In the Hokage World, Starting with Rin

Ye Li, a twenty-first-century assassin, accidentally transmigrated into Naruto.

"Ding-dong! The 502 System is at your service. You can open the System Shop to buy weapons!"

Ye Li: "Holy crap, firearms! If I had a modern weapon in Naruto, I could mow down all those little nobodies!"

Hiruzen Sarutobi: "What kind of weapon is this? It's incredibly powerful."

Ye Li: "An AK-47!"

Obito said, "This thing is way more useful than ninjutsu!"

Madara said, "Hashirama, times have changed!"

Years later, when the Otsutsuki invaded the Shinobi World, they were stunned.

Anti-Otsutsuki armor is activating…

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