The elders of his family or clan could be the main antagonists. They might have exiled Naruto in the first place due to some old - fashioned beliefs or fear of his power. Throughout the fanfiction, they could try to stop Naruto from finding out the truth or coming back to the clan.
Another development could be Naruto seeking out his real family's secrets. Maybe he discovers that there was a misunderstanding that led to his exile. He could then go on a journey to prove his worth and clear his family's name. Along the way, he might meet other clans or characters who help him in this quest.
At first, Naruto might be shocked and confused. He would probably wonder why his own clan would do such a thing to him. He might feel a deep sense of betrayal, especially since he has always longed for a family and a sense of belonging within the Uzumaki clan. But being Naruto, he would soon turn his confusion and pain into determination. He would vow to prove himself and show the clan that they were wrong to exile him.
Well, in fanfictions, often the plot takes a different turn. Naruto might hide from his family because there could be some sort of misunderstanding. For example, there could be false rumors about him being involved in something bad. And he might think that his family would believe those rumors without giving him a chance to explain. So, to avoid the immediate confrontation and judgment, he chooses to hide.
Naruto could be afraid of being seen as weak. In the ninja world, weakness is often frowned upon. He has a reputation to uphold, especially in front of his family. He doesn't want them to think that he can't handle his problems, so he hides his pain. He also might be trying to be strong for his family. If they see him in pain, it could affect their morale. So, he pretends that everything is okay to keep their spirits high and to give them the impression that they can rely on him no matter what.
One possible reason could be a misunderstanding. Maybe Naruto overheard something his family said that he misinterpreted as them not loving or believing in him. For example, if he heard them talking about his wild nature or his past mistakes in a way that he took the wrong way.
However, it could also have negative impacts. He might start to feel lonely and bitter, which could lead to him making some bad decisions. He could be more easily influenced by the wrong people or ideas because he lacks the grounding that his family usually provides. Also, his relationships with his friends might become strained as he tries to keep them at a distance too, thinking that they'll side with his family.
In this fanfiction, Naruto's exile could be due to political reasons within the Fairy Tail guild. There might be a faction that fears his growing influence. Since Naruto is used to being an outsider in his own world too, he might initially be heartbroken but then decides to prove himself outside the guild. He could start his own group of misfits, similar to how he was part of Team 7 in his original story.
In many 'Naruto Exiled from Konoha' fanfictions, the Akatsuki members could be involved. They might view Naruto as a valuable asset now that he's an outcast from Konoha. Naruto could either befriend some of them, like Pain, who sees Naruto's potential and decides to help him in his exile, or he could be constantly on the run from them as they try to capture him for their own purposes.