One possible plot could be that Shisui discovers Naruto living in a difficult situation, perhaps being ostracized in the village. Shisui decides to take him in. He then starts training Naruto in his unique ninja skills. Naruto would grow up with Shisui's values and teachings, and this would change the way he approaches his goals in the ninja world.
Well, in such a fanfiction, it might start with Shisui seeing Naruto's loneliness. Shisui, being a kind - hearted and strong shinobi, feels a connection with Naruto. He adopts Naruto and becomes like a father figure. This could lead to Naruto having a different set of friends and allies as he's now under Shisui's influence. He may also learn about the Uchiha clan's secrets and use that knowledge in his future battles.
One possible plot could be that Shisui imparts his unique Sharingan - related skills to Naruto. For example, he might teach Naruto how to predict opponents' moves better, just like how the Sharingan can analyze the flow of chakra and movements. This would give Naruto an edge in battles, especially against strong opponents who rely on speed and deception.
One possible plot could be that Naruto discovers he has Shisui's eyes through some sort of ancient Uchiha ritual or curse that was unknowingly transferred to him. Mikoto could be the one who reveals the truth about his newfound powers. Then Naruto has to learn to control the Sharingan while also dealing with the Uchiha clan's secrets that Mikoto is aware of.
One possible plot could be that Ino is in a situation where she needs to quickly gain Shisui's attention or stop him from doing something. Straddling him might be a very bold move on her part in the heat of the moment. Maybe they are in the middle of a battle or a dangerous situation where she uses this tactic as a last - ditch effort to communicate or make him listen.
In this fanfiction, a really interesting plot twist could be that the training by Shisui actually awakens a dormant power within Naruto that has nothing to do with the Sharingan at first glance. As Naruto delves deeper into the Sharingan training, he starts to notice connections between this new power and the Sharingan. Maybe it's a power related to the Sage of Six Paths that gets activated in a unique way due to the Sharingan training. Also, the relationship between Naruto and Shisui could take an unexpected turn. Instead of just a teacher - student relationship, they could become something like comrades with a shared mission that is revealed during the training process.
One possible plot could be that Naruto accidentally travels back in time and meets Shisui. Shisui, seeing Naruto's potential, decides to train him in some of his unique jutsu. This would give Naruto an edge in his future battles and also a new perspective on the Uchiha clan.
In a 'naruto adopted by hiruzen fanfiction', the plot could involve Naruto having a closer bond with the older generation of shinobi. Hiruzen would surely introduce Naruto to his trusted comrades. Naruto could learn unique jutsu from them. Also, his growth as a ninja would be different. Instead of seeking attention through pranks, he might focus more on living up to Hiruzen's name. His relationship with Sasuke could also be affected. Maybe they would become rivals in a more positive way, with Naruto having a stronger sense of family and purpose because of Hiruzen's influence.
Well, perhaps in this 'naruto adopted by grayfia fanfiction', Naruto's own world is in chaos and he gets lost in a portal that leads him to Grayfia's realm. Grayfia sees Naruto's potential and loneliness. She adopts him and starts to train him in the ways of her world. Naruto could struggle at first, but his determination from his ninja training helps him. He might get involved in local disputes or power struggles in Grayfia's world and use his unique abilities to make a difference.
If Naruto was adopted by Tsunade in fanfiction, he would probably be exposed to a different set of values. Tsunade is a strong - willed and sometimes reckless woman. Naruto could pick up on her fearless attitude towards battle and also her more practical approach to leadership. Also, their relationship might change the power dynamics in the village a bit, as Naruto would be directly under Tsunade's wing.
Well, one possible plot could be that Naruto, being adopted by Yugito, would learn a lot about the Nibi (Two - Tails) from her. Yugito could train Naruto in unique ways that combine the skills of Konoha and her own special techniques related to the tailed beast. Naruto might also gain a new family - like bond with Yugito, which could help him deal with his own feelings of loneliness from his past.
Well, one possible plot could be that Naruto is somehow transported to the Star Wars universe. The Jedi sense his strong force potential within him, which is similar to his chakra in his own world. They decide to adopt him and train him in the ways of the Jedi. He might struggle at first with the different concepts and rules, but his determination from his ninja training helps him adapt quickly.