My Super Proficiency System

As a modern otaku who is well-versed in manga, he unexpectedly travels to the world of the Magic Ninja Manga and becomes the big brother-in-law who is destined to sacrifice himself for the protagonist in the future world war.
How can he be willing to be controlled by fate!

He awakens his proficiency system and crazily masters all kinds of ninjutsu!

You say the protagonist invented the Wind Release Rasengan? Watch my new technique - Wind Release Backlash Wave! The Lightning Release is integrated into the Eight Trigrams Sixty-Four Palms, even Kakashi can only stand aside!

I, Neji, will never die!