A plot could revolve around Minato's spirit guiding Naruto and Tsunade in a difficult situation. For example, there's a mysterious illness spreading in the village and Minato's spirit gives them clues on how to find a cure. Or perhaps a story where Naruto, Minato, and Tsunade are all trapped in a genjutsu - created alternate reality, and they have to find a way to break free while also learning some important lessons about themselves and their relationships.
Perhaps Naruto gets injured severely during a battle and Tsunade has to use all her medical skills to save him. During his recovery, they have heart - to - heart conversations that change their relationship. Tsunade could share her past experiences with Naruto, and Naruto could inspire Tsunade with his unwavering determination. This could lead to a new level of respect and friendship between them in the fanfiction.
One idea could be Minato teaching Naruto how to master the Rasengan at a very young age. Since Minato was the creator of it, he could pass on his in - depth knowledge. Another plot could be Minato protecting Naruto from the early threats that Naruto faced in the original story, like the Akatsuki's early interest in him. Also, Minato could introduce Naruto to the other powerful ninjas of the Hidden Leaf in a more personal way, which would change Naruto's relationships and his standing in the village.
One plot idea could be Minato somehow being brought back to life for a short time and getting to spend precious moments with toddler Naruto. He could teach Naruto some basic ninja skills that Naruto would later forget but unconsciously use in his training. Another idea is a story where toddler Naruto is in danger and Minato's spirit appears to protect him, guiding Naruto to use his own latent powers. And perhaps a story where Minato's memories are transferred to toddler Naruto, giving him flashes of his father's life.
Perhaps Naruto hugs Tsunade when she is about to make a really tough decision for the village. His hug gives her the strength and reassurance she needs to go through with it. It could also be that Naruto, in a moment of celebration after a major victory for the village, hugs Tsunade spontaneously, making her realize how much he has grown and how important he is to the village.
A more character - driven plot could be about Naruto trying to bring Tsunade and Sakura closer as friends. Tsunade is often so busy with her Hokage duties and Sakura is focused on her training. Naruto arranges events that force them to interact more, like a village - wide competition where they have to team up, and through this, they start to understand and respect each other more.
One plot idea could be that Naruto needs Tsunade's medical expertise for a mission. He has to convince her to join him, and during their journey, Tsunade starts to see Naruto in a new light, not just as a rowdy kid but as a capable ninja. Another idea is that Naruto discovers a hidden secret about Tsunade's past and helps her come to terms with it, which deepens their bond.
One idea could be a story where baby Naruto somehow gets a vision of his father Minato's past battles. This would be really cool as Naruto could start showing early signs of his future strength inspired by his dad. Another plot could be Minato coming back briefly as a spirit to protect baby Naruto from some early threats that Kakashi or the Third Hokage might not be aware of.
One idea could be a body - swap situation where Naruto wakes up in Minato's body during Minato's time. He could use his knowledge of the future to change some events and prevent certain tragedies. Another could be Minato taking over Naruto's body for a short time to experience how far the village has come and to give Naruto some hidden power or knowledge that only he could provide as his father.
One plot idea could be that baby Naruto somehow gets lost in the village and Tsunade finds him. She then decides to take care of him for a while, teaching him some basic ninja skills in a very gentle and motherly way. Another could be a time - travel scenario where Tsunade meets baby Naruto from the past and has to protect him from a new, unknown threat. And a third idea is that there's a strange illness in the village that only affects babies, and Tsunade is determined to cure Naruto using all her medical knowledge and skills.
One idea could be Naruto and Tsunade getting stranded on the island and having to work together to survive. They might discover some ancient secrets or powers on the island.