Well, it could involve Naruto and Rias from different universes somehow meeting. Maybe through some sort of magic or interdimensional rift. They would start off as strangers, with Naruto being his energetic and determined self from the ninja world, and Rias being the powerful devil she is. Their love story might begin with a misunderstanding that they gradually clear up as they get to know each other's true natures. They could face challenges together, like Rias's devil duties conflicting with Naruto's ninja code. But through it all, their feelings for each other would grow deeper.
Well, it could start with Naruto finally realizing his deep feelings for Sakura. Maybe after a dangerous mission where he almost lost her. He might then start to court her in his own Naruto - like way, bringing her ramen and always being there to protect her.
Well, it could involve Naruto characters being thrown into the Highschool DxD universe and having some sort of conflict with Rias. Maybe Naruto's skills and values clash with Rias's actions or leadership in the story. For example, Naruto might see her as too power - hungry or not treating her underlings fairly.
The fanfic could also be centered around a character who is in possession of the Kubikiribocho and Naruto has to face off against them. It could explore themes like power, loyalty, and the consequences of using such a powerful weapon. There might be moral dilemmas for Naruto as he decides how to deal with the wielder of the Kubikiribocho.
Well, it could show their relationship growing from Hinata's shy admiration in the beginning. Maybe it would include the moments when Naruto starts to notice Hinata's feelings, like when she protected him during the Pain arc. It could also explore how they build a life together after the war, with Naruto as Hokage and Hinata as his supportive wife.
It could involve exploring the power of Madara's eyes in unique ways. Maybe the fanfic could show how someone else in the Naruto universe gets a taste of the power of Madara's eyes and how it changes their perspective and abilities. For example, a young ninja might accidentally gain some of the abilities related to Madara's eyes and has to learn to control it while facing various challenges in the ninja world.
Well, in this fanfic, the godlike Naruto might have a special relationship with Yasaka. They could be on a quest to bring peace between different factions. Since Naruto is godlike, he could use his power to resolve conflicts easily. Yasaka, on the other hand, could provide her knowledge of the world and her own powers to support Naruto. Their story could involve exploring new lands and facing mythical creatures.
One possible plotline could be that Naruto has his own mission or purpose that is in conflict with Rias's plans or the world she is a part of. So, he decides to leave to pursue his own goals. For example, he might need to go back to the Hidden Leaf to protect it from a new threat that only he can handle. Another could be that Naruto discovers some dark secret about Rias or her group and can't stay with them any longer. He values his own moral code too much to be associated with something he deems wrong.
In a Juubi Naruto meets Rias fanfic, the plot might revolve around a tournament. Naruto is invited to participate in a supernatural tournament in Rias's world. As the Juubi Naruto, he has incredible power which draws a lot of attention. Rias becomes interested in him not just for his power but also his sense of justice. They form an alliance during the tournament and face various challenges together, learning from each other's fighting styles and strategies.
It could show them feeling proud of Naruto's achievements. For example, when Naruto becomes Hokage, they might be seen with tears of joy in the fanfic.
Perhaps Naruto is transported to Rias' world through some sort of magical or dimensional rift. He then stumbles upon Rias in a dire situation and uses his ninjutsu like the Flying Raijin to quickly reach her and get her out of harm's way. This would be an exciting start to their interaction in the fanfic.