One possible story is that Naruto got the scar while on a secret mission. He was infiltrating an enemy base alone and got into a fight with a skilled guard. The guard's weapon grazed his eye, leaving the scar. This event could then be a turning point in the mission and Naruto's character development in the fanfiction.
Another story could be that Naruto got the scar in a parallel universe. In this universe, the events are different from the original Naruto story. He might have been in a fight with an alternate version of a well - known character. The fight was so fierce that it left him with the eye scar. And this scar could be a symbol of his journey in this parallel world, differentiating him from the Naruto in the main universe. This would allow for a lot of creative exploration in the fanfiction, like how his relationships and goals change because of this new identity marked by the scar.
In some fanfictions, Naruto might get the scar on his eye during a particularly intense battle with a powerful enemy. Maybe it was a close encounter with a rogue ninja's weapon that managed to leave a mark on his eye area.
It could also be that Naruto sees in Boruto's eye a sign of an emerging danger. The eye might hold a clue to a new enemy or a brewing conflict. Naruto, being the experienced ninja he is, would then start to take precautions and train Boruto more intensively to face whatever this sign in his eye indicates.
One possible consequence could be a change in his fighting style. Without his eye, he might have to rely more on his other senses like hearing and smell, similar to how blind ninja in the Naruto universe adapt. For example, he could focus more on using his chakra to sense the movements of his opponents.
One possible plot development could be that Naruto loses his eye in a battle against a powerful new enemy. This might lead to him having to adapt his fighting style, perhaps relying more on his other senses like hearing and smell. He could also experience self - doubt and a crisis of confidence, but then use this setback as motivation to become even stronger.
One possibility is a story where a person gets a scar from an accident and it leads them on a journey of self-discovery. Another could be a tale of a magical scar that grants special powers or curses. It really depends on your creativity!
One possible plot development could be Naruto using the flowing eye to discover new jutsu. For example, he might be able to see the chakra flow in a different way and create unique attacks. Another could be that the flowing eye attracts the attention of new enemies who want to either steal it or destroy it because they fear its power.
There might be a fanfiction where Naruto's Wrath's Eye is linked to an ancient prophecy. For example, it could be foretold that the one with the Wrath's Eye will either bring destruction or salvation to the ninja world. This creates a lot of internal and external conflict for Naruto as he tries to figure out how to control this power and fulfill a positive destiny. He may have to seek out old sages or hidden scrolls to understand more about the eye.
One consequence could be that his friends might start to suspect him. Since Naruto is usually an open book, hiding something as significant as his eye could make them wonder what he's up to.
One possible plot could be a time - travel scenario. Maybe Simba goes back in time and tries to prevent Scar from becoming evil, and the kiss is a moment of connection that starts this change. Another could be a plot where they are both under a curse that can only be broken by an act of true love, which they discover is the kiss between them.
In some 'eye naruto fanfiction', the focus could be on Naruto getting an eye transplant. Let's say he gets an Uchiha eye in a very unusual way. This would cause a stir in the ninja villages. He would have to deal with the new powers and the potential side effects. At the same time, he would have to face the political implications as some might see him as a threat now that he has an Uchiha's power. He would need to learn how to control the Sharingan's abilities such as the genjutsu and the ability to copy jutsus quickly.