I Only Developed a Ninjutsu, So Why Are All the Kage Panicking?

I transmigrated and, somehow, became Naruto.

I was bound to a Ninjutsu Development System.

From then on, Naruto took a path unlike anyone else's: developing ninjutsu!

Orochimaru: "When it comes to forbidden jutsu, I'm no match for Naruto!"

Tsunade: "This is medical ninjutsu? Th-this is definitely forbidden jutsu!"

Jiraiya: "Naruto, do that forbidden jutsu you just used, the '...' one, again!"

Kurama: "Naruto, I'm begging you, let me collect rent, will you..."

Then

Kurama pleaded: "Naruto... stop already! I'm about to be completely drained. Are you sure this is just an ordinary forbidden jutsu? There's no way I can afford this rent!"

Countless years later, the ninja war was about to begin!

Naruto conjured a forbidden jutsu with his bare hands, and everyone fell to their knees!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.