One possible plot could be that Fem Orochimaru, for some reason like a powerful jutsu backfiring on her, is forced to become Naruto's slave. Naruto, being the kind - hearted person he is, might initially be uncomfortable with the situation but gradually tries to understand Orochimaru's past and motives. He could use this opportunity to reform her and make her use her skills for good. For example, Orochimaru's knowledge of forbidden jutsus could be used to help the village in some way.
The plot could start with Fem Orochimaru being captured by Naruto during a mission. Instead of killing her, Naruto decides to make her his slave as a way to keep an eye on her and prevent her from causing more harm. As time passes, Orochimaru starts to see Naruto's way of life and his values. She might even develop a sense of loyalty towards him, and the story could end with her becoming a valuable ally of Naruto and the village, having completely changed from her former self.
It could be about Fem Orochimaru having a different relationship with Naruto. Maybe she sees him as a potential ally or apprentice in a new way compared to the original Orochimaru.
A simple plot could be that Fem Orochimaru wants to use Naruto's chakra for her own gain. She tries to capture him but Naruto always manages to escape. Each encounter makes her more obsessed as she realizes how powerful Naruto truly is.
The plot might involve Naruto being in a life - threatening situation where the fem Kyuubi saves him. This act of heroism makes Naruto see her in a new light. They start spending time together, and Naruto begins to learn about the fem Kyuubi's past and her own struggles. As a result, he feels a strong connection to her. Over time, their relationship blossoms, and they become mates. Along the way, they might face opposition from some in the ninja world who don't understand or accept their relationship.
One possible reason could be Naruto's unique power. Naruto has the Nine - Tails within him, which is an extremely powerful and mysterious force. Orochimaru, being a character always interested in power and forbidden jutsu, might be obsessed with Naruto in fanfiction because he wants to study or even obtain that power for himself. Also, Naruto's strong - willed personality and his ability to change the people around him could be fascinating to Orochimaru who has always been somewhat of an outcast in the Naruto world.
This kind of fanfiction goes against the positive values presented in the original Naruto series. Naruto is all about comradeship and respect among characters. Having a plot where one character is the'slave' of another is a very inappropriate deviation. It may also distort the original characters' personalities and the essence of their relationships.
One possible plot could be that Orochimaru's daughter is initially raised with his dark teachings. But then she meets Naruto. Naruto, with his positive attitude and belief in people, starts to make her question her father's ways. She could then struggle between her loyalty to her father and the new path that Naruto represents.
Well, it could be a really strange plot. Maybe in this fanfiction, Fem Harry Potter is intrigued by Orochimaru's dark and mysterious magic. She might see his ability to transform and experiment with different forms of life as something unique. Since she has her own experiences with magic in the wizarding world, she could be interested in exploring Orochimaru's more unorthodox methods. It could also involve her trying to understand Orochimaru's motives, perhaps thinking that there's some good in his actions deep down, which is a very different perspective from what most in the Harry Potter universe would think.
I'm not really sure as I haven't read that specific fanfiction. But generally, in Naruto fanfictions, if Naruto is the 'fem Kyuubi's slave', it might involve some sort of power dynamic where the female version of the Kyuubi has some control over Naruto. It could be a really strange or unique take on the Naruto universe, exploring different relationships and character developments that are far from the original storyline.
At first, their relationship would be full of tension. Naruto would be cautious around Fem Orochimaru as he knows her past. But as he spends time with her, he might start to notice small changes in her behavior. For example, she may start to show more respect for life. And Orochimaru, being a slave, would have to follow Naruto's commands, which could lead to her grudgingly respecting his authority.
One possible fanfiction could involve Fem Orochimaru seeing Naruto as a unique specimen. Maybe she's intrigued by his unwavering will and the power of the Nine - Tails within him. She might try to get closer to him in order to study his power source. For example, she could disguise herself and join Naruto on some of his missions, all the while observing him secretly.