He may try to understand Boruto's reasons. Naruto has always been one to look for the good in people. So, even when hurt, he might give Boruto the chance to explain himself. He could say something like 'Boruto, I know you didn't mean it. Let's talk about what's wrong.' He'll be patient and try to resolve the issue rather than getting angry right away.
Well, in certain fanfictions, Boruto may physically harm Naruto in a moment of being influenced by dark forces or in a fit of rage. This is often used to create high - drama situations. Maybe he's tricked into believing Naruto is a threat to something he holds dear, like his friends or the village, and so he takes action against him without realizing the truth.
Naruto could also react with anger. He's not one to just take things lying down. If Sakura hurts him, he might lash out verbally. He could say things like 'I've always been there for you, and this is how you treat me?' expressing his frustration and pain. And then he might storm off, leaving Sakura to realize the impact of her actions.
He might be initially shocked. Naruto is used to thinking of Hana as an ally, so if she hurts him, it would be unexpected. He could immediately try to get some distance to assess the situation and figure out why she did it.
In some cases, Naruto could be deeply hurt and withdraw from Hinata. He might question their relationship and whether he misjudged her all along. If the hurt is physical, he may also be more cautious around her in future interactions. For example, if she accidentally used a strong jutsu on him during training, he might be hesitant to train with her again without proper precautions.
He might be shocked at first. Naruto is used to seeing Kurenai as an ally, so being hurt by her would be unexpected. He could immediately ask her why she did it. If it was a serious injury, he might struggle to stay conscious while trying to understand the situation.
He could be shocked at the brutality. Maybe he'll be stunned into silence at first, just taking in all the chaos and destruction.
In other fanfics, Naruto might try to understand Sakura's perspective. He's a very forgiving person, so he could give her the benefit of the doubt and try to figure out what made her act in a way that hurt him. He might think that she had her reasons and try to work through it with her.
Naruto may also try to find a way to forgive. Despite the hurt, he has a big heart. He might think about all the good times they had before and try to understand her reasons. However, this doesn't mean he won't be cautious around her in the future. He could give her a second chance but be more guarded, waiting to see if she'll hurt him again.
Naruto might feel a sense of responsibility. He would see it as his duty to help Boruto understand and control the Jougan. So, he could start to create special training regimens for Boruto. These regimens would be designed not only to strengthen Boruto's physical and ninja skills but also to help him master the unique powers that come with the Jougan. He would also teach Boruto about the importance of using such power for good and protecting the Hidden Leaf.
Boruto might be in awe. He would probably look at Naruto with wide - eyed wonder, realizing just how powerful his father is.