A possible plotline could be that Goku and Bulma's marriage leads to a new era of peace in the Dragon Ball universe. With Goku's strength and Bulma's intelligence, they could start initiatives to better the lives of all the races in the universe. They might also have children with unique powers that are a combination of Saiyan and human genetics, and the story could follow their growth and development.
One possible plotline could be a misunderstanding that leads to a rift between Bulma and Goku in their friendship. For example, Goku might accidentally break one of Bulma's important inventions, and she misinterprets it as him being careless on purpose. This could then lead to a series of events where they have to work through their differences and reconcile.
One possible plotline could be a time - travel scenario. Goku accidentally travels back in time to when Bulma was younger, and in a moment of confusion or trying to blend in, he kisses her as part of the local customs in that time period. Another could be a parallel universe where their relationship dynamics are completely different, and a kiss is a normal part of their friendship - like banter.
In such fanfiction, it could lead to a completely different power dynamic and relationship among the characters.
One common plotline is the 'friends - to - lovers' arc. They start as friends, sharing adventures, and gradually feelings develop. Another could be a 'what - if' scenario where Bulma realizes her feelings for Goku after he saves her life in a particularly dangerous situation. And sometimes, there's a plotline where they are forced to work closely together on a project or mission, and that closeness sparks love.
One interesting plot could be Goku and Bulma navigating the challenges of combining their very different lifestyles. Goku, being a Saiyan warrior, is used to constant training and battles, while Bulma is more into technology and inventing. In the fanfiction, they might struggle to find common ground in raising their family. For example, Goku might want to train their children in martial arts from a very young age, but Bulma could be more concerned about their academic education and safety. Another plot could be them facing threats from enemies who target their relationship. Maybe an old foe of Goku sees his marriage to Bulma as a weakness and tries to use it against him.
One interesting plotline is when Bulma's inventions are used to enhance Goku and Vegeta's powers in unique ways. For example, she might create a device that helps them control their ki better. Another is when Goku and Vegeta have to work together to protect Bulma from a new and powerful enemy. It shows their growth as characters who can put aside their differences for someone important to them.
One common theme is the adjustment to married life. Given Goku's naivete in some aspects and Bulma's strong - willed nature, their learning to live together is often explored. Another theme could be how their relationship changes the dynamics with other characters in the Dragon Ball world.
There are fanfictions where Bulma and Goku are sent back in time accidentally. In this scenario, they have to figure out how to get back to their own time while also dealing with the primitive conditions of the past. It could involve Goku having to hold back his power so as not to disrupt the timeline too much, and Bulma using her wits to survive. This type of story often has a lot of character development as they face challenges they've never had to before.
It could have led to all sorts of interesting plot twists. Maybe they would have had powerful kids or faced unique challenges together.
It would definitely change the dynamics of the story. Maybe their relationship would bring new challenges and opportunities for the characters.