In this fanfiction scenario, Naruto could leave Konoha due to some sort of misunderstanding. Maybe the people of Konoha in the Fairy Tail world suspect him of being too dangerous with his unique abilities. So, he leaves to prove himself elsewhere, perhaps by joining a different guild or team in the Fairy Tail world that is more accepting of his different nature.
Perhaps Naruto leaves Konoha in the Fairy Tail fanfiction because he has a vision or a prophecy to fulfill that requires him to journey outside of Konoha. He might believe that the Fairy Tail world holds the key to his destiny. He could be on a quest to find a powerful magic item or learn a special magic spell that is said to be able to help him save both the Ninja world and the Fairy Tail world from an impending doom.
Perhaps Naruto is on a quest to find a way back to his own world. He realizes that staying in Fairy Tail is only delaying his journey. He has a sense of loyalty to his own friends back home like Sasuke and Sakura. So he leaves Fairy Tail, even though he has made some friends there, in order to pursue his ultimate goal of returning to Konoha.
Well, perhaps Naruto could be framed for a crime in Konoha and then be forced to leave as an assassin. He might start working for an enemy village at first, but then gradually realizes that there's a deeper conspiracy behind his framing. So he decides to clear his name and also protect Konoha in the end.
Well, it could be that Naruto, with his godlike powers, leaves Konoha because he feels misunderstood. Maybe the villagers still fear his power despite all he has done for them.
In this fanfiction, perhaps Naruto leaves Konoha because he's being framed for something he didn't do. As he flees, he encounters Temari. Temari, being a strong - willed character, might be intrigued by Naruto's situation. She decides to help him clear his name. During this process, they travel to different places, learn about each other's pasts and dreams, and their relationship evolves from distrust to mutual respect and then to a deeper connection.
Well, perhaps Naruto is neglected in Konoha because of his past or the way he behaves. He leaves and stumbles upon a hidden village that has different values. There, he is welcomed and trained further. As he grows stronger, Konoha realizes their mistake. Naruto has to decide whether to forgive Konoha and return or stay in his new - found home where he is respected.
Perhaps Naruto leaves because he wants his child to grow up away from the pressures and expectations that come with being in Konoha. He might feel that the outside world can offer a more peaceful and normal upbringing for his family.
One possible plot reason could be discrimination. In the Naruto world, there are often biases against those with different abilities or appearances. If Fem Naruto is constantly facing unfair treatment in Konoha due to her being a female version of Naruto, she might decide to leave. For example, she may not be given the same opportunities as male ninjas in training or missions. Another reason could be a search for identity. Maybe she feels that she can't truly be herself in Konoha and needs to go on a journey to discover who she really is away from the village that has so many expectations of her.
Another reason could be related to a secret mission. In some fanfictions, Naruto might be given a top - secret mission that requires him to leave Konoha undercover as an 'assassin'. This mission could be something that only he can do, perhaps related to protecting the village from a powerful hidden enemy. So, he has to leave and take on this dangerous role away from the prying eyes of the villagers.
One possible plot could be that Lucy and Juvia leave Fairy Tail to go on a self - discovery journey. They might want to explore their individual magic powers more deeply without the constraints of the guild. Maybe they travel to different magical realms, meet new characters, and learn unique magic techniques that they can bring back to Fairy Tail later.
One possible plot could be that Natsu and Erza leave Fairy Tail due to some kind of internal conflict within the guild. Maybe there are differences in opinions regarding how the guild should be run or what kind of jobs they should take. So they decide to set out on their own journey to find a new purpose.