After being unwillingly sealed into Naruto Uzumaki’s body , Kurama continued to have a negative view of humanity. It always opposes and finds ways to take advantage of Naruto’s dependence on his strength to be able to break the seal.

But over time Kurama ‘s thinking also changed due to Naruto ‘s patience and kindness . It also gradually came to respect Naruto and said that he was different from the people it had met before. So after many incidents, Kurama agreed to let Naruto use his power to save the world.

And so far, the relationship between Naruto and Kurama has become more and more connected and trusting each other. Naruto even allowed the Nine-Tails to switch his body without worrying about his own safety and could switch back quickly. However, no one would have expected that this relationship was slowly killing Naruto .

As we know, the latest Naruto spinoff novel focusing on Sasuke revealed a heartbreaking detail about the seventh Hokage’s life-threatening illness. As detailed in Sasuke Retsuden : The Uchiha Descendants and the Heavenly Stardust, both Naruto and Kurama suffer from an illness that could almost end their lives. So what is this disease?

Recently, a Twitter user with the Spiralling Sphere account revealed some important details in the novel Sasuke Retsuden . And it was surprising to learn that it seemed that the disease Naruto was suffering from was caused by Kurama himself .

To explain the immunity behind Naruto ‘s illness in detail, there is a small part that alludes to it being like an immune disorder that developed early on. Basically, it seems like Naruto was accidentally allergic to Kurama .

Excerpt from the novel Sasuke Retsuden : The Uchiha Descendants and the Heavenly Stardust

This is really quite shocking news, who would have thought that Naruto ‘s companion all this time was the one causing him to slowly die. I wonder if there is any way to cure this disease? To know how things turn out, let’s wait for the latest information about this fascinating novel series.

Sasuke Retsuden : The Uchiha Descendants and the Heavenly Stardust, a novel written by Jun Esaka with cover illustrations by Masashi Kishimoto. The content mainly revolves around the story of the married couple Sasuke and Sakura and the couple’s views on life and death.