One popular plot idea could be that Sakura and Itachi travel back to a crucial moment in the ninja world's history. For example, they might go back to the time when the Uchiha clan was on the verge of being massacred. Sakura, with her medical skills and modern knowledge, could try to find a non - violent solution to the Uchiha - Konoha conflict. Itachi, on the other hand, would have the chance to relive that moment and perhaps change the fate of his clan. Another idea is that they travel to the future. There, they see the consequences of the actions in their own time and try to go back and correct things in their present. This could involve seeing a destroyed Konoha and working together to prevent it.
Perhaps in the fanfiction, the first time is when Sakura is sent to spy on Itachi. But instead of hating him as she expected, she discovers a side of Itachi that is full of pain and regret. This changes her perception of him completely and she decides to try and help him, leading to a complex relationship between them.
One possible plot could be that Sakura and Itachi travel back in time to the Uchiha massacre. Itachi, having a second chance, might try to find a different way to save the Uchiha clan while still protecting Konoha. Sakura, with her medical skills and knowledge of future events, could assist him. For example, she could help him find evidence to prove the Uchiha's innocence to the village elders, thus preventing the massacre from happening at all.
Maybe they time - travel to a time when a great war was about to start. Sakura, with her medical skills, and Sai, with his strategic thinking from being an Anbu, could work together to prevent the war. They could try to change the minds of the leaders involved by showing them the future consequences of the war. This would involve a lot of sneaking around and trying not to be discovered as time - travelers.
One interesting idea could be Itachi traveling back in time to prevent the Uchiha massacre. He could use his knowledge of future events to find a way to resolve the conflict between the Uchiha clan and the village without bloodshed. Another idea might be Itachi traveling forward in time to see the consequences of his actions and how his younger brother Sasuke has turned out. He could then try to guide Sasuke in a different direction from the future he witnessed.
One idea could be that Naruko travels back in time and accidentally disrupts Itachi's life before the Uchiha massacre. This could lead to her trying to prevent the tragedy while also dealing with the complex web of Uchiha politics. Another plot could be Itachi traveling to the future and meeting an older, more powerful Naruko, and together they have to face a new threat that's related to both their pasts.
One idea could be that during their time travel, Naruto and Itachi end up in a time when the Uchiha clan was not massacred yet. Itachi has to face his past self and Naruto tries to find a way to prevent the tragedy without changing too much of the future. Another plot could be that they travel to a future where everything is in chaos and they have to use their combined skills and new - found relationship to set things right.
A plot could involve Sakura getting caught in a political intrigue within the Anbu that Itachi is also a part of. Itachi tries to keep Sakura out of it, but she's determined to uncover the truth. This leads to a series of events where they have to rely on each other's strengths and overcome their own weaknesses.
Another plot idea could be that the contract was made by an ancient force and it requires them to go on a quest to find a lost artifact. Along the way, they face many challenges and their relationship changes from initial distrust to a strong friendship or even something more. They have to rely on each other's strengths and overcome their weaknesses.
One plot idea could be that Sakura, as a medic in the Anbu, is assigned to a mission with Itachi. They initially have some misunderstandings due to their different personalities. Sakura is outspoken and Itachi is more reserved. But as the mission progresses, they start to understand and respect each other's skills. Sakura learns from Itachi's stealth and combat techniques, while Itachi comes to appreciate Sakura's medical knowledge and her tenacity in difficult situations.
One idea could be that Itachi is a new transfer student in Sakura's highschool. Sakura, being the studious and kind - hearted girl she is, is assigned to help Itachi catch up with the lessons. This could lead to them gradually developing a friendship and maybe more as they discover each other's secrets and talents.