Well, perhaps they leave to find answers about the Uchiha clan. Naruto, being Sasuke's friend, decides to accompany him. They could end up in some ancient ruins where secrets about the Uchiha are hidden. Along the way, they have to face challenges like lack of supplies and hostile ninjas who don't want them to uncover those secrets.
In this kind of fanfiction, one possibility is that they go on a journey to discover new jutsu together. They might leave the Hidden Leaf Village to find a place where they can train without the constraints of the village rules. Maybe they encounter new and powerful enemies that force them to rely on each other more than ever, strengthening their bond.
They might leave because they want to start a new life away from the chaos and politics of the village. Naruto and Sasuke could head to a remote island. There, they build a small settlement and start training the local kids in ninjutsu. They also use this time to reflect on their past and heal from all the traumas they've been through.
One possible scenario is that Naruto would be initially shocked. He has always seen Sakura as Sasuke's love interest. But he might accept her feelings gradually. Sakura, on the other hand, would have to deal with the guilt of leaving Sasuke. Naruto could help her through this and they might start a new life together, facing the challenges of the ninja world as a couple.
One possibility is that they go on a journey of self - discovery. Away from the constraints of Konoha, Naruto and female Sasuke might explore new jutsu and powers. They could encounter new enemies and allies, and perhaps form a new ninja group that operates outside the traditional shinobi village system.
In this fanfiction, Naruto might be leaving with Tsunade for a top - secret mission. Maybe they are going to investigate a new threat that has emerged in a far - off land. Tsunade, being the experienced Hokage, could be guiding Naruto on this journey, sharing her wisdom and combat skills along the way.
In a fanfiction, they could be involved in a race. Naruto's speed, Sasuke's sharingan - enhanced perception, and Hinata's byakugan - aided navigation could all play a part. Maybe they start off competing against each other but then realize that there's an outside threat during the race. So they put aside their differences and work together to overcome the threat, forging a stronger bond in the process.
If they are cousins in fanfiction, it could change the whole dynamic of the ninja world. Their combined strength as family members could be a threat to their enemies. They might be able to use their family connection to bring peace to the villages in a different way. Maybe they could form a new kind of alliance based on family rather than just friendship or rivalry. And this could inspire other ninja clans to also seek peace through family connections.
Well, it could be that Sasuke captures Naruto as part of a plan to protect him from a greater threat that Naruto is unaware of. Maybe Sasuke has some inside information about a powerful enemy who is targeting Naruto, and by 'capturing' him, he can keep Naruto in a safe place until the danger passes.
When Naruto leaves Team 7 in this Naruhina fanfic, it could set off a chain of events. Hinata might start training harder to be strong enough to support Naruto. Their interactions could involve Hinata sharing her own insecurities with Naruto, which makes him see her in a new light. This mutual sharing and support can be the foundation for a deeper Naruhina relationship, while also dealing with the consequences of Naruto's departure from the team.
In this fanfiction, Naruto might use his inheritance to go on a journey of self - discovery. He could explore new jutsu or meet old foes with new power. Maybe he'll travel to places he's never been before to understand more about his family and his roots.
One possible reason could be her long - standing and deep - rooted love for Sasuke. Since childhood, she has had strong feelings for him. Maybe in this fanfiction, she realizes that her feelings for Sasuke are unshakable and that she can't continue to be with Naruto while having such intense feelings for another.
One possibility is that the story could focus on the emotional journey of the characters. For example, if Sakura is pregnant, she might be worried about how her friends and the village will react. Naruto could be there to support her, offering his positive energy and friendship. Sasuke might be more reserved in his support but still be there in his own way.