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.
Often, the theme of redemption can be present. Maybe Naruto travels back in time and tries to prevent some characters from making bad choices. Also, the exploration of different timelines is a common theme. He could see how different decisions in the past would have affected the future of the Naruto world. This can lead to a lot of interesting plot twists and turns.
One great Tobirama time - travel fanfiction is 'Tobirama's Second Chance'. In this story, Tobirama travels back in time and uses his knowledge to prevent some of the future tragedies in the Naruto world. It's really interesting to see how he interacts with the past versions of the characters.
One idea could be that Naruto travels back in time and meets the Shodaime. He could learn about the founding of the village directly from him. Maybe Naruto helps the Shodaime in some way, like dealing with early threats to the village that were not well - documented in history.
In a Naruto and Kushina time travel fanfiction, their relationship dynamics would be fascinating to explore. Kushina could see Naruto as he is now, a powerful ninja, and Naruto would get to experience his mother's presence in a new way. They might team up to train together, with Kushina teaching Naruto some of her unique Uzumaki techniques that were lost over time. This could lead to Naruto becoming even more powerful and having new skills to face his enemies.
There are many Naruto fanfiction platforms where you can look for such stories. For example, FanFiction.net. You can search for 'Naruto x Mikoto time travel' in the search bar and then skim through the results to find the ones that don't have inappropriate content. Usually, the summaries or tags can give you a hint about the nature of the story.
If they travel together through time, their relationship becomes more of a partnership. They have to rely on each other in a different time period. This shared experience of exploring different eras and facing challenges together can make their bond even stronger. They might discover new things about each other that they never knew before, like Naruto finding out how brave and resourceful Himawari can be in a completely unfamiliar situation.
In time travel fanfiction, if Jiraiya goes back, it can have a huge impact on his relationships. He may be able to save some relationships that were lost in the original timeline. For instance, he could repair his broken friendship with Orochimaru. Regarding his relationship with Naruto, if he travels back to Naruto's childhood, he can be a more effective teacher and friend. This could lead to Naruto trusting him even more. And if they travel back together, they rely on each other more in the different time period, which enhances their bond.
If Minato time - travels, it could change a lot. For instance, if he prevents the Nine - Tails attack, Naruto would grow up in a very different environment. He might not be the underdog he was in the original story. Also, if Minato changes things during the Uchiha clan's situation, Sasuke's story would be completely different. Konoha's political situation would also be altered. There would be less animosity between different clans perhaps.
Another interesting one could be 'Naruto's Time - Twisted Bond'. Here, Naruto's time travel creates a complex situation where he and a certain male character develop a yaoi relationship. The author does a good job of weaving in the time travel elements with the new relationship dynamics. It also explores how Naruto's knowledge of the future affects his actions in the past regarding this relationship.