Well, one possible plot could be that the doujutsu gives Fem Naruto a special ability to see the truth about Sasuke's past traumas. This new understanding brings them closer as she uses her new - found knowledge to comfort him. Their relationship then deepens in a more emotional and romantic way as they face challenges together with her doujutsu - enhanced perception.
The doujutsu could be a power that Fem Naruto has which is connected to Sasuke's clan's secrets. As she discovers these secrets through her doujutsu, Sasuke is initially angry but then realizes that she can be an important part of his journey to restore his clan's honor. This shared journey leads to their relationship development, with many emotional ups and downs along the way.
Maybe the doujutsu Fem Naruto has is related to time. She can see glimpses of their future together. This causes Sasuke to be more protective of her, and at the same time, makes him more open to the idea of a relationship with her. As they explore what her doujutsu shows, they fall in love in the process.
The doujutsu might make Fem Naruto more empathetic towards Sasuke. For example, if it allows her to see his pain, she can respond in a more understanding way, which strengthens their bond.
The plot could involve them starting a family. Fem Sasuke might be hesitant at first, worried about passing on her troubled family history. However, Naruto is excited and encourages her. They could have a child who has a unique combination of their powers. And then they have to protect this child from various threats, both from outside the village like rogue ninjas who might want to kidnap the child for its power, and from within the village where some might be jealous or fearful of the child's potential. This would bring them closer together as they work as a team to keep their family safe.
A 'Naruto x Fem Sasuke after the war' fanfiction could center around the idea of rebuilding. After the destruction of the war, both Naruto and Fem Sasuke are at the forefront of the reconstruction efforts in the Hidden Leaf. They work side by side to restore homes, train new shinobi, and revive the village's economy. As they do this, they start to see each other in a new light. Naruto admires Fem Sasuke's strength and determination, while Fem Sasuke is drawn to Naruto's unwavering optimism. Their relationship blossoms as they create a new and better future for their village and themselves.
One idea could be that the new doujutsu is related to time. Naruto can then see events from the past and future. This would be a huge advantage. He could learn from the mistakes of his predecessors, like Hashirama and Tobirama. Also, he could foresee the plans of his enemies and be better prepared for battles. He might see that Orochimaru is planning a new experiment in the future and stop it before it starts.
The doujutsu can drive the plot by giving characters unique powers. For example, if a character has a powerful doujutsu, it can make them a target for other characters who want to either steal the power or use it for their own purposes.
Well, perhaps in the fanfiction, Fem Sasuke's blindness is a result of some dark jutsu. Naruto, with his determination, tries to find a way to restore her sight. Along the way, they encounter many old foes and new allies. The story could explore how Fem Sasuke copes with her new disability and how it changes her ninja skills, for example, she might develop new ways of using her Sharingan even without sight.
The plot might involve Naruto with the Rinnegan being a bit of an outcast in the village at first because of the strange and powerful new dojutsu. Fem Sasuke could be the one to understand him and encourage him to embrace it. They could then go on a quest to discover the origins of the Rinnegan together, facing various challenges along the way, like ancient ninja traps and powerful, long - forgotten clans.
Another might be the Byakugan. It gives a wide - range view and can see the chakra points in the body. In fanfiction, new and unique abilities of these doujutsu can be explored. For example, the author might create a situation where the Sharingan can not only copy physical techniques but also mental jutsus.
One possible doujutsu could be a time - manipulating doujutsu. It allows the user to slow down or speed up time in a small area, giving them an edge in battles. Another could be a soul - reading doujutsu, which enables the user to see the true intentions and past experiences of others by looking into their souls.
One possible plot could be that Sasuke realizes his deep connection with Fem Naruto over time. Maybe they go on various missions together and he starts to see her in a new light. As they face challenges side by side, his feelings grow into love and he decides he wants to marry her. He then has to overcome the initial shock of the village and their friends, as it's an unexpected pairing.