Yes, there are such fanfictions in the Naruto fanfiction community. Some fans like to explore unique and creative scenarios in their writing, including this rather unexpected one.
I'm not sure if there is such a specific fanfic. Fanfiction can cover a wide range of scenarios, but cheating themes might not be very common in the Naruto fanfic world, especially considering the strong bond between Sasuke and Naruto. However, with the vast amount of fanfiction out there, it's possible that one exists.
The last scene of the first season of " Celebrating Years " was Yan Bingyun assassinating Fan Xian. This plot was the foreshadowing for the second season. After Fan Xian fell out with the Prince, Yan Bingyun chose to join the Second Prince and assassinate others while Fan Xian was unprepared, thus ending the story of the first season.
The last scene of " Celebrating Years " was Fan Xian and Lin Wan 'er meeting in the temple.
With the help of Wu Zhu, the Shadow, Haitang Duoduo, and the others, Fan Xian successfully eliminated the Second Prince, Eldest Princess, and others, resolving the internal crisis of the Qing Kingdom. Later, he and his wife, Lin Wan 'er, lived in seclusion in a small fishing village by the sea. One day, while Fan Xian was taking a walk by the sea, he suddenly heard the melodious sound of a flute. He followed the sound of the flute to a temple and saw a woman in white. Fan Xian recognized this woman at a glance. She was the Temple envoy he had seen many times in his dreams. She was his sister in his previous life, Lin Yichen. After the two recognized each other, Fan Xian was filled with emotions. He had finally found the person he had been looking for.
Sakura is a very popular character to include. She has a long - standing relationship with both Naruto and Sasuke. Her medical ninjutsu skills can be very useful in various plot situations. Kakashi is also popular. His experience and unique jutsu can add depth to the story. Another popular character is Shikamaru. His intelligence can be a great asset in devising strategies against enemies.
Their relationship would be one of mutual respect. Naruto, as Hokage, would trust Sasuke's abilities as an Anbu member. Sasuke, on the other hand, would respect Naruto's leadership. They would be comrades again, but with a new dynamic due to their different positions in the village.
In such a fanfiction, it could lead to a completely different power dynamic within the ninja village. Maybe Naruto's absence would give rise to new challenges and characters stepping up.
Sorry, as a fan of web novels, my knowledge is limited to the data set I trained, and I can't provide a novel that transmigrated to Naruto and became Naruto or Sasuke. However, I can recommend some similar novels such as Naruto: I am Naruto and Naruto: I am Sasuke. These novels tell the story of the protagonist who transmigrated to the Naruto world to become Naruto or Sasuke and began an unusual adventure.
For novels that transmigrated to Naruto World to become Naruto or Sasuke, you can refer to the following examples:
" Naruto: The Legend of the Nine Tails ": The protagonist is a young man named Li Ming who accidentally transmigrated to the world of Naruto and became the young nine-tailed fox Naruto. In this world, he began to fight against various enemies and gradually grew into a powerful ninja.
2 Naruto Eternity: The protagonist is a young man named Zhang Chen who accidentally transmigrated to the world of Naruto and became the young Uchiha. In this world, he experienced difficult battles with his companions and gradually understood the forbidden technique of the Uchiha clan-Infinite Moon Reading.