Immortality Begins With Konoha Ninja

"Teacher, does the Sage of Six Paths really exist?"
"Can a ninja also become a sage?"
"..."
Tsunade with golden twin ponytails smiled and looked at the serious inquiry on the face of the newly graduated disciple, sighing in her heart that "he is still a child after all."
...
"The lifespan of the body is too short!"
"Even the Hokage will eventually perish."
"Xiu, you are the only one in the village who can understand me!"
"..."
In order to get the truth, Orochimaru chose to defect from the village and looked at the young juniors who tracked him and continued to bewitch him, with a fanatical look gradually appearing on his face.
...
"Xiu, a ninja is a person who can endure."
"For the ninja world, the child of destiny will eventually change everything!"
"..."
Jiraiya knelt in the rain and roared in pain. He could not believe that the descendants who inherited the will of fire would eventually go on the "wrong path."
...
On the earth illuminated by the blood-colored moonlight, Furukawa Osamu looked at the Taoist Jade that was changing form in his left hand, and then looked at the chakra fruit that he had painstakingly collected in his right hand and smiled with relief:
"...immortality begins here..."
——
Original Furukawa Osamu who unexpectedly came to the ninja world just wanted to live longer.
Just the pursuit of immortality eventually changed the whole world, and this was just the beginning of everything.
PS: The introduction is powerful, and a million words guarantee your character.