Another plotline could be the relationship between Naruto and Kakashi growing deeper. Maybe Naruto faces a personal crisis and Kakashi has to use his own experiences to guide Naruto through it. This could show a more emotional side to their master - apprentice relationship.
Perhaps a storyline where the apprentice discovers a new jutsu and has to keep it a secret while they master it. They could struggle with whether or not to tell Kakashi, fearing disappointment if they fail. This adds an element of internal conflict.
Perhaps a storyline where the apprentice gets involved in a mission that was originally meant for Kakashi. This could lead to the apprentice having to prove themselves not only to their teammates but also to Kakashi. They might encounter powerful enemies and have to use their wits and the skills they've learned from Kakashi to survive. In the process, they could also discover some secrets about Kakashi's past that helps them better understand their master.
Perhaps a plot where Naruto, as Jiraiya's apprentice, goes on a secret mission with him to spy on a hidden enemy organization. During this mission, he has to use his wits and the skills Jiraiya taught him to stay alive and gather information.
One possible plotline could be Kakashi teaching Naruto some super - advanced jutsu that Naruto then uses to surprise his friends in a sparring match. For example, Kakashi might teach Naruto a special lightning - style jutsu that Naruto masters and combines with his Rasengan.
In some fanfictions, there could be a plot where Naruto and Kakashi get transported to a different dimension. In this strange new world, they have to find their way back home while facing various challenges. Along the way, they learn more about their own strengths and weaknesses and how their partnership is crucial.
Perhaps a plot where Naruto's determination in the face of some sort of 'heat' - like a difficult situation in the village, and Kakashi is there to guide him. It could involve Naruto learning new jutsus under Kakashi's tutelage while also dealing with his own growing pains.
Well, in some 'kakashi teaches naruto fanfiction', there might be a plotline where Kakashi teaches Naruto how to better control his chakra. This could involve some really intense training sessions deep in the forest. Also, Kakashi could be teaching Naruto about the art of stealth and infiltration, skills that Naruto doesn't have much experience with but are crucial for a ninja.
Well, in this fanfic, perhaps there's a plotline where the apprentice discovers a long - lost ninja art and Kakashi helps them develop it. This could lead to the apprentice becoming a key figure in the village's defense against a new threat. Or it could be about the apprentice facing personal challenges, like dealing with self - doubt, while Kakashi tries to instill confidence in them through various training methods.
One possible plotline could be that Kakashi arrives just in time to save Naruto from a powerful enemy's ambush. He uses his Sharingan to predict the enemy's moves and counter them effectively, allowing Naruto to escape unharmed.
Perhaps a plotline where Kakashi and Iruka have to protect Naruto from the Akatsuki. They train Naruto intensively to prepare him for any potential attacks. At the same time, they try to keep Naruto's identity as the Jinchuriki of the Nine - Tails a secret from the Akatsuki members who are after his power.