Gu Dan, who has been fighting for fifty years in the apocalypse and is invulnerable and iron-clad, travels back in time to a book where the protagonist gathers all kinds of harem girls at the beginning. He is so tall and has all his skills maxed out. It is the time when the scenery is endless and the golden light shines. In the third chapter, the protagonist is defeated by the number one girl in the harem, and he dies miserably at the end of the third chapter!