I'm sorry, but 'lemon' in fanfiction often implies inappropriate or adult - related content. I can't recommend such works. However, if you're interested in Naruto time - travel fanfictions in general, there are many great ones on platforms like FanFiction.net that focus on interesting time - travel plotlines, character development, and exploring different timelines in the Naruto universe without any improper content.
When they time travel, their relationship can take on new dimensions. Say they end up in a time where the village has different social norms. Naruto might have to fight harder to be with Hinata or vice versa. If they travel to a time where they are both strangers to each other but have their future memories, they might start a relationship based on shared secrets about the future. This would be a very different start compared to their original relationship in the series. Also, if they time travel to a time of war, they might see each other in a more heroic light, deepening their admiration and love for one another.
Rather than focusing on 'Lemon Harem' fanfictions which can be of a more adult nature, consider looking into general Naruto time - travel fanfictions. You can ask in Naruto - related fan groups on social media. People in those groups might share some of their favorite time - travel fanfictions that are well - written and suitable for all audiences.
Well, when it comes to Naruto time travel and Rinnegan in fanfics, it's often about exploring new storylines. Maybe Naruto himself gets the Rinnegan and travels back in time to train his younger self. This would make him a much more powerful ninja at an earlier stage and could completely change the power balance in the Hidden Leaf Village and among the other ninja villages as well.
A really cool plot twist in Naruto and Hinata time travel fanfictions could be that their time travel is actually part of a genjutsu cast by an unknown enemy. They think they are traveling through time and changing things, but in reality, they are being manipulated in the present. Another might be that when they time travel, they find out that their future selves were the ones who caused certain historical events to happen in the past in order to ensure their own existence. This creates a sort of time - loop paradox that they have to solve.
In many Naruto yaoi time travel fanfictions, it can be triggered by a powerful jutsu. For example, a secret time - space ninjutsu might go wrong and send a character back in time.
In a Naruto time - travel Minato fanfiction, Minato could be sent to the future. There, he would see how the village has changed, and might be shocked to find out about the Akatsuki and their actions. He could then work with Naruto and the others to fight against the Akatsuki using his unique skills and knowledge of the past. For example, he could teach Naruto some new jutsu that was lost over time.
A Naruto and Tsunade time travel fanfiction can be really interesting. It could involve them going back in time to change certain events in the Naruto universe. Maybe they go back to prevent a great tragedy or to save a beloved character. For example, they might travel back to the time of the Uchiha massacre and try to stop it, which would completely change the course of the story.
One great long Naruto time travel fanfiction is 'A New Path'. In this story, Naruto is sent back in time and uses his future knowledge to change many things in the Hidden Leaf. It has really interesting character development and a great plot that keeps you hooked from start to finish.
A Naruto and Mikoto time travel fanfiction can be really interesting. It might involve Naruto going back in time and interacting with Mikoto in ways that change the course of the Naruto universe. For example, Naruto could use his knowledge from the future to prevent certain tragedies or help Mikoto in her life. This could lead to new alliances and different character developments. It also gives the author a chance to explore different relationships and plot twists that were not possible in the original storyline.