One possible plot could be that Naruto and Karin are on a mission together in a new, uncharted land. Along the way, they face many challenges that force them to rely on each other. As they spend more time together, they start to understand each other's pasts and develop a deeper bond.
Obviously, Naruto and Karin are the main characters. Naruto, the hero of the Hidden Leaf Village, and Karin, who has her own set of abilities and a history. In this fanfiction, they will probably be put in various situations together that will explore their characters more deeply. For example, Naruto's optimistic nature might contrast with Karin's more cynical side at first, but as the story progresses, they will influence each other.
Naruto, having been banished, may initially lose his sense of purpose. However, with Karin by his side, he could find a new reason to strive. He might develop a more nuanced view of the ninja world and its politics. Karin, on the other hand, could develop a softer side. She has always been in a tough situation, but Naruto's kindness could make her more empathetic. She may also start to trust others more, especially Naruto, which is a big step for her character.
It could be a story where Naruto's smart side helps him understand Karin's past traumas and he uses his kindness and intelligence to help her heal. He might introduce her to new ways of thinking or training methods that enhance her skills as a ninja. And through this process, they develop a deep bond.
Both characters could develop their relationship in terms of trust. Naruto, who is generally trusting, could face some challenges that make him question Karin at first. Karin, on the other hand, could learn to be more open with Naruto. Their journey towards building a full - fledged trust could be the central theme of the fanfiction, with various events and conflicts testing and strengthening their bond.
One possible plot could be that Naruto, in this fanfiction, realizes Karin's strength and her unique personality. He starts to date her to understand her better. They might go on missions together and during those, their relationship deepens. For example, they could be on a mission to rescue a kidnapped shinobi. Karin uses her sensing abilities to track the enemy, and Naruto is impressed by her skills. This leads to more romantic moments between them.
In this kind of fanfiction, perhaps Naruto saves Karin from some dangerous enemies. For example, Karin might be captured by a group of rogue ninjas, and Naruto, with his strong sense of justice and powerful ninja skills, comes to her rescue. He could use his Rasengan or his shadow clone jutsu to fight off the bad guys and free Karin.
A possible plot could be that Karin discovers a hidden power within herself that could either save or destroy the ninja world. Naruto and Sasuke, being two of the most powerful ninjas, are called upon to either help her control it or stop her if she goes rogue. This would create a complex dynamic between the three characters as they grapple with trust, power and their own personal beliefs.
One possible plot could be that Karin, after spending more time with Naruto during his travels and battles, realizes his true worth. She starts to see him not just as a powerful ninja but also as a kind - hearted person. Naruto, in turn, notices Karin's growth and loyalty. They gradually fall in love and decide to get married. Their marriage could then be a symbol of unity between different ninja clans or groups that they are associated with.
Well, in such a fanfiction, perhaps Naruto is banished because of false accusations. He meets Karin, who is also an outcast in a way. They form an alliance to survive in a dangerous world. Naruto might teach Karin about the power of friendship and loyalty, while Karin shows Naruto some of the secrets of her clan's jutsu. Their relationship could gradually develop into a deep friendship or even more as they face various challenges together.
Well, it could be a story where Karin has some knowledge about a strange phenomenon that's starting to affect Boruto's chakra. Naruto, as a protective father, gets involved. Karin might be the key to unlocking the mystery behind it. Maybe she has a personal vendetta against an old enemy who is causing this, and Boruto and Naruto end up helping her while also protecting the village from the potential danger.