings for each other are more than just friendship. They could have cute moments like when Katie finally plays a song correctly and James gives her a big hug.
One popular plot is Katie trying to help James with his songwriting in secret. She has a natural talent for it but doesn't want the other guys in Big Time Rush to know she's involved. Another plot could be a misunderstanding where James thinks Katie is interested in one of his bandmates, leading to some comical jealousy situations. There's also the idea of them going on an adventure together, like getting lost in a new city during a tour and having to rely on each other to find their way back.
Another idea for a fanfiction could be that Katie and James are transported to a magical music world. In this world, they have to use their musical talents to solve various challenges and find their way back home. Along the way, they learn more about each other's dreams and fears, and their friendship deepens.
In some fanfictions, when Katie gets sick, the boys of Big Time Rush might take turns looking after her. They could bring her soup and make sure she takes her medicine. It's a sweet way to show their friendship with Katie.
Some social media groups dedicated to Big Time Rush fans might also share or recommend 'Katie and James' fanfictions. For example, on Facebook or Reddit, there could be groups where fans discuss and exchange their favorite fan - created stories. Just search for Big Time Rush fan groups and look for any mentions of fanfiction related to Katie and James.
One popular storyline is where Katie has to pretend to be Logan's girlfriend for a publicity stunt. This leads to a lot of funny moments as they navigate through fake dates and public appearances. They start to develop real feelings for each other during this process.