Naruto: I Slay Demons in the Shinobi World, Immortal and Undying

He transmigrates to Konoha and becomes Sasuke Uchiha.

He thought he would reach the pinnacle of the ninja world just like the original Sasuke.

But he never expected this ninja world to be completely different from the one he knew.

This world has long since been overrun by demons!

The ninja villages have long since become farms for demons!

Humans are nothing but food for demons!

And ninjas are the most prized food of all!

Most terrifying of all, I'm the only one who knows the truth!

Fortunately, he awakens a status panel.

He can spend his lifespan to improve his skill proficiency.

And killing demons lets him increase his lifespan.

Once he discovers this, the terrifying demons no longer seem like man-eating monsters to Sasuke Uchiha.

Instead, they look like precious elixirs of immortality.

First, a modest goal:

10,000 years of life!!!

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.