People write it because they love the relationship between Beckett and Castle. It gives them a chance to explore different scenarios that might not have been shown in the original series.
One popular story could be 'A New Beginning' where Beckett and Castle face a new mystery together that also deepens their relationship in a unique way. Another might be 'Unspoken Feelings' which delves into the unexpressed emotions between them.
One possible scenario could be a really emotional moment where Castle finally gathers the courage to express his deep feelings for Beckett through his fanfiction. Maybe he uses the stories he writes as a way to convey his love in a more creative and less intimidating way.
Esposito and Ryan are very likely to be involved. They are Castle's friends and colleagues, and they would probably be there to support the couple. They might offer their own brand of humor and help out in practical ways, like throwing a baby shower for Beckett and Castle. Also, Martha, Castle's mother, would surely be a central figure. She could offer her wisdom on pregnancy and child - rearing, and add some comical moments with her unique personality.
She might be initially surprised. After all, it's an unexpected way to declare love. But then she could be flattered that Castle has such strong feelings for her that he expresses them even in his fictional writing.
One possible fanfiction could be about Castle and Beckett finding out they are having a baby girl. It might start with Beckett suspecting she's pregnant and taking a test. Then Castle's over - the - top excitement when he finds out. They could start planning the nursery, with Castle having all these wild, creative ideas and Beckett trying to rein him in a bit. Their friends would also be super excited, and there could be some comical moments as they all offer their parenting advice.
One possible fanfiction could be about Castle and Beckett raising their baby boy. Maybe it focuses on how Castle's over - the - top ideas for the baby's nursery clash with Beckett's more practical approach. For example, Castle wants a spaceship - themed room while Beckett just wants something simple and calming. The baby boy could also have some unique traits that add to the story, like having a very early interest in detective work just by observing his parents.
In this kind of fanfiction scenario, the story could be filled with intense emotions. Castle and Beckett would surely be devastated. They would immediately start using their detective skills and connections to search for their child. They might start by retracing their steps, thinking about any enemies they've made during their investigations. Maybe they'd discover a clue in an unexpected place, like a toy left at the scene that has some hidden message or marking on it.
In many Castle and Beckett first kiss fanfictions, the moment is often filled with pent - up emotions. Writers usually build up to it by showing the growing relationship between Castle and Beckett. It could be after a dangerous case, when they realize how much they mean to each other. The first kiss might be hesitant at first, like a gentle exploration of their newfound feelings.
One great fanfiction could be one where Beckett discovers Castle's pregnancy and they navigate the challenges together. It might explore how their relationship changes as they prepare for a new addition to their family.