Prologue

This story starts in a certain city called Z-City, more specifically in an area called the Ghost Town. As indicated by it's name, the streets were devoid of any life, if not for a bald man walking towards an apartment building. This bald man was wearing a plain yellow one-piece jumpsuit with a short zipper at the collar, along with a black belt with a round golden buckle at the center, and a long white cape. He also had long red gloves, but what was most shocking about his appearence was the blue liquid running on his suit and on his face.

"*Sigh* I didn't even have the time to go to the supermarket. Ahh! To think i missed the sales!" Exclaimed the man. He continued to walk until he reached the apartment building, he then went to his own apartment and entered before jumping on his couch. He seemed to hesitate whether to eat or watch television but shook his head and picked the remote. He grabbed a water bottle and started to drink before he spat everything when he saw what was on tv.

"A-Again?!!" He clenched his teeth, threw the bottle away and quickly exited his apartment. As soon as he did that, a powerful wing hit him, making his cape float while his expression went from bored to serious.

"This time i hope it won't end in one punch again." And with that, he disappeared.

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( Hero Association HQ)

In the Hero Association meeting room, several staff members were discussing about the newest threat that appeared a few hours ago.

"This mysterious defeated both Lightning Max and Stinger before moving towards Z-City. As such Child Emperor and Metal Bat, who were the closest to Z-City, were sent to defeat it." Said the Minister Officer of Justice for the Hero Association, Sitch. All around the table, the other staff members snorted while one of them, a fat man who seemed to always be sweating, decided to voice everyone's thoughts.

"Surely this is too much. Lightning Max and Stinger may be A-Class Heroes but they are starting to show disappointing results, it is not surprising that this mysterious being defeated them both. However sending Metal Bat AND Child Emperor a little bit too much, don't you think so Sitch ?" Asked the man as he wiped the sweat he had on his forehead with an already drenched handkerchief.

Sitch bristled with anger but took deep breaths and glared at the man.

"They are already on their ways. Telling them to come back would be incredibly useless. If this threat is weaker than we think it is, then they will be back quickly." Said Sitch, before standing up and walking out of the room. As he walked out, he missed the worried glances that the staff members sent to each other.

"Don't you think this is weird that everytime one of those powerful monsters appears, it always goes to Z-City ?" Asked the same fat man, he was the only one who didn't seem too stressed out by this.

"Indeed. It seems that 'HE' still reside there." Said another member.

"Did we send him another invitation ?" Asked one of the only female staff member.

"We did.....And once again, he nearly killed the person that we sent. I don't think it's wise to send anymore invitation to him. Even if he's not a pro Hero, he still help us more than all those lazy and useless fake Heroes." Said the fat man.

"Are you joking Tanuki ? What about Tatsumaki, King and Blast ? They all are more powerful than him and save way more lives. " Said the woman who talked just a few seconds ago.

"HAHAHA! Tatsumaki is a spoiled brat who doesn't care about anything else then....Well she doesn't care about anything actually. King is the laziest Hero we have, and Blast......We all know he doesn't really count." Said Tanuki, he looked like he was finished but before anyone could talk he started again.

"And don't even bring the fact that 'HE' and Blast are friends. It never mattered. Blast doesn't count, atleast for now." Said Tanuki, and this time he left his seat and exited the room. He stopped just in front of the door, looking at a screen that displayed the mysterious being that Metal Bat and Child Emperor were to defeat. A muscular man dressed in a black suit, who was wearing white fingerless gloves and who had the head of a goat.

[ Dragon Class Threat (Potentially higher): Black Goat ]

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(On a building in the Ghost Town)

The bald man from before was standing on the roof of a building searching for the monster he was supposed to beat. He finally found him, and he looked really weird.

"Searching for me perhaps ?" Asked a voice coming from behind him. The bald man turned around and was shocked to find the man with the Goat head standing right in front of him.

"Don't look so shocked. I'm afterall, known for my incredible speed." Said the man, his voice sounding more human than the bald man thought it would. Before said man could open his mouth, a punch found it's way to his abdomen.

What truly shocked the bald man was the fact that contrarily to usual, he actually felt it. It didn't hurt, but it did feel like a punch. The bald man smirked in excitement and clenched his fists.

"It's gonna be good." Said the man.

"Well you do look ready to fight. And if i must say, i'm impressed by the fact that punching you nearly broke my fist." Said the man with the Goat head as he showed his hand that was slightly twisted in an unnatural way.

"May i know your name ?" He asked.

"I'm Saitama! I'm a guy who plays Hero for fun." Said the bald man, smiling widely as he felt his blood boil. He could feel tremendous power coming from the man with the Goat head.

"And i'm Black Goat. I do hope you'll offer me more resistance than those heroes i defeated in an instant."

Both fighters took their stances, though Saitama just tried to look cool. They were about to attack when a blade pierced Black Goat's throat. Before Saitama could move an ominous voice spoke.

"Well hello gentlemen. I'm The Necromancer, and require your corpse Black Goat....So quickly turn into one please."