A plot could be that they travel to a time just before a significant prophecy was made. Fem Naruto and Gaara, knowing the outcome of the prophecy in their own time, could try to influence it. They might meet the seer and try to change the words of the prophecy. This would cause a ripple effect throughout the ninja world's history. Also, they could time travel to an era where a powerful and ancient ninja art was lost. Their mission could be to find and preserve it, while also dealing with the different social and political climates of that time.
One interesting plot idea could be that fem Naruto and Gaara travel back to the time when the Hidden Leaf Village was first founded. They could use their modern - day knowledge and skills to change certain events that had a negative impact on the village's future. For example, they might prevent a certain battle or reconcile feuding clans. Another idea is that they travel to a time when a great evil was about to be unleashed, and they have to work together to stop it before it's too late. Maybe they meet younger versions of their friends and family and have to convince them to trust their strange knowledge of future events.
One plot idea could be that fem Naruto and Kakashi travel back to the founding of Konoha. They could use their modern - day knowledge and skills to influence the early development of the village in positive ways, like introducing new training methods. Another idea is that they travel to a time when a great enemy first emerged and they work to stop the threat before it becomes too powerful.
One idea could be that fem Naruto travels back in time and has to hide her identity from Minato at first. She could then gradually reveal herself and use her future knowledge to help Minato prevent some of the tragedies that occurred in the original timeline. For example, she might know about certain Orochimaru plots and stop them before they start.
One idea could be their journey in building a family together. Naruto, with his positive and determined nature, helps Fem Gaara adjust to the idea of a more traditional family life. They might face challenges like dealing with the different cultures of their respective villages.
Maybe in the fanfiction, Fem Gaara is sent to the Hidden Leaf Village for some diplomatic training. There, she meets Kid Naruto who is initially curious about her. They get into all sorts of adventures together, like exploring an old, forgotten part of the forest. Along the way, Naruto's positive attitude starts to melt Gaara's cold exterior and they begin to fall in love.
One idea could be that their pregnancies bring the two villages closer together. With Fem Naruto and Gaara both expecting, it could lead to a new era of peace as the two most powerful ninja from their respective villages are about to become parents. This could involve joint efforts in protecting the future of their children, like creating a new safe haven for the new generation.
One interesting plot twist could be that when they travel back in time, they accidentally change an event that was crucial for the formation of their friendship. So instead of being friends or at least allies later in life, they become enemies in the new timeline. Another could be that they go back to a time when their villages were at war, and they have to work together secretly to stop the war without revealing their time - traveling identities.
One idea could be that fem Harry travels back in time and tries to prevent Tom from becoming Voldemort. Maybe she uses her knowledge of the future to show him a different path, like introducing him to the concept of love and friendship earlier. Another plot could involve them traveling to different time periods together and having to solve mysteries related to magic in those eras.
One idea could be a story where Sarada goes on a mission to Sand Village and meets Gaara. They start to exchange their views on leadership, as Gaara has a lot of experience in leading his village. Sarada could learn a great deal from him about being a responsible and empathetic leader.
One plot idea could be that Female Gaara, being the Kazekage, forms an alliance with Konoha led by Naruto. They start off as cautious allies but gradually develop a deep friendship as they face common threats. Their different leadership styles - Gaara's more reserved and Naruto's more exuberant - could create interesting dynamics.
A really interesting plot might be that fem Gaara is cursed, and Naruto has to go on a quest to find the cure. Along the way, they encounter various challenges and meet different characters from the Naruto universe. This plot would not only focus on their relationship but also on the world - building and the lore of the Naruto series. It could also explore how Naruto's determination and Gaara's inner strength play a role in their journey.