Another plot could be that the fem oc's pregnancy is a result of a prophecy. Naruto, who is initially shocked but then accepts his new role as a future father, has to figure out how to balance his duties as a shinobi and his responsibilities towards his family. He and the fem oc then go on a journey to discover more about the prophecy and how it will impact their child's future.
Maybe the fem oc has a special power that gets enhanced during her pregnancy. This could attract the attention of Orochimaru who wants to use her and the baby for his evil experiments. Naruto then has to team up with his friends to stop Orochimaru and protect his family.
The fem oc could be a healer who is assigned to take care of Naruto after a particularly tough battle. She has a very calm and nurturing personality. As she heals him, they start to share stories about their pasts. Naruto is intrigued by her selfless nature and she is inspired by his determination. This leads to a slow - burning relationship as they get to know each other better.
A plot idea could be that there is some sort of threat to the pregnancy. Maybe an old enemy of either Naruto or Sasuke resurfaces and tries to target the unborn child. This would lead to them having to go into hiding and rely on their closest friends for protection. Or perhaps they discover some unique ninja ability that the baby might inherit, and they have to figure out how to nurture that ability even before the baby is born.
A possible plot is that the pregnancy is a result of some sort of chakra - related phenomenon. This causes some concerns among the medical ninjas in the village. Naruto and Sasuke have to deal with the mystery behind it while also preparing for their new family member. They might have to travel to different places to seek answers, all while Sasuke is dealing with the physical and emotional changes of pregnancy.
Maybe the fem kami comes to the human world where Naruto lives and she has to adapt. Naruto becomes her guide, and as they face challenges together like dealing with rogue ninjas or natural disasters, they start to fall in love. This would involve a lot of character development for both of them, as Naruto would have to understand the ways of the kami, and the fem kami would have to understand the harshness of the human ninja world.
One idea could be a story where Fem Kabuto is a spy in a different village but Naruto discovers her true identity and instead of turning her in, he tries to understand her motives. This could lead to a deep friendship and eventually more. Another plot could be Fem Kabuto using her medical skills to save Naruto during a tough battle and they start to bond over their shared experiences of being alone at times. A third plot could be that Fem Kabuto has a secret mission related to Orochimaru but Naruto's positive influence makes her question her loyalty to Orochimaru.
One plot idea could be that in an alternate universe, Fem Jiraiya is Naruto's mentor instead of the male Jiraiya. She could teach him some unique jutsu that are different from the original. Another idea is that they go on a journey together where Fem Jiraiya has a secret mission related to Naruto's heritage and they gradually develop a deep bond. Maybe she has a different approach to training Naruto, focusing more on his chakra control from the start which gives Naruto an edge in his development.
One plot idea could be that Fem Kiba discovers a new jutsu that only Naruto can help her perfect. They go on a journey together to different hidden villages in search of the knowledge and ingredients needed for the jutsu. Along the way, they face various enemies and make new friends. Another idea is that they are both chosen for a special mission that requires them to pretend to be a couple. As they pretend, they start to understand each other on a deeper level and form a real bond.
A plot could involve the fem alien being in danger on Earth and the OC coming to her rescue. This could lead to a bond between them. Maybe the OC discovers that the fem alien has special powers that she needs to hide from the wrong people on Earth. They then have to work together to keep her safe and in the process, they fall in love.
A third plot might be that the OC is a new arrival in a nightmarish realm. The fem Pyramid Head, who has been alone for a long time, sees the OC as something different. The two start to communicate in their own way, perhaps through gestures and shared experiences. As time passes, they find that they are each other's only source of comfort in this terrifying world.
One plot idea could be that Fem Naruto, having a unique bond with Fem Kyubi, goes on a journey to discover more about the origin of the Kyubi's power. They face various challenges together and in the process, Fem Naruto learns to control and utilize the Kyubi's power in new ways.