One possible plot development could be Naruto leaving to find a way to prevent Sasuke from ever wanting to leave in the first place. He might embark on a journey to discover the root cause of Sasuke's hatred and try to resolve it from afar. This could lead to Naruto meeting new characters who have insights into the Uchiha clan's past and Sasuke's state of mind.
Sakura would be extremely affected. Instead of constantly worrying about Sasuke leaving, she'd be focused on Naruto. She might feel guilty that Naruto left because of Sasuke. Her relationship with Sasuke would also change as she might blame him in some way for Naruto's departure.
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.
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.
This type of fanfiction concept is really out of the ordinary. Naruto's character is built on his values of friendship, loyalty, and his dream of becoming Hokage. Killing Sasuke would mean betraying all of that. However, in a fanfiction, the author might be exploring the 'what - if' scenario. For example, what if Sasuke's actions against Konoha were so heinous that Naruto felt he had no choice? But still, it's a far - fetched and very different view from the original Naruto we know.
Perhaps they are forced to leave due to false accusations or being framed for something they didn't do. This could create a situation where they feel they have no choice but to leave Konoha in order to clear their names and also protect the village from the real threats that might be lurking in the shadows.
One possible plot development could be that Naruto has been away on a super - secret mission. The village is facing a new and powerful enemy. The story could show how the villagers realize just how much they rely on Naruto. His friends like Sasuke and Sakura could start a campaign to bring him back, convincing the elders that they need his strength. Maybe they send out search parties to find him and bring him home.