Perhaps they go on a family trip. During the trip, Pan might see something amazing like a rare animal or a beautiful waterfall. She'd run to tell Gohan and Videl, and they'd all share in the joy of the discovery. They could also have conversations around the campfire at night, with Pan asking about their past adventures and Gohan and Videl happily sharing their stories.
In fanfiction, when Gohan and Videl meet Pan, it could be a really heartwarming moment. Maybe they go on a family picnic and share stories. Pan might show off her new ki powers she's been working on, and Gohan and Videl would be proud parents, smiling and giving her advice on how to control it better.
Another plotline might involve a slow - burn relationship. They could be friends for a long time, and as their bond deepens, there could be a scene where Videl finally decides to take the step and kisses Gohan. This could be after a series of events that make her realize her true feelings for him, like seeing him in danger and realizing how much he means to her.
One possible interaction is that Bardock could spar with Goku and Gohan. He'd test their limits and see how much they've learned about fighting. Another could be Bardock sharing stories of Planet Vegeta with them, which would be really interesting for Goku and Gohan to hear.
Their relationship can be developed by having them face challenges together. For example, when dealing with the monster, they have to rely on each other's strengths. Gohan's power and Videl's intelligence can complement each other. They can also have heart - to - heart conversations during their battles or while preparing for them, which deepens their bond.
The relationship can be developed through trust. For example, when Gohan is in his Oozaru form, Videl can show that she trusts him not to harm her. This can be a start to a deeper connection.
A possible plot twist could be that Videl turns out to have some hidden powers herself. It would completely change the dynamic between her and Gohan.
This idea is quite out - there in fanfiction. One way it could work is if there are some powerful deities or beings in both universes who decide to manipulate the fates of characters. They could use their powers to transplant Naruto's essence into a new world where Gohan and Videl exist and make them his parents. However, this would completely change Naruto's origin story and his character development would have to be re - imagined in the context of the Dragon Ball world, which has very different power systems and cultures compared to Naruto's world.
A plot twist might be that Videl is actually related to one of Gohan's enemies in some way. This would create a huge conflict between them. Also, it could be that there is a prophecy about Gohan and Videl that they are not aware of, and when they find out, it completely changes their relationship. Maybe Gohan loses his powers temporarily, and Videl has to protect him, which is a role reversal from what is expected in the DBZ world.
One possible reason could be a miscommunication. In fanfiction, it's easy to create scenarios where Gohan misinterprets Videl's actions or words. For example, if Videl is trying to help Gohan in a certain situation but her approach is misread by Gohan as being pushy or controlling.
In this fanfiction, it could be set in a time when Gohan is off at university and Videl is still in their hometown. They both feel lonely in their different situations. Videl misses Gohan's presence, and Gohan feels out of place among regular humans at university. They communicate through letters or occasional phone calls, and their longing for each other grows. When Gohan finally comes back for a visit, they realize how much they mean to each other and start a relationship that is based on their shared experiences and the loneliness they've endured apart.