Fans would likely be divided. Some fans who like exploring unconventional and darker storylines might be interested in such a fanfic. They might see it as a creative exploration of the characters. However, many fans who are loyal to the original relationships in the Naruto series would probably be outraged. They would feel that it goes against the essence of the characters and the positive relationships that were built up over the course of the series.
There would be a lot of shock and disappointment among fans. Naruto and Hinata are a beloved couple, and fans who have followed their story would find it hard to accept such a plot. Many would probably criticize the author for going against the essence of the characters.
Naruto might be heartbroken. He's a very emotional character, so he could cry a lot and feel a deep sense of loss.
I'm not sure if there is such a specific fanfic. Fanfic topics can be extremely diverse, but this particular scenario seems rather untrue to the original Naruto storyline and the relationships established in it. However, in the vast world of fanfiction, almost any idea can be explored, so it's possible that someone might have written it.
Yes, there are likely fanfictions out there with such a plot. Fanfic writers often explore different and sometimes controversial storylines. However, this goes against the strong bond between Sasuke and Naruto in the original series.
One common reaction could be Naruto's shock. In most fanfictions, Naruto is portrayed as someone who deeply loves Hinata, so being cheated on would leave him completely stunned.
He might also become more reserved in future relationships. After being cheated on by Anko, Naruto could be more cautious when it comes to getting close to someone again, always having that fear in the back of his mind that he could be betrayed once more.
One possible plotline is that Sasuke and Hinata are sent on a diplomatic mission to another village. Along the way, they encounter various threats and have to work together to overcome them. This would allow for their relationship to develop as they see each other's skills and personalities up close.
In some fanfics, Hinata might be the one to bring Naruto and Sasuke closer together. Since she has a deep understanding of Naruto's heart and also respects Sasuke's strength, she could act as a mediator between the two. For instance, when Naruto and Sasuke have an argument over a strategic decision during a battle, Hinata steps in to calm them down and find a compromise.
In such a fanfic, Naruto might first feel extreme betrayal. He has always considered Sasuke a close friend or more. If Sasuke cheats on him, he could feel that his world has crumbled. He might initially go into a state of shock, unable to believe what has happened. Then, the thought of suicide could creep in as he might feel that there is no one left to trust or that his life has lost its meaning without Sasuke's loyalty. However, Naruto is also a strong - willed character, so he could also choose to rise above it and prove to Sasuke and himself that he doesn't need such a person in his life.
In the 'naruto is cheated on by hinata fanfiction', it could be that Hinata's own insecurities play a part. She might feel that Naruto is too focused on his ninja duties and not enough on their relationship. So, she could start getting closer to someone who seems to give her more attention. This new connection could be misconstrued as cheating, when in reality she's just seeking emotional support. However, Naruto, seeing her with this other person, would think she's being unfaithful.