Naruto: I, Sasuke, Have Heaven-Defying Comprehension!

(A lighthearted, entertaining story)

After transmigrating to the Naruto world, he becomes Sasuke just before the genin exams, and from the start gains a max-level comprehension talent.

With his heaven-defying comprehension, he breaks through the limits of ninjutsu and creates countless incredible abilities using a modern way of thinking.

"Your comprehension is unbelievably exceptional. By visualizing and experiencing it firsthand, you derive the ninjutsu technique: Great Lightning Fireball!"

"Your comprehension is unbelievably exceptional. By visualizing and experiencing it firsthand, you grasp and derive the ninjutsu technique: Five-Element Shadow Clone Technique!"

"Your comprehension is unbelievably exceptional. By observing a Tailed Beast Bomb, you derive the ninjutsu technique: Susanoo Magatama!"

"Your comprehension is unbelievably exceptional. By visualizing the power of the Sage of Six Paths, you upgrade your Rinnegan: Ultimate Six Paths Rinnegan!"

Naruto Uzumaki, after becoming Hokage: "I'll never be able to measure up to him in my lifetime."

Madara Uchiha, the Sage of Six Paths: "I fought Sasuke Uchiha. It's not that I lost. I just ceased to exist."

Posterity praises him: "The youngest Eminence in Shadow, he defeated a legend and ruled this world like the Sage of Six Paths himself returned to life."

Sasuke, standing at the pinnacle of the ninja world and revered and feared by all: "Sorry, it's not that you were born at the wrong time. My comprehension is just a tiny bit better, that's all."