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.
It could be that the fanfiction author has a different view on the characters. They might not be satisfied with the original relationship development in the Naruto series. So they come up with the idea of Hinata cheating on Naruto to show an alternative scenario. For example, they could be trying to show how Naruto would deal with betrayal, which is a very different aspect from the original story where Naruto is mainly about his growth as a ninja and his positive relationships.
Well, in the realm of fanfiction, anything can be written, but it has no basis in the official Naruto storyline. Naruto is portrayed as a loyal character, and his relationship with Hinata is based on deep love and respect. So, the 'naruto cheated on hinata' in fanfiction is just a wild, unfounded idea that some fanfic writers like to explore for the sake of creating conflict in their stories.
Hinata might react with anger. She's a strong - willed character deep down. So she could confront the person who cheated on her head - on. She might yell and express her disappointment and hurt. This would show her growth from a shy girl to someone who stands up for herself.
There could be many interpretations in such a fanfiction. Maybe it shows Naruto's vulnerability in relationships. It might be a way to explore his character deeper by putting him in a difficult emotional situation.
One common plot twist could be that Hinata finds out she was actually set up. Maybe someone was jealous of her relationship and made it look like her partner cheated. This would add a layer of mystery and give Hinata a chance to fight for her relationship.
Ino could be a very complex character in this fanfiction. It's possible that she cheats on Naruto because she has a fear of commitment. Naruto is a very passionate and all - in kind of person, and that might scare Ino. So, to avoid getting too deep into the relationship, she cheats. Or perhaps there's a power struggle at play. She might think that being with a different person would give her more influence or status in the ninja world. And there could be a hidden agenda that she's following, something that she can't achieve with Naruto but believes she can with someone else.
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.
I think Naruto would be heartbroken. He's always been so open and sincere in his feelings. When he discovers Ino has cheated on him, he might go on a bit of a self - discovery journey. He'd wonder what he did wrong, even if it wasn't his fault at all. He could also become a bit more cynical about love, which would be a big change for him. He might start to see the world in a different light and be more guarded in future relationships.