Muyetun

Bai Yan's soul traveled to Hokage, and his body and soul were incompatible. The original soul did not disappear, and his own soul was sucked out. The situation is worse than Orochimaru, and the fact of two souls in the body was discovered by the Sandaime... This is a time traveler who travels to Konoha as realistically as possible. He does not have omniscience and omnipotence, and his analysis will sometimes make mistakes. He may not even have the strength to protect himself, but he will not abuse his master. This is a newcomer's first novel, so please take care of it.