Reincarnated and Resurrected from the Dirty Land, but I Am an Undercover Agent!

He is the God of Ninja, the first Kage of Konoha, the teacher of Naruto, the Tongtendai of the Ninja World, and the sternest father of the five great nations... It wasn't until Shang Gongshuo returned from his reincarnation in the dirty land that he realized... How could the old man wearing a Hokage hat in front of him look so much like he backstabbed his own brat? History is written by the victors? No, history is rewritten by those who return.