A great plot could be that Spencer gets into some trouble with her studies and her family's high expectations. Wren, being the older and more experienced one, offers to tutor her but in a very unorthodox way. As they spend more time together, they start to realize their feelings for each other are deeper than they thought. And this relationship development could be intertwined with the mystery and danger that always lurks in Rosewood in the Pretty Little Liars setting.
One common theme is forbidden love. Since there are so many secrets and complications in the show, this often translates into their relationship in fanfiction. Another theme is mystery, as both characters have their own secrets, and fanfic writers like to explore how these secrets affect their relationship.
A really interesting plot could be set in an alternate universe where Toby is a detective and Spencer is a journalist. They team up to investigate a series of strange disappearances in their town. As they dig deeper, they start to realize that there are forces at work that are much bigger than they initially thought. Their relationship evolves from professional partners to something more romantic as they face danger together.
One interesting plot idea could be that Spencer and Aria have to team up to solve a mystery that's related to their pasts in Rosewood. Maybe it has something to do with a long - forgotten event from their childhood that starts to resurface in strange ways. For example, they could start receiving anonymous letters that hint at a secret they buried long ago. Another idea is that they find out they have a hidden connection to one of the 'A' threats. They might discover that they unknowingly have some power or knowledge that 'A' wants, and they have to use their wits and friendship to outsmart 'A' and keep themselves and their friends safe.
One idea could be Spencer dealing with the shock of the pregnancy while trying to keep it a secret from her friends. She might be worried about how it will affect her academic future and her relationships within the group.
In fanfiction, Wren and Spencer often have a complex relationship. Sometimes, they are depicted as having a secret, passionate affair. Wren's mysterious nature adds an element of intrigue to their connection, while Spencer's intelligence makes their interactions intellectually stimulating.
One scenario could be that Hanna and Wren meet by chance outside of Rosewood. Wren is intrigued by Hanna's newfound confidence and Hanna is drawn to Wren's charm. They start to bond over their shared love for art, as Hanna has developed an interest in it after all she's been through in Rosewood.
Well, a great plot could be that Caleb finds a strange encrypted file on his computer that seems to lead to a hidden treasure in Rosewood. As he tries to decipher it, he has to team up with some unexpected characters from the show. Maybe he also has a vision or a strange dream that leads him to believe there's something supernatural going on in the town related to the file. Also, he could get into a situation where he has to choose between his loyalty to his friends and his own personal gain from the treasure.
A unique way to develop their relationship could be through a time - travel element. Imagine if they somehow got transported back to a key moment in Rosewood's history. They have to rely on each other to find their way back to the present while also learning more about each other's true selves. This would add an element of mystery and adventure to their relationship and make it stand out from the normal relationship development in the Pretty Little Liars story.
One interesting Spencer and Caleb fanfiction could be about them going on a secret adventure together. Maybe they discover a hidden part of Rosewood that holds a mystery related to their families. They could rely on each other's unique skills, Spencer's intelligence and Caleb's tech - savvy, to unravel the secrets.
A possible plotline is that Toby and Spencer get married in a secret ceremony. But then they face challenges when the truth about their marriage gets out. The other Liars might have mixed reactions, some being happy for them while others worried about how this will affect the group dynamic and their safety from the ever - lurking A.