Prologue
October 10 is the day when the nine-tailed demon fox attacked Konoha. He escaped from Kushina Uzumaki, the wife of the fourth Hokage, Minato Namikadze, when she gave birth. During labor, her seal weakened and the demon broke loose.
While she was giving birth, Konoha's shinobi as they could, restrained the demon. But the demon was very strong and very angry. A lot of people died from his attacks. But that all changed when a huge toad appeared with a man on its head. That man was Minato. After a few seconds he, the toad and the nine-tailed ones disappeared.
They appeared a few kilometers from Konoha. Thanks to fuinjutsu, whom Kushin had taught him, the Fourth was able to immobilize the demon for a time that was not necessary for him to prepare the sealing technique.
When he was ready, the third Hokage appeared with a child in her arms.
"Are you sure, Minato?" - asked the old man.
"Yes, Hiruzen, we have no other choice," Minato replied.
The young father put his child on a special pillow and started the technique. He used a sealing technique in which he and the Third Hokage would give out 75 percent of their chakras, but they would remain alive.
The nine-tailed demoness realized that she was being sealed again, and tried to break free, but nothing happened. And when she was almost sealed, two small chakra balls separated from her and flew away towards the village. Minato and Hiruzen could barely stand, but were glad that it was all over.
Meanwhile, two chakra balls were flying over the village, but because of the smoke from the fires, they were not noticeable. Soon they began to decline. They flew into the open window of the hospital, into the ward where Kushina and her second child were lying, whom she pressed to herself. They both slept and did not suspect that in the future they would be in for big changes.
One ball of chakra flew up to Kushin, and the second to the child. They slowly entered their bodies and dissolved in their chakra. And soon a black tattoo appeared on the breast of the child and his mother as a symbol of the village of the Hidden Whirlpool, but almost immediately disappeared. They continued to sleep peacefully, soon they were joined by the father of the family with the child, in which the Nine-Tailed was sealed. He lay down on the next bed and also pressed the child to him.
Inside the seal.
"You have no idea what awaits you, Minato Namikaze !" Said the demoness loudly and laughed wickedly. And soon she fell asleep.
I know that this is very little, but this is my first story. and just as English is not my native language.