Alternative Naruto World: Post-Apocalypse

What if the Naruto world, specifically the Ninja world, suddenly received uninvited guests from another world? At some point after the Fourth Great Ninja War, after Naruto and Sasuke defeated Madara and Kaguya, peace was achieved. However, the peace did not last long. In the modern era, when forces from a new evil organization emerged, chaos began to unfold. Boruto, Naruto's son, was declared a criminal, while Kawaki, Naruto's adopted son, was seen as a hero. War broke out once again, but this time it was much larger. It was a war of god-like proportions. Despite this, the world was saved once more. However, after the Fifth Great Ninja War, various monsters started appearing from the sky. The sky seemed to crack, and powerful monsters emerged, causing destruction and slaughter. The Five Great Nations tried to survive and accommodate everyone. Hundreds of years passed, but the war against the monsters did not cease. In the end, only five places remained to shelter humans and ninjas from the attacks of the monsters. These were the Five Great Nations. But this is the story of me, Yuya Takeshi! A modern man from Earth who came to this alternative Naruto world! If you want to read ahead of Webnovel, you can read on my Patreon, there are more than 10 chapters there: Patreon.com/Alex_Fabianoki.