Many relationships would be affected. For example, Sasuke's story would take a different turn. He might not have the same motivation to return to Konoha if Naruto is not there. Also, Naruto's other friends like Sakura would be devastated and might set out on a journey to find him. The power dynamics in the ninja world would shift as well, with other villages possibly seeing Konoha as weaker without Naruto.
One possible reason could be fear. Naruto has the Nine - Tails within him, and some in Konoha might be too afraid of its power getting out of control. They may not fully trust Naruto to keep it in check.
One possible reason could be that Naruto discovers some dark secrets about the village leadership that go against his values. For example, if he finds out that they have been using underhanded means to maintain power.
At first, Naruto is likely to be heartbroken. Konoha has been his home, and he has always longed for acceptance from the villagers. So being abandoned would be a huge blow to him.
One possible reason could be feeling betrayed by the village leaders. Maybe they made decisions that Naruto strongly disagreed with, like how they treated certain groups or individuals. If Naruto felt that Konoha was no longer the place that stood for justice and fairness as he once believed, he might abandon it.
As for Kakashi, he would be in a difficult position. He has mentored Naruto and also has a strong loyalty to Konoha. He might try to understand Naruto's reasons while also having to deal with the village's reaction. Their relationship could become strained as Kakashi tries to balance his duties to the village and his connection with Naruto.
This fanfiction might make Naruto more of a loner. In the original, he was always surrounded by friends and the support of the village. Abandoning Konoha would force him to rely only on himself and his own powers. His character could become more cynical as he distances himself from the place he once called home.
One possible reason could be for his safety. Konoha is a well - protected village with many skilled ninja. She might believe that leaving him there would ensure he has the best chance at survival and growth as a ninja. Also, she may have some mission or obligation that forces her to leave him behind, perhaps something related to the greater good of the village or the ninja world in general.
The 'The Sealmaster of Konoha' Naruto fanfic is likely to be an interesting piece of fan - created work. It probably focuses on a character who is a sealmaster in the village of Konoha. Fanfics like this often explore new abilities, relationships, and storylines within the Naruto universe. For example, the sealmaster could have unique sealing techniques that help in battles or protecting the village.
Maybe in the fanfic, Naruto has faced too many political intrigues within Konoha. He has always been loyal to the village, but if he constantly encounters backstabbing or unfair treatment from some of the village's leadership or clans, it could lead to his weariness.