Maybe in the fanfiction, Gohan saves 18 from a dangerous situation. This act of heroism makes 18 see Gohan in a new light. They then start to bond over their shared experiences of being somewhat outcasts in society. Gohan is half - Saiyan in a mostly human world, and 18 is an android. Their relationship develops slowly as they learn to trust each other more and more, and eventually they marry, with their friends and family coming to accept their union.
One possible plot could be that Gohan and 18 meet in a rather unexpected situation, like at a martial arts tournament. They start to have conversations and find out they have more in common than they thought. Gohan's kind and intelligent nature attracts 18, and her strong and independent personality intrigues Gohan. As they spend more time together, they gradually fall in love and decide to get married, facing some challenges from their different backgrounds along the way.
It could be that Gohan is kidnapped by a group who wants to study the Saiyan physiology. They might be scientists from a different planet or a secret organization on Earth. They take Gohan in order to run various tests on him, not realizing the danger they're in if Gohan manages to break free. And his friends and family then have to go on a mission to rescue him.
The relationship could develop out of a need for companionship. Gohan, having lost many of his friends and family in battles, is in need of someone who can understand his pain. 18, being an android with her own complex past, also longs for someone to be close to. They meet and initially just offer each other a listening ear. As they talk more, they find that they can comfort each other in ways no one else can. This emotional connection then grows into a romantic relationship, and finally, they marry as they realize they don't want to be without each other.
In this fanfiction, Gohan could be a new member of the Straw Hat Pirates. He would bring his unique skills like the Kamehameha wave. His strength would be a great asset during their adventures, especially when facing strong foes like the Yonko.
Perhaps Hercule tries to train under Gohan in a really clumsy and disrespectful way. He doesn't follow Gohan's instructions and constantly brags about his own non - existent skills. This could lead to Gohan snapping at him out of frustration for his lack of discipline and respect.
Well, it could be about Naruto and Gohan getting transported to the Digimon world. Maybe they team up with some Digimon to fight a common enemy. They could use their unique abilities like Naruto's jutsu and Gohan's ki powers in combination with the Digimon's attacks.
One possible plot could be that Naruto is sent to the Dragon Ball world through some sort of interdimensional rift. Since he has no family there, Gohan's family takes him in. Naruto, with his ninja skills and determination, could team up with Gohan to fight new threats in the Dragon Ball universe. He might also introduce some ninja - like strategies to Gohan and their friends, adding a new dimension to the battles. They could face off against villains who are interested in Naruto's unique powers from his own world, while also dealing with the regular Dragon Ball bad guys.
In a 'naruto son of gohan fanfiction', perhaps Naruto is born with a special power that is a combination of his own ninja abilities and some latent power from being related to Gohan. This could lead to him being an outcast at first in the ninja world as his powers are so different. But as he grows, he learns to master them and use them to protect his village and the world from new threats.
Perhaps there's a powerful artifact that Gohan touches, and it transforms him into a girl as a form of curse. In this new form, Gohan starts to notice different things about himself and the world around him. He might have to learn new ways to fight and move, as his body is now different. His relationships with his friends like Videl and Piccolo could also change, as they try to help him adapt and find a way to break the curse.
One possible plot could be Gohan going back in time to the Saiyan saga. He could use his knowledge of future events to prevent certain tragedies. For example, he might try to save the Saiyans from Frieza's wrath. He could also train with the younger versions of Goku and the other Z - fighters, sharing his advanced techniques and knowledge, which would significantly change the power dynamics in the battles against the Saiyans and later enemies.
In this fanfiction, it could start with Gohan exploring an ancient Saiyan relic. Unbeknownst to him, this relic has the ability to bring back the spirit of Bardock. Once Bardock appears, he is initially confused about where he is and who Gohan is. Gohan, being the kind - hearted person he is, explains the situation. As time passes, Bardock starts to train Gohan, pushing him to new limits. Gohan also shares his knowledge of Earth's culture and values with Bardock, which makes Bardock see a different side of life compared to the brutal Saiyan culture he knew. This interaction could change both of their perspectives and lead to a new understanding between the past and present of the Saiyan race.