Perhaps a plot where Naruto time - travels and meets a younger Mikoto. He then has to navigate the complex world of the past while protecting Mikoto. As he does this, other characters become attracted to him, creating the harem. This could involve a lot of political intrigue and battles against those who oppose Naruto's presence in the past. Also, there could be a lot of character development as Naruto tries to ensure that the future he knows is not changed for the worse. This would also give room for exploring the relationship between Naruto and Mikoto in a different time - setting, and how the other members of the harem fit into this new dynamic.
A really interesting plot would be if there was an alternate reality where Mikoto didn't die and Naruto ended up befriending her in a different way than he did with other characters. Maybe they meet during a time - travel incident and have to work together to fix the timeline. They could learn from each other's experiences and grow closer as they face various challenges along the way. This would involve Naruto sharing his story of being an outcast and Mikoto sharing her knowledge of the Uchiha clan and its secrets.
One interesting plot idea could be that Naruto travels back in time and meets a young Mikoto. He could end up influencing the events that led to the Uchiha massacre in some way. Maybe he tries to prevent it by changing the relationship between the Uchiha clan and the village.
One plot idea could be that Mikoto travels back in time and tries to prevent certain tragedies from happening in the Naruto universe. Maybe she wants to stop the Uchiha massacre, and in the process, she forms a strong bond with Naruto, who is also involved in her efforts.
One idea could be that they travel back to a crucial moment in the history of the ninja world and change some small events that end up having a huge impact on the future. For example, they prevent a certain battle from happening too early, which gives the ninja villages more time to prepare for a bigger threat that was coming later.
One idea could be Naruto somehow finds himself in a situation where he has to team up with Tayuya frequently. As they interact more, a harem starts to form around Naruto, with Tayuya being one of the key members. The plot could involve them going on missions together and Naruto gradually realizing his feelings for Tayuya among the others in the harem.
Well, a really interesting plot could be a fanfiction where Mikoto and Kushina's spirits are somehow able to communicate with Naruto at crucial moments in his life. They give him advice and strength, even though they are no longer alive. Also, a story about how they worked together to try and bridge the gap between the Uchiha and the rest of the village would be fascinating. They could use their influence and relationships to bring about positive change. This would involve a lot of character development for both of them and would show their importance in the Naruto world beyond just being Naruto's mother and a friend's mother.
One idea could be that the OC is a powerful ninja from a far - off land. She comes to Konoha and catches the attention of Naruto and his friends. As she gets to know them better, she forms unique bonds with each of them, leading to a harem - like situation. For example, she might train with Naruto and they share their dreams of becoming Hokage and protecting the village. With Sasuke, she could be someone who understands his pain and tries to bring him back to the light. And with others like Shikamaru, she might engage in strategic battles and discussions, slowly building relationships.
One idea could be that Naruto, with his unique charm and strength, gradually attracts Konan and other characters into his 'harem'. For example, they could go on adventures together, facing various threats in the Naruto universe, and during these experiences, their relationships deepen. Naruto could use his ninja skills to protect them, and they in turn offer different forms of support, like Konan using her paper abilities for strategic advantages.
One idea could be that Naruto is somehow transported to the Overlord world and his unique abilities draw the attention of various female characters, leading to a harem situation. Maybe his ninjutsu skills are seen as a form of magic there.
A possible plot could involve a competition among the members of Naruto's harem. Since they are all in love with Naruto in this genderbend scenario, they might compete in ninja tasks or challenges to prove their worth to Naruto. Maybe there could be a tournament where they show off their jutsu, and Naruto has to judge not only their skills but also how their actions affect their relationships with him.