Whats the truth??

In Nabraska, there was a lonely boy who named Johnny. He lives by his own. His parent left him for no reason.
There, in every week people dies strangely. Like one of the men who died with all his teeth gone getting pulled off. No clue who did it and polices found there were 38 coins under his pillow.
Or about the two sisters that died because of cutting their own body parts. Some students said they've been trying to fit themselves in a fancy jacket. Heard that it is free for the person who fits in it.The police found them in front of the school lockers.
When Johnny read the newspaper about these horrible deaths, he new these things would happen.
One day, Johnny went out for groceries. He had some money by working as a newspaper boy. When was walking into a market, he saw a lady buying caramel apple by the street. He ran towards the lady and said,
"no! Don't buy those apples. You'll get poisoned."
The Lady laughed and so as the apple seller. The lady then walk away while eating the caramel apple, but not far enough Johnny sees the lady seemed to be choking. And then she falls to the ground and died. Everyone around panicked.
Johnny said to himself," i've warned you" ..

The apple seller turned to Johnny suspiciously. Johnny did nothing but walk away like an innocent child.

After buying what he needed, he head back home. Suddenly, there is a black cat outside of his kitchen window. He opens the window to let it in.
"Hello johnny." the cat said. Johnny smiled.
"are you one of the cats that can talk?" johnny asked.
"johnny, little child, its all a lie"
"what?"
"everything you believed in what your parents have told you. In fact, Cats don't actually speak" the cat sits on the dining table. Johnny began to confused of what the cat had said.
"let me explain everything while you sit down quietly, and listen"
Johnny obeyed and sit down on a chair.
"surely you've read the newspaper every week. And,oh how those people died in strange ways." the cat wiggles its tail.
"Strange? I thought everyone knows how and why did they died. Like the man who was murdered by the toothfairy. Hadn't anyone ever told him never put their tooth under a pillow? Or the toothfairy will take all of your teeth"
Johnny explained.

"dear Johnny, all those things your parents told you about, are not real. Those are just fairy tales. It was you who made it happened. Johnny, you have gifted a unic and at the same time most dangerous power. Do you know cinderella? Two sisters tried to fit in cinderalla's glass shoes but they never cut their legs off! And cut or not, its just a stupid old fairy tale!" the cat tried to hard to explain and gratefully johnny understood what hes trying to say.

" you mean, like snow white? Is she a fairy tale too?"

"yes! You believed it because your parents tried to make you stay away from street carts. Because they think that it might be safer for you not to get food poisoning. Now you see, outside food are some poisoned
Well maybe its because of its clean status.
But not all food. I mean, i've been stealing fishes everywhere for like many years and im steal alive. So all you have to know is be careful picking outside food"
Johnny felt grief in his heart. He realized it was him who was killing all the people around. He began to feel scared.

"But why me? Why are you telling me this?!"

"Because obviously you need to know about the truths! Child!" johnny froze for a moment.

"But,..why is it YOU needed to tell me this?.."

"its Because of one of your untrue beliefs, is what had killed my owner.."

"No..oh my god.." johnny sobs.

"So when I found it was you all along, I began to search more information about you. I watch you everyday. And finally I know you never meant it. You're innocent. So I forgave you. And to stop the unfortunate deaths around the neighborhood, its up to me to stop it and tell you the truths"

Johnny wipes his tears off.
"well.. Do you happened to know why my parents left?"

"i'm sorry"
The cat sees how lonely the kid is. Sad, lonely.. That means he must needed company, a friend. So the cat desided to be johnny's new pet. That would be more better for them both and much safer for everyone in town because the cat can tell which is true and which is not.

So they lived their life together and grew up together. But, in all of what his parents had told him, only one never believed in. He belived that cats don't talk until the black cat started talkin. But..then how did it spoke before Johnny even believed in it?

Turned out, the cat is not an ordinary cat but a mythical creature...