As you know, in the Naruto world, Kaguya has caused more destruction and damage than anything else. All the Zetsu that the Shinobi Alliance fought were originally humans from Kaguya's era. In this fanfic, when Naruto, Sakura, and Sasuke fought Kaguya, Naruto considered the possibility of her breaking free in the future. When Zetsu released Kaguya, her seal had weakened, and in 250 years, it would have broken by itself. Realizing this, Naruto decided to seal Kaguya within himself, even if it meant becoming an enemy of the Shinobi nations, Konoha, and leaving behind some friends.

[Spoiler-Corrupt konoha,corrupt Elemental Nation,corrupt Kakashi,etc]