A plot could involve Naruto getting injured and Tsume taking it upon herself to nurse him back to health. During this time, they share stories from their pasts, and Naruto learns about Tsume's early days in the ninja world, which changes his perspective on her.
Perhaps a fanfiction where Tsume discovers Naruto has a hidden power that only she can help him control. This could lead to a series of training sessions between them and a growing bond as they face the challenges that come with this new power.
One idea could be a story where Naruto, Tsume, and Hana are on a mission together. They encounter a powerful and mysterious enemy that forces them to rely on each other's unique skills. Naruto's Rasengan combined with Tsume's claw - based attacks and Hana's medical ninjutsu could make for an exciting battle sequence. Another plot could involve a competition among the three in a ninja tournament, with each having their own reasons for wanting to win, like Naruto to prove himself, Tsume for the honor of her clan, and Hana to show her growth as a ninja.
One idea could be a story where Naruto and Tsume go on a mission together in an unknown territory. They face various challenges and have to rely on each other's skills. Naruto's optimism might contrast with Tsume's more serious nature, creating an interesting dynamic.
Well, a plot could revolve around Tsume and Naruto getting married in secret at first. Because of Tsume's position in the Inuzuka clan and Naruto's status as a hero, there could be political implications. Their secret marriage could be discovered, and they'd have to deal with the fallout. Maybe some clans would be against it, while others would support them. Also, they could go on a journey together to find a lost Inuzuka technique that was thought to be extinct. During this journey, they'd grow closer and learn more about each other's pasts, which could strengthen their relationship.
One idea could be that Tsume teaches Naruto some special Inuzuka clan techniques for tracking. Naruto, always eager to learn new skills, would be a great student. This could lead to them going on a joint mission to track down a powerful enemy who has been causing trouble in the Hidden Leaf Village.
A plot could revolve around Sesshomaru being intrigued by Naruto's determination. Sesshomaru decides to train Naruto in some of his own combat techniques, which Naruto adapts to his own fighting style. In return, Naruto shows Sesshomaru the value of friendship and loyalty within a village. This could lead to Sesshomaru having a change of heart about his own solitary ways. Also, they could team up to face a common foe from Sesshomaru's world that has somehow entered the Naruto universe.
One idea could be that Naruto and Kashuina meet during a mission outside of Konoha. They start off as rivals, constantly trying to outdo each other in combat skills. But as they face various challenges together, they gradually develop a mutual respect and then deeper feelings. Another plot could be set in a post - war scenario where Naruto, now a hero, meets Kashuina who has a unique ability to heal the psychological scars of the war - torn ninjas. Their interaction then leads to a romantic relationship. And a third idea is that they are both students under a new sensei who pairs them up for special training. During this training, they discover things about each other that they never knew before and fall in love.
One idea could be Naruto being sent to the world of Death Note. He could use his ninja skills to try and outwit Light Yagami. Maybe he would initially be confused by the Death Note's power but then use his determination to stop Light from his killing spree. Another plot could involve Naruto meeting the Shinigami. He might learn about the balance between life and death in this new context and try to find a way to bring some of his ninja world's values to this strange new world.
Perhaps Naruto and Lala meet during a mission where Naruto is sent to a different dimension. Lala, being from an alien world, is intrigued by Naruto's determination and they form an alliance to face a common enemy in that dimension. Their different powers and abilities complement each other, and as they work together, they start to develop feelings for each other.
A more complex plot could be that there is a prophecy in both worlds about a union between someone from the Naruto universe and someone from Ruby's universe. Naruto and Ruby are the ones fated to fulfill this prophecy. They initially don't get along but as they face various challenges together, they start to understand each other and fall in love, while also saving both their worlds in the process.
In a naruto x avatar fanfiction, there could be a scenario where the Akatsuki from Naruto's world teams up with some of the villains from the Avatar world. This would force Naruto and the Avatar (whichever one it may be) to put aside their differences and form an alliance with other characters from both worlds to stop this powerful and evil coalition.