Perhaps a plot where Lydia and Beetlejuice accidentally swap personalities. This would lead to all sorts of comical and spooky situations. Beetlejuice in Lydia's body would have to deal with school and her family, while Lydia in Beetlejuice's body would have to handle the chaos of the Netherworld. They then have to find a way to switch back before it's too late.
A plot could involve Lydia inviting Beetlejuice to a human party as her plus - one. Beetlejuice has no idea how to act at a normal human gathering and causes all sorts of mayhem, from scaring the guests to turning the party food into strange and otherworldly delicacies. Meanwhile, Lydia has to keep him in check while also trying to show her friends that he's not as bad as he seems. Or perhaps there's a new ghostly threat in the afterlife that only Lydia and Beetlejuice can stop together. They have to put aside their differences and work as a team, which is difficult given Beetlejuice's self - centered nature.
In a fanfiction plot, Beetlejuice and Lydia might be forced to work together on a task to save their world. As they spend more time together, they start to understand each other better. There could be some misunderstandings along the way that they overcome. Eventually, when they succeed in their task, the joy and closeness they feel make them share a kiss. It could be a moment of celebration and also a realization of their deeper feelings for each other that have developed during their adventure.
One possible plot idea could be that Lydia is initially hesitant about the kiss. Maybe she's conflicted because Beetlejuice is from another world and she's not sure if she should get involved. But as the story progresses, she realizes there's a deeper connection between them that goes beyond the strange and spooky exterior of Beetlejuice. Another idea could be that the kiss is a result of a magical spell gone wrong. They end up kissing to break the spell that has put their world in jeopardy.
One possible plot could be that Beetlejuice kidnaps Lydia to force her to help him gain more power in the afterlife. Maybe he thinks her unique connection to the living and the dead makes her a valuable asset.
Perhaps in the fanfiction, Lydia is pregnant in a post - apocalyptic world. She has to find ways to protect herself and her unborn baby from various threats. This could involve teaming up with unexpected allies and facing difficult moral choices along the way.
There are quite a few. 'The Enigmatic Connection' is a fanfiction that stands out. It starts with Lydia being a bit more curious about Beetlejuice than she initially was. As the story progresses, we see their relationship evolving in unexpected ways. There's also 'Beetlejuice's Protective Side for Lydia' which shows how Beetlejuice, despite his wild nature, has a soft spot for Lydia. Another good one is 'Lydia's Influence on Beetlejuice's World'. It's really fascinating as it shows how Lydia, as a living being in a world full of the dead, can have a huge impact on Beetlejuice's life and the world around him.
One idea could be that the reader is a new resident in the haunted house where Beetlejuice lurks. They accidentally summon him while trying to fix up the old place. Another could be that the reader is a medium who can see Beetlejuice clearly and they form an unlikely friendship. Maybe the reader is a lost soul like Beetlejuice and they find common ground in their otherworldly existence.
Lydia would probably be very scared at first. After all, being kidnapped by a strange and unpredictable character like Beetlejuice is no joke.
One idea could be that they face challenges from their families who are initially not supportive of their relationship now that Lydia is pregnant. Another could be that they discover some sort of supernatural complication related to the pregnancy. For example, the baby might have special powers that start to manifest during the pregnancy and they have to figure out how to deal with it.
Maybe there's a mystery surrounding the pregnancy. Since they are in a world full of the supernatural, the baby could have some special powers even before birth. Some of the other characters like Scott and Stiles might suspect that there's something unusual about the pregnancy. They could try to investigate, which causes some tension between them and Lydia and Parrish, who just want to enjoy the pregnancy without all the scrutiny. But in the end, they all come together when they realize they need to protect the baby from some external supernatural threat.