One idea could be that little Naruto gets lost in the forest and Kakashi has to find him. Along the way, Kakashi discovers Naruto's secret hiding place filled with his dreams and wishes written on little scrolls.
A more action - oriented plot could be that an enemy targets little Naruto because of his potential. Kakashi then has to protect Naruto at all costs. This could involve some intense battles and Kakashi using his Sharingan in creative ways to outwit the enemy. Meanwhile, Naruto is eager to help but Kakashi has to keep him safe.
A possible plot is that Naruto discovers a hidden power within Kakashi that even Kakashi was unaware of. This discovery leads them on a journey to explore the origin of this power. Maybe it's related to an ancient clan. As they dig deeper, their relationship grows stronger and they face many challenges together from enemies who also want this power.
One idea could be a story where young Kakashi has to protect a young Naruto from a group of rogue ninjas. It could show Kakashi's early skills and Naruto's innocent yet determined nature.
A really interesting plot for 'kakashi and naruto family fanfiction' could be that Kakashi accidentally stumbles upon a secret power within Naruto's family that has been dormant for generations. He then helps them unlock and control this power. Along the way, they form a stronger bond as a family. And as Kakashi is involved, he also rediscovers some of his own values and beliefs through this process.
One plot idea could be that the female Naruto has a special training session with Kakashi. During this, she discovers a new jutsu that Kakashi has been secretly working on. He decides to teach it to her because he sees her potential. This new jutsu then becomes crucial in a future battle against a powerful enemy.
One interesting plot idea could be Kakashi getting transported into a different Naruto timeline where all the villains have joined forces. He'd have to use his Sharingan and vast combat experience to survive and find a way to stop them. Another could be Naruto and Kakashi swapping bodies for a while. This would lead to some comical situations as Naruto tries to act like Kakashi and vice versa. Also, a crossover where Kakashi is sent to a parallel universe where Naruto doesn't exist, and he has to train a new group of ninja in the ways of Konoha.
One idea is that an enemy targets Kakashi's Sharingan and Naruto has to protect it. Along the way, Naruto learns more about the Sharingan's capabilities and how to use it against the enemy. This would be a great opportunity for Naruto to grow as a ninja and for their friendship to deepen.
One idea could be that Female Kakashi is assigned to train Naruto in a special jutsu. During their training, they discover a long - forgotten scroll that contains a powerful technique. As they work together to master it, they face challenges from other ninja who want the scroll for themselves.
Perhaps a story where Kakashi's past Anbu experiences resurface during a mission with Naruto in the Anbu. They have to deal with an old enemy that Kakashi thought was long gone, and Naruto helps him come to terms with his past traumas.
One idea could be that Female Kakashi is assigned to train Naruto in a special jutsu. During their training sessions, they develop a unique bond and learn from each other's experiences. Naruto might teach her about the power of never giving up, while Kakashi could show him some advanced ninjutsu techniques.
Perhaps in this fanfiction, Fem Naruto has a unique ability that only Kakashi can help her control. As they train together to master this power, they spend a lot of time in close proximity. This leads to them sharing personal stories and gradually falling in love. For example, Naruto might open up about her insecurities of being a female ninja in a male - dominated world, and Kakashi would comfort and encourage her.