Naruto: A Killer's Beginning, I Don't Eat Beef

[Naruto + Protagonist Ruthless + I Don't Eat Beef System + Battle Action + Slaughter Konoha + Fun Story] You may have seen the blonde talk-no-jutsu Naruto, but you've probably never seen the black-haired killer genius Naruto, right?... The King of Assassins from Blue Star reincarnates as Naruto, accidentally devouring the original soul, perfectly compensating for all of Naruto's physical defects. From then on, Naruto's body evolves into a super genius! During the three years with Jiraiya, his strength surpasses Jiraiya's! Finally, the three-year period is over. Naruto returns to Konoha with terrifying power and killing intent, and unexpectedly awakens the I Don't Eat Beef System! As long as he makes others feel pain, he receives rewards! So, let's first make Konoha feel the pain, then sweep across the entire ninja world!...

White-clothed Sasuke: Damn it! Naruto, what exactly did you go through these three years? Why can you one-shot me!

Sasori of the Red Sand: How strong is he? Even my last scroll is useless...

Deidara: My C4 Karura, in front of Naruto Uzumaki, is really just a starfish!

Nagato, Itachi Uchiha: Impossible! Your eyes can devour our dojutsu and even claim them for yourself!

Obito: Bastard! Bastard! He even transformed into Rin to trick my feelings!

Madara Uchiha: Is this the prodigy of the new era? He even stole my Susanoo!