Naruto: Blade of the Sharingan

The Uchiha clan, who traveled through time and became the world of Naruto, has no system, no golden fingers, and no fate for the protagonist to have a strong master. In the end, he was hunted down by Genbe and Weasel on the night of genocide. After awakening the Mangekyou, he escaped to the world of Demon Slayer: Kimetsu no Yaiba. After learning the breathing method, he experienced ninety-nine and eighty-one difficulties and finally became a strong man. What, Mu Dun? I learned... Flying Thunder God? I can figure it out just by looking at it... Weird punch? Come on, come on, let me hit your chest with my little fist... "I'm not a genius, I'm just a cheating time traveler." This is a unique Uchiha. Are you tired of seeing the same eye legends? Let's take a look at using a knife for a change... [PS, this book is about the world of Demon Slayer and Naruto. Whether it is powerful or not does not depend on the technique itself, but on the person. It kills decisively, with a bit of sinister undertones. It is not a holy mother, nor a harem]