Naruto: the Combat Power at the Beginning Was Off the Charts, Shocking the Audience

Xiaoyao, who traveled to the world of Naruto, got a somewhat strange system. Just read the forbidden book and you will become stronger! Kakashi received the guidance of my forbidden book, and his strength improved by leaps and bounds. It was precisely because of the precious secret books I left behind that he developed the technique of Naruto's harem.