King of humanity (rewrite)

Prologue

In a city in the northern outskirts of Japan name Kouh. Kouh was a moderate large population of 300,000 people where most attractions goes to hiking and picnics. Families have a positive view of the city to relax a bit.
However there was gangs but they were not relatively large like in other places like in Tokyo. It was a control city where local police can lower the crime rate to 5%. Yet the city was not a big name like Kyoto or Osaka whom are in rich in history, but the locals knew the special place of the land it was in.
It was a glorious day in Kouh city. The sun shows it's radiant energy on a Sunday, the birds were chirping, a calm breeze go through everyone and the sound of children playing was beaming to everyone.
Except for one.
The boy was sulking down the road but to everyone thought he was having a bad day, but they were half correct. This boy prominent feature was his spiky brown hair. The boy was walking down and he bump someone.
"Hey, boy, why so gloomy?" The old man ask.
The boy didn't respond just staring the old man.
The old man turn and ask
..
..
..
..
..
..
"Let me guess parents said stranger danger talk" the old man said.
The boy nodded.
"Hmm.... it would be more difficult to talk to you" the old man said. "How about I be your friend for the day" stated the man proudly.
"I can't talk to weird strangers" Said the boy in a flat tone. But the man just laugh at that statement he made.
"Then what about acquaintances" the old man said proudly.
"Acquaintances" said the boy in a confuse tone.
"Yes, we won't be friends but partners in some way" said the man.
"Ok" said the boy.
"Then why so gloomy in a beautiful day like this" said the man in a gentle tone.
"My... friend... he... has... gone to England" said the boy with some tears on.
"Why did your friend go to England?" Said the older man.
"His father said he has work there" said the boy.
The old man hum while stroking his beard. A thoughtful expression appear in the old man's face while staring at the boy.
"What were some things that you guys usually play?" Said the man.
"We played 'hero'!" Said the boy.
The old man's face smile at him.
"What's so funny playing hero" said the kid
"Nothing" said the man
"Tell me boy what is a hero?" Said the older man
"A hero is some that saves people and the world" said the boy.
"Hmmm" said the man
"Then what about the villain" said the man.
When the boy heard the question he made a sour face"The villain always loses and goes to jail and makes people sad" said the man.
"Then your father's friend is a villain?" Said the man.
"No, shidou-San is not a villain" said the boy.
"Should the hero should understand the villain and their motivations boy? Said the elder man.
"Maybe? But yes to prevent other things in the future....right?" Said the boy in a confused tone towards the man.
"Good now boy! Since your a good a child, I got you a present for you!" The old man started to rummage through his bags until he found a small box that contains some cards.
"Huh" said the boy with a confused face.
When the old open the box there was 10 cards but to the outside they were like tarot cards.
"I'll give a secret boy" the old man said.
When the old man said.
"What is the secret" said the boy with an eager tone.
"The secret is that these cards can let you become heroes" said the man.
"You sure" said the boy with a skeptical tone towards the man.
But when the boy said that, he saw a night with the sword up
"Saber" said the man. "The swordsmanship is almost to compare to the gods but you can relate to..." as the man said
"Like King Arthur" said the boy.
"Yes, like King Arthur" said the man.
The other card was a man with spear. "Lancer" said the old man. "You know Maki Zenin from jujutsu kaisen".
"Yea, the spear woman that doesn't have the power but makes up with a spear" said the boy.
"Yes" said the old man. Another card shows up and it was a person with a bow, "Archer" said the man.
"Like Robin Hood" said the boy when he saw the archer card.
"Yes like Robin Hood" said the man. Another card shows up and it was a person standing on a chariot.
"Rider" said the old man. The boy saw the card and think of a superhero like Batman.
"Like Batman and the Batmobile" said the boy.
"Yes" the old man smiles and chuckles at his answer.
Another card shows up and it was a person with a staff, "caster" said the old man.
"Like Merlin" said the boy.
The old man smiles at his answer.  Another card shows up and it was a man with two daggers at his hand, "assassin" said the man.
"Like the game 'Assassin Creed'" said the boy.
The old man nod his head.
There was two more cards left but one was blank, but the other one was an angry man, "berserker" said the old man.
"Like Solomon Grundy from the Batman comics" said the boy.
The old man hum in silence as the boy's answers were peculiar yet different from the man as he understood the boy like heroes. Yet the grail don't understand that much of modern heroes that people like iron man or Superman, the boy answers were good and similar to the class cards to be shown to him.
"Which card do you choose umm what your name kid" said the man. 
"Oh sorry I forgot to say my name. My name is Issei Hyuodou" said Issei
"As for me, I'm Kischur Zelretch Schweinorg" said Zelretch. "Now pick your card Issei!" Said Zelretch.
"I'll... choose..." said the boy, but the blanco card was glowing a whitish color with gold as two figures can be seen.