What could be the plot of a '4 kunoichi gets betrayed fanfic'?

It could be their master. Maybe the master has been corrupted by dark forces. He sees the potential in the kunoichi and fears they will become more powerful than him. So, he betrays them to stop their progress.

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.

In a 'cheetara gets betrayed fanfiction', perhaps her closest friend reveals her secrets to her enemies. This could lead to her being in great danger as her foes now know her weaknesses. She might feel isolated and have to struggle alone to overcome the situation.

In this kind of fanfiction, it might be that Amy thinks Sonic has been hiding secrets from her. These secrets could be something she believes are harmful to their friends or the world they live in. So she decides to betray Sonic in order to protect everyone else. Sonic would then be left confused and hurt, having to figure out how to fix the situation.

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.

Well, it could be about Bulma being betrayed by a close friend in the Dragon Ball universe. Maybe that friend reveals her secrets to an enemy, like her latest inventions or the location of the Dragon Balls she was guarding. This would put her in a dangerous situation and lead to a series of adventures where she has to fix the mess.

In the fanfiction, it might be that Tsunade believes Naruto has become too dangerous. Maybe she's misled by false information about Naruto's new powers being uncontrollable and a threat to the village. So she decides to betray him to protect Konoha from a potential disaster.

One possible reason could be jealousy. Maybe the Weaslys in the fanfic become jealous of Harry's fame or special abilities. Another reason might be some kind of dark magic influence on them, which changes their nature and makes them turn against Harry. It could also be due to a misunderstanding. For example, a false rumor spreads about Harry that makes the Weaslys believe he has done something terrible.

One possible plot could be that Naruto grows up with unique ninja skills taught by the kunoichi. He might have a different view on relationships and teamwork compared to canon. For example, he could be more in tune with female perspectives.