Naruto: I Am the Great Ape King

The protagonist travels to a war orphan. This body has such a powerful ability. There is a tailed beast living in the body. He studies forbidden scrolls, acquires the spiritual arts of the third generation of the Sarutobi clan, studies cells and other types of things in the ninja hospital, learns Ryūchi Cave Senjutsu, transplants cells from various people, learns Ryūchi Cave Senjutsu, and eventually becomes the pinnacle of the ninja world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.