I'm not entirely sure specifically as it could vary greatly. 'Sasunaru' likely refers to a relationship between Sasuke and Naruto in a fan - created context. 'Abused' in this title might suggest a dark or difficult situation within the fanfiction, perhaps one character is being mistreated by the other in some way, but without reading it, it's hard to be more precise.
He might be shocked. In the fanfic, if he sees things like his friends' future achievements or the new threats that emerge, it would surely startle him. For example, if he discovers that one of his friends has a family of their own and has become a great leader in the village, he would be proud but also a bit surprised at how much has changed.
It could be that in the fanfiction, Naruto's character is developed in a way that Sakura, within the sasunaru concept, doesn't approve. For instance, if the fanfiction makes Naruto too weak or too different from his original self. Also, if the fanfiction focuses too much on certain relationships that she doesn't like, she would hate it.
One great Sasunaru Naruto fanfic is 'A Bond Beyond Comprehension'. It beautifully explores the deep relationship between Sasuke and Naruto. The story has amazing character development and the plot keeps you hooked from start to finish.
In some Sasunaru fanfictions, Sakura might hurt Naruto emotionally. For example, if she chooses Sasuke over Naruto in a very cruel way, it can break Naruto's heart. She could say mean things about his dreams or his past as an orphan, which would deeply wound him.
With his usual determination. Naruto has always been one to face difficulties head - on. So, even if he's shocked by what he sees in the fanfic's future, he'll likely try to find solutions immediately.
It could mean that in the sasunaru (presumably a relationship concept within the Naruto fandom) context, the character Sakura has a dislike for Naruto fanfiction. Maybe it's because the fanfictions often deviate from the original story in ways she's not fond of.
You could try looking on some well - known Naruto fanfiction websites. But keep in mind that content with themes like 'abused' can be quite heavy and might not be in line with your expectations. AO3 has a vast collection of Naruto fanfictions, so you might search there. But you need to be cautious as this type of content can be triggering for some people. Additionally, some smaller Naruto - focused fanfic communities may also have such works, but they may have their own search mechanisms.
One popular one could be 'The Bond Beyond Battle'. In this fanfiction, Sasuke's decision to save Naruto is driven by a deep understanding of their shared past and the unspoken bond between them. It beautifully portrays Sasuke's internal struggle and his ultimate choice to put Naruto's life above all else.
One possible fanfic idea could be that Sasuke discovers Naruto's abuse by the villagers early on. Sasuke, having his own dark past, feels a sense of kinship. He starts to protect Naruto in secret, which gradually evolves into a deeper bond between them. This could lead to them training together more intensely, not just to become stronger but also to find a sense of belonging in each other.