It's not common. Naruto and Kakashi have a specific relationship in the Naruto universe. Kakashi is like a teacher to Naruto. Fanfictions usually build on the pre - existing relationships and storylines. So the idea of Kakashi killing Naruto is quite out of the ordinary. But some might write such a fanfic to create shock value or to explore a 'what - if' scenario in a very different way.
It's a rather unique concept. In the original Naruto series, Kakashi is a mentor figure to Naruto. The idea of Kakashi killing Naruto goes against the general bond and narrative. So in fanfiction, it's not a common theme as most fanfics tend to follow the positive relationships from the original. However, it can attract those who like exploring dark or alternative storylines.
This is a very unique concept in the Naruto fanfiction world. Usually, fanfictions revolve around the development and growth of characters based on the original story. Naruto and Kakashi have a positive relationship where Kakashi helps Naruto grow. So a fanfiction where Naruto is killed by Kakashi is against the norm. It might be created by those who want to break the traditional narrative and explore extreme emotional and plot - twisting scenarios.
A practical answer is Chapter 3, because it turns the idea into a concrete scene. The chapter opens with Qiao was still annoyed at the attitude of this unknown girl when she heard..., adds pressure through So without a second thought, she blurted out a fierce challenge, "Fine, if..., and ends on.
Chapter 505, ""Postpartum Care for Sows", is the clearest early answer because it turns Shang Shaobai's situation into a concrete plot event.
Chapter 852, "Could That Be an Aphrodisiac Spell?", is the clearest early answer because it turns Rong Junsheng's situation into a concrete plot event. It opens with Rong Junsheng's words startled Shi Lei and Rong Kexi.
Chapter 754, "Evil Can Never Defeat Justice", is the clearest early answer because it turns Fang Wenzhe's situation into a concrete plot event. The chapter gives readers a real answer by opening on After the court trial ended, everyone immediately threw a party for...
Chapter 565, "Our Homeroom Teacher Isn't As Twisted As You!", is the clearest early answer because it turns Ai Xiaochun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with After the ingredients were delivered, Chen Manman handed them all...
Chapter 885, "Isn't This Wine?", is the clearest early answer because it turns Isn's situation into a concrete plot event. The chapter turns that into something concrete by moving from Daoist Shuiyun's words weighed heavily on Jiang Li's heart like a...
Chapter 682, "Too Conspicuous to Keep Around", is the clearest early answer because it turns Gu Yu's situation into a concrete plot event. It opens with Taking advantage of the still-open elevator doors, Su Yinwan quickly...
Chapter 813, "She Has a Child?!", is the clearest early answer because it turns Meng's situation into a concrete plot event.
Chapter 923, "Eight-legged essay?!", is the clearest early answer because it turns Miss Rong's situation into a concrete plot event. A useful checkpoint is the way the scene starts with I just went to her house for a meal, even if my relationship with my...
Chapter 736, "When Will You Come to My House for Dinner?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Walking outside the tent, Zhao Lang waved his hand.