Yuuji Sakai, the usually vacant and somewhat weak protagonist, lives an ordinary life until the sudden appearance of a monster disrupts his ordinary life. Under the setting sun, Yuuji is suddenly attacked by an alien monster that transforms human "existence" into spiritual fire and then devours it.

At this time, a girl who called herself "Flame-haired and Burning-eyed Slayer" appeared and rescued Yuuji from the monster's mouth. Yuuji Sakai named her Shana based on the name of her large sword.

She told Yuji that his life was about to end - it turned out that outside this world, there was another world called the "Red World". In order to realize their ambitions, the people there took away the world's original power, the "power of existence", from humans one after another, and Yuji was one of the victims.

After the Crimson Apostle took away the "Power of Existence",...

In the post-Naruto era, the seventh Hokage Naruto who died in battle suddenly woke up and found himself in a different world.

While still concerned about the final battle between Boruto and the Otsutsuki clan

The reappearance of the Six Paths Sage tells him a different secret.

It turns out that the prediction of the great toad immortal was correct

Boruto is indeed the child of prophecy

However, what changed was not the ending of the ninja world, but Naruto's fate.

The Sage of Six Paths holds the Samsara Eye in his left hand and the Space-Time Treasure "Plow" in his right hand.

Looking at Naruto in front of him, he asked again:

"Uzumaki Naruto, if you were to be reborn again, tell me, what would you choose?"

The Seventh Hokage Naruto said with a firm gaze: "I will give up all my principles and protect everything in the ninja world at all costs to make up for the regrets of my previous life!"

You, who come from another world, have truly unlimited potential.

In the dark sewer, a slime was born silently!

He is a slime with a flexible moral bottom line.

For some beings, he is absolute evil, but for some beings, he is the only salvation!

A brand new future is born in destruction. He is the absolute demon king, the master of the seven deadly sins, the king of monsters, the slime!