There once use to be a small, little boy. He was a little boy that was cursed. Everyone in the village hated him for he had the monster that killed their beloved fourth Hokage and almost destroyed the town. The villagers had thought that the small boy was the monster so they did not take pity on him. They treated the boy like a disgusting monster. A thing not worth living. Abusing him in any way possible.
The little cried. He would always cry. Wanting the torture to stop. He just wanted to be liked in this village. He wanted people to like him. He wanted to belong somewhere. The only friends he had were the animals in the forest that he could talk to.
His first kill was when some men had tried to rape him. They didn't succeed. All died at the hands of the small boy who at that time knew that if he wanted to survive he would have to kill. Although he killed the boy had a kind, kind soul.
The boy found out that not everyone hated him. He was able to meet some very kind people. He had met both Konoha's sannin and had grown a bond with them. He had also grown a bound with his teacher iruka. But no one else wanted to get close to him. The adults pushed their children away from him and the children made fun of lust for blood made it even harder for people to get closer.