Another plot could involve jealousy. If Sakura becomes jealous of Naruto's growing popularity and power among the villagers, she might betray him. She could spread false rumors about him, which would lead to the villagers turning against Naruto.
In such a fanfic, the plot might start with Naruto's friends gradually turning against him due to false rumors spread by a hidden enemy. They could start to exclude him from missions and isolate him within the village. For example, Sasuke might believe the lies and challenge Naruto, thinking he has changed for the worse. This would lead to a series of battles where Naruto has to fight not only his former friends but also his own feelings of betrayal and confusion.
Maybe Natasha, in this fanfic, could be working undercover among Naruto's group for some secret mission. She gains Naruto's trust over time, but then reveals her true motives which are against Naruto's goals, thus betraying him.
Well, it could be that Naruto misinterprets something Sakura says to Sasuke and makes a comment that offends her deeply. Sakura, being the strong - willed character she is, doesn't hold back and punches Naruto. This could then start a chain of events where Naruto tries to make amends, and through this process, their friendship becomes stronger as they understand each other better.
One possible plotline could be that Naruto accidentally uses his fingers in a special jutsu near Sakura and it has an unexpected effect on her chakra. Maybe it disrupts her normal chakra flow momentarily, leading to a situation where Naruto has to help her regain control. This could be a way to deepen their friendship or understanding of each other's powers in the fanfic.
The main antagonist might be an organization that wants to take over the Hidden Leaf Village. They see Naruto as a major obstacle because of his strength and influence among the villagers. So, they devise a plan to make everyone in the village betray Naruto. They use mind - control techniques or spread misinformation on a large scale to achieve their goal. This way, they can weaken the village from within before making their move to take it over.
Perhaps in the fanfiction, the Sandaime betrays Naruto by revealing his secrets to the wrong people. Like, he tells about Naruto's connection to the Nine - Tails in a way that endangers Naruto. It could be because the Sandaime is trying to protect the village at all costs, even if it means sacrificing Naruto's well - being and trust.
Another plotline could be that Sakura makes a decision that deeply affects Naruto's life in a negative way. Maybe she chooses to side with an enemy against Naruto's wishes, and this betrayal makes Naruto feel so hopeless that he becomes depressed. In these fanfictions, the writers often explore the complex relationships between the characters and how their actions can have far - reaching emotional consequences on others. There's also a possibility that Sakura's actions cause Naruto to lose his dream or his sense of purpose, pushing him into a depressive state as he feels lost without that driving force in his life.
Well, it could start with Anko being given false information about Naruto. Let's say someone convinces her that Naruto is secretly working with an old enemy of Konoha. She then starts to spy on Naruto. As she does this, she uncovers some things that seem to confirm the false information, but in reality, they are just coincidences or set - ups. So, she feels she has no choice but to betray Naruto to protect the village. It could also be that Anko has her own ambitions that conflict with Naruto's goals for the village, and she sees betraying him as a way to achieve her own ends.
One possible reason could be jealousy. Naruto is very powerful and some in Konoha might be envious. For example, some minor clans might feel that Naruto, as an outsider in a sense, gets too much attention and resources. Another reason could be fear. His Nine - Tails power is so immense that some might fear he could lose control and endanger the village, so they betray him to try and eliminate the 'threat' before it's too late.
A plotline might involve Ash being betrayed by a new acquaintance he meets on his journey. This person could pretend to be his friend, gain his trust, and then use that trust to steal his Pokémon or important items. Or perhaps Ash is betrayed by a Pokémon he just caught. The Pokémon could have been planted by an enemy trainer to spy on Ash and then turn on him at a crucial moment.