One possible plotline could be the miscommunications that occur during the fake divorce. For example, one character might think the other is actually falling for someone else while it's all part of the act. Another could be how they deal with family and friends who don't know it's fake. They might have to come up with elaborate lies to keep the charade going.
Well, in 'castle fake divorce fanfic', perhaps there's a plotline where the characters use the fake divorce as a way to solve a mystery. They might think that by separating publicly, they can get closer to a suspect who has some connection to their relationship. And then there could be the emotional turmoil they go through as they pretend not to care about each other in public but still have strong feelings in private.
In 'castle fake divorce fanfic', it's likely that the main characters are the two people whose relationship is at the center of the story. They might be characters with different personalities and occupations. For example, one could be a strong - willed lawyer and the other a laid - back artist. Their differences would play a big role in how the fake divorce unfolds.
One interesting 'castle fake girlfriend fanfic' story could be about how the two characters initially pretend to be in a relationship for a specific event, like a family reunion. But as time goes on, they start to develop real feelings. For example, during the reunion, they have to act all lovey - dovey and end up sharing some really personal stories that make them see each other in a new light.
One possible plotline could be Harry growing up in the Castle family and learning their unique traditions. Maybe he discovers a hidden talent or power that was dormant before. Another could be him forming new friendships within the Castle family's social circle.
It could also be a fanfic that takes place in an alternate universe. In this universe, the events of 4x23 didn't happen as they did in the show. Maybe Beckett didn't become a detective in the same way, and Castle meets her in a completely different situation. They then start to solve mysteries together in this new setting.
Well, in this kind of fanfiction, there could be a plot where Harry has some sort of mystery in his past that Castle helps him unravel. Maybe Harry has some hidden talents that Castle recognizes and helps him develop. It could also involve Harry making new friends in Castle's social circle, which leads to all sorts of adventures and personal growth for him.
One possible plotline could be that the baby has some sort of special ability or is in some way connected to a mystery they have to solve. Maybe the baby's birth coincides with a strange series of events in the city, and Castle and Beckett have to use their skills to protect the baby and figure out what's going on.
One possible plotline could be the public's reaction to the divorce. The media frenzy, public opinion polls swinging, and how it affects the political climate. Another could be the division of assets, especially if there are state - related properties or funds involved in some way. And perhaps the role of political parties in either trying to cover it up or use it to their advantage.
To write a good 'castle fake girlfriend fanfic', you need to focus on the relationship development. Start with their awkward first interactions as they pretend to be a couple. Then gradually show how they start to understand each other better. Add some conflict too, like one of them having real feelings while the other is still just in it for the pretense. Also, use vivid descriptions of their settings and emotions to draw the reader in.
One possible plotline could be that Sakura is in a difficult social situation, like in a school or a workplace where she feels pressured to always seem happy, so she puts on a fake smile. As the story progresses, she meets someone who sees through her facade and helps her open up.
One interesting 'Castle FBI fanfic' could be about Castle getting involved in a top - secret FBI case where his unique perspective as a mystery writer helps solve the case in unexpected ways. For example, he might notice details that the trained agents overlook.