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.
A fanfiction about their marriage could explore their past traumas and how they heal together. Jiraiya has his own demons from his past missions and relationships, and Tsunade has lost loved ones. Through their marriage, they could find solace in each other. For example, Jiraiya could comfort Tsunade during her nightmares about losing her brother and lover, and Tsunade could give Jiraiya the stability he always craved. Their relationship would be a journey of growth and mutual understanding.
A possible plot could be that Naruto, under the care of Tsunade and Jiraiya, discovers new aspects of his heritage. Tsunade might know some secrets about the Uzumaki clan that she shares with Naruto. Jiraiya, being his godfather - like figure, helps him explore these new revelations. Meanwhile, the Akatsuki could still be a threat, and Naruto, with his new skills and knowledge, has to fight against them to protect the village and his loved ones.
One possible plot could be that Jiraiya and Tsunade decide to adopt Naruto after seeing his loneliness and potential. They start training him not just in ninja skills but also in life values. Jiraiya might teach him more about the toad sage techniques, while Tsunade could help him with his chakra control and medical ninjutsu knowledge. Naruto would grow up in a more stable family - like environment, which would change his personality a bit, making him more confident and less brash as he has the support and love of two powerful ninjas.
One possible plot could be that Tsunade and Jiraiya are deceived by false information about Naruto. Maybe they are made to believe that Naruto has turned to a dark side. For example, an enemy might have created false evidence of Naruto collaborating with a powerful evil force. Tsunade, being the Hokage, and Jiraiya, Naruto's mentor, would then be forced to take actions against Naruto that seem like betrayal from Naruto's perspective.
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.
One possible scenario in this fanfiction could be that Naruto grows up with a more balanced upbringing. Tsunade might teach him medical ninjutsu and how to control his emotions better. Jiraiya, on the other hand, would surely train him in powerful combat techniques and in the ways of the sage. Naruto would probably be more mature and well - rounded at an earlier age, with a combination of Tsunade's tough love and Jiraiya's adventurous spirit guiding him.
In this fanfiction, their relationship would be transformed. They would be like a married couple in a way, but without the formalities. Jiraiya would probably tone down his womanizing ways as he has a family to think about now. Tsunade would be more open and less prickly around Jiraiya. They would bicker less and cooperate more. Their relationship would be centered around Naruto, and as he grows, they would grow together as a family unit, with their bond getting stronger over time.
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 in a fanfiction, it could be a part of a bet. Tsunade, always the confident one, makes a bet with Sakura. If Sakura can master a really difficult medical jutsu within a short time, Tsunade will give her a special reward. Sakura manages to do it, and Tsunade, impressed and proud, gives her a congratulatory kiss. This would add an interesting dynamic to their relationship in the story.
She could physically harm him. Maybe in a fit of anger, she punches or uses her strength on Jiraiya. Since Tsunade is known for her powerful physical attacks, it would be a likely way for her to hurt him. Another way is through emotional harm. She could reject Jiraiya's feelings for her in a very cruel way, saying things that cut deep into his self - esteem and his love for her.