One interesting plotline could be Naruto going on a mission to Kumogakure and getting involved with multiple Kumo ninjas in a friendly way that gradually turns into a harem situation. For example, he might help them with a local threat and in the process, they all develop feelings for him.
A possible plotline is that Naruto is sent to Kumogakure to negotiate some important treaties. While there, he gets to know the different aspects of Kumo culture. He befriends a number of Kumo ninjas, both male and female. However, the female ninjas find him especially charming. As time passes, a harem - type relationship starts to form as they support Naruto in his diplomatic efforts and in his personal growth within the village.
One interesting plotline could be Naruto joining the Kumo village and having to adapt to their different ninja techniques and traditions. He might face challenges from the Kumo ninjas who are initially suspicious of him.
One possible plotline could be Naruto going on adventures with Hana and other members of the harem, facing new enemies together. Maybe they have to protect their village from a mysterious threat while also dealing with the complex relationships within the harem.
One interesting plotline could be Naruto being transported back in time to when Kushina was young and him having to navigate a harem situation while also trying to change the future for the better. Another could be an alternate universe where Kushina is in a position of power and Naruto has to win her over among a group of suitors in a harem-like setting.
A common plot in Naruto x Yugito N of Kumo fanfiction is a love story. Naruto, being the main character, often has his charm and Yugito N is attracted to him. They might start off as friends, but as they spend more time together, feelings develop. It could also be set in a time of peace between the villages, allowing them to freely interact. In some stories, they might face opposition from their respective villages due to their relationship, adding a layer of drama to the plot.
One possible plotline could be Naruto finding himself in the Family Guy universe and being pursued by some of the female characters there, creating a comical and chaotic harem situation. For example, Lois might be intrigued by Naruto's ninja skills and his different worldliness, leading to some humorous interactions.
Naruto is a given in this fanfiction. In Kumogakure, Mabui could be part of the harem. She is intelligent and in charge of a lot of important operations in the village. Her relationship with Naruto could start from her helping him with some village - related tasks. Another potential character is Omoi. Although he is male, his interactions with Naruto could lead to the female characters around him taking more of an interest in Naruto, thus contributing to the harem idea.
One interesting plot could be Naruto visiting Kumo and meeting Yugito for the first time. Their initial encounter might be filled with misunderstandings as Naruto's boisterous nature clashes with Yugito's more reserved Kumo upbringing. Another plot could involve them teaming up on a mission. Maybe they have to protect a sacred artifact that is important to both Konoha and Kumo. This would force them to work together, learn about each other's strengths and weaknesses, and gradually form a bond.
One possible plotline could be Naruto being transported to the Arrow universe and attracting the attention of various female characters. Maybe he uses his ninja skills to help them in their battles against villains in Star City, and in the process, romantic interests start to develop.
Another plotline could involve the female characters in the harem having unique powers or abilities that they use to help Naruto in his battles. Maybe one of them has a special healing ability that comes in handy during a tough fight. And as they work together, their relationships deepen.
One interesting plotline could be the female Naruto having to deal with the different dynamics of a harem. For example, she might have to balance the affections of various male characters who are now vying for her attention in a new way. Maybe she uses her ninja skills in unexpected ways to handle the situation, like using her shadow clone jutsu to be in multiple places at once to manage all the relationships.