The plot could be that Ben meets a girl who is a scientist - in - training. She is fascinated by the Omnitrix and wants to study it. Ben is initially hesitant but then grows to like her curiosity. As they work together to understand more about the Omnitrix and its powers, they fall in love. But there's a problem. An evil villain wants to steal the Omnitrix and will stop at nothing. Ben has to protect both the girl and the Omnitrix, and in the process, their love is tested.
In a Ben Ten love story, the plot could be that Ben travels to an alternate dimension where he meets a version of himself who is in love with a local girl. Ben from our dimension starts to develop feelings for this girl too. But the alternate Ben is not happy about it. There's a power struggle between the two Bens, and the girl is caught in the middle. Meanwhile, an outside threat from another dimension is looming, and they have to work together to save the girl and both their dimensions. Along the way, Ben has to figure out his true feelings for the girl and how to handle this complex situation.
Well, perhaps the fanfiction focuses on how they first realized their feelings for each other. It might start with small moments of attraction, like a lingering glance or a kind gesture that gradually blossoms into full - blown love. And then it could explore how they deal with the public's reaction to their relationship, as they are likely to be in the public eye.
In this fanfiction, it could be that the Necrofriggian babies are the result of some sort of experiment gone wrong. Ben stumbles upon them and realizes that he is the only one who can help. He has to figure out how to reverse the effects of the experiment while also dealing with the fact that the babies are in a very fragile state. He might enlist the help of his friends, but also face challenges from those who don't want the experiment to be reversed.
One idea could be that Ben Tennyson somehow gets transported to the Fairy Tail world. He could team up with Natsu and the gang to fight a common enemy that has the power to absorb alien DNA like Ben's. They would combine their different powers and fighting styles to take on this new threat.
One possible plot could be that Esther gets caught up in an alien conspiracy in the Omniverse. Ben, being the hero, steps in to save her. As they work together to uncover the truth behind the conspiracy, they start to fall for each other.
Well, in a 'Ben 10 Omniverse Ben x Kai' fanfic, perhaps it could start with Kai joining Ben on one of his inter - dimensional adventures. Along the way, they encounter various challenges that test their relationship. Ben might use his Omnitrix in creative ways to protect Kai, and in the process, they realize their mutual attraction. For example, when they are trapped in a strange alien world, Ben has to transform into different aliens to find a way out while also keeping Kai safe from the local dangers.
Well, in a Ben Ten love story, Ben could be smitten with a girl from his school who has no idea about his secret identity as a hero with the Omnitrix. He has to balance his normal life with her and his life as Ben Ten. At first, he's really clumsy around her, not knowing how to act. But when she gets into trouble one day, Ben uses his powers as Four Arms to protect her. This is when she starts to suspect there's more to Ben than meets the eye, and their relationship takes an interesting turn.
Another possibility is that the cat is a messenger from another world. Ben, Ten, Ken, Devlin and Kevin are chosen to interact with the cat and decipher the messages it brings. This could lead to a journey through different dimensions or a discovery of long - lost secrets.
It could be about their adventures together. Maybe they go on a journey through a magical forest, facing various challenges like talking animals and enchanted obstacles.
The plot might involve Ben being captured by a new and powerful alien race. They could be interested in the Omnitrix technology. Ben would have to figure out their weaknesses while being held captive, and perhaps make some unexpected allies among the other captives. He'd then use his wits and the powers of the Omnitrix to break free and save the day.
The plot could be about Ben using the Benfire form to save the world from a new, fire - based threat. Maybe there's a villain who can control all kinds of fire and is causing chaos, and only Ben in his Benfire form has the power to stop it.