In a world with jujusu chakra and much others there’s the 10 fox tails a fox with 1 tail 2tail and up to 9 tails but when you combine all 9 foxes you get the 10 tails but what is a mere rumor among clans villages and country’s is a fox know as the 11 tailed demon its more powerful then any fox and any human only know to rebirth every 1000+ years and you are born with that curse of having it inside you you were immediately cast out of you village the second you got the mark to show at just 5 since then you’ve lived in the forest not knowing the voice in your head was the demon everyone thought of