One possible plotline is that the main character is a new student at school. They are not a big fan of One Direction, and the school is full of die - hard fans. These fans start to bully the character by excluding them from social activities, like lunch tables or parties. As the story progresses, the character tries to find ways to fit in without having to pretend to like One Direction.
Some fanfics focus on the emotional toll of being bullied by One Direction fans. The victim may experience depression, anxiety, or a loss of self - esteem. This can be due to constant taunting or being made to feel inferior. There could be themes of revenge as well, where the victim eventually stands up to the bullies. Or it could show the process of the victim finding their own support group that accepts them for who they are, regardless of their stance on One Direction.
First, you can try to communicate with your brother within the context of the fanfic. Maybe he has some misunderstandings that can be cleared up through honest conversation.
First, work on the characterization. Really study the members of One Direction, their mannerisms, speech patterns, and values. This way, you can ensure that they are in - character in your fanfic. For instance, Louis Tomlinson's sense of humor should be accurately reflected if he's a character in your story.
I'd recommend 'Dancing in the Moonlight'. It's a fanfic that focuses on a love story between a fan and one of the members. The descriptions of the settings and the emotions are so vivid. It makes you feel like you're right there in the story, experiencing everything along with the characters.
Poor grammar and spelling mistakes can also make a One Direction fanfic bad. It can be really distracting for the readers. When you're trying to get into a story about your favorite band, constantly coming across misspelled words or incorrect sentence structures pulls you out of the immersion.
Well, one possible plotline could be that the bully starts to show a softer side as they interact more due to the protagonist's love. Maybe they share a common love for One Direction which becomes a bonding point. For example, they could start by accidentally meeting at a One Direction concert or event related to the band.