A plot could involve Tsunade and Jiraiya in their younger days. Maybe they both had a crush on each other but were too shy or focused on their ninja training to admit it. As they grow older and more experienced, their feelings resurface. Tsunade might start to notice how Jiraiya has always been there for her, through her losses and tough times, and this realization blossoms into love.
A fanfiction could depict their married life as a blend of adventure and domesticity. They could go on missions together, using their combined skills to defeat enemies. At home, they would enjoy simple pleasures like cooking together (even if Jiraiya is not a very good cook) and sharing stories of their day. Their relationship would be a balance of their individual personalities and the love they have for each other.
Well, perhaps there could be a plot where they both get trapped in a mysterious dimension. In this dimension, they have to rely on each other's skills. Jiraiya's knowledge of sage mode and Orochimaru's various jutsu could be combined to find a way out. It could also explore their relationship in a more in - depth way as they face different challenges together.
Maybe there's a situation where Jiraiya writes a novel that Tsunade reads. In the novel, he describes a love story with a kiss that is clearly inspired by his feelings for her. Tsunade, touched by this, confronts him and then they share a kiss. This could lead to a series of events where they have to deal with their new - found feelings in the context of the ninja world, with all its politics and rivalries.
One interesting storyline could be a mission where Naruto, Jiraiya and Tsunade are forced to work together. Naruto learns a lot from Jiraiya's combat techniques and Tsunade's medical knowledge. Another could be a story set in the past, showing how Jiraiya and Tsunade interacted when they were younger, and how Naruto's presence in the present changes their relationship dynamic. A third could be a story where they face a powerful enemy together, and Naruto has to use his newfound skills under the guidance of Jiraiya and Tsunade to defeat the foe.
One idea could be that they accidentally find out they're expecting during a mission together. Maybe they had a one - time moment of closeness before and now have to deal with the unexpected pregnancy. This could lead to a lot of drama as they both have important roles in their village and their relationship has always been complex.
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 possible plot could be that after years of adventures and unspoken feelings, Jiraiya finally decides to settle down. He proposes to Tsunade in a very Jiraiya - style, perhaps writing a novel about their story and presenting it to her. Tsunade, who has always had deep feelings for Jiraiya despite their bickering, accepts. Their married life could be filled with Jiraiya still going on occasional missions while Tsunade manages the village, and they have to navigate the challenges of being in a relationship while having important responsibilities.
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.
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.