One punch man is definitely one of my favourite series EVER, anime and manga. So I thought that it would be fun to write a fan-fiction about it.
This story will be about powerful people who try to win against our obviously overpowered hero.

"You are way too strong" Boros said with a small smile as his consciousness started fading away. But before the darkness could completely cover his mind, he thought "... if only I could fight you again... Saitama..." and with that, everything turned black.

"Can't see" he thought "I can't see anything" he tried to look around but found something else missing "I can't feel anything. Am I dead?" he tried to move again but failed "Is this how I am going to stay forever?" this thought scared him "But I guess that's how most of my life vent. Me, the unbeatable Boros, the ruler of all" he thought and then he just stayed like that for a while, not even thinking. But then a thought hit him "But if I'm unbeatable, why am I dead?" he quickly started searching his head for an answer, and he quickly found it "Saitama!" the memories of that wonderful fight. The memory so fresh he wondered how come he didn't remembered it sooner. The joy of finding a strong enemy, the thrill of going all out against that enemy, even the fear of when that enemy overpowers you, the pain when you lose to him. All these wonderful feelings re-entered his mind. Saitama, the man who beat him. For Boros, that man was like a distant light that saved him from the shadow of being the strongest. Boros subconsciously tried to reach that light with his arm. And, strangely enough, there was 'something' in his arm "Strange, even though I'm dead, I'm still feeiling things?" he tried concentrating on that feeling but soon regreted doing so, because once he did, the strange feeling turned into intense pain. Soon enough, the pain started spreading up his arm and across his entire body. He could have dealt with only this amount if the pain had not multiplied about ten times "Stop it" he pleaded "Stop it!" but the pain only grew. But when it became almost unbearable, not even noticing it himself, he opened his eye "I said, STOP!" he looked at his messed up body and did what was most natural for him. He healed.

Flesh grew and his shell reformed around it, a process that never left a good taste in his mouth. But ignoring all that, there was still a big plus, the pain vent away.

Panting, he fell back from his sitting position, that he didn't even realize he took in the first place, and just stared at nothing in the sky.

" I'm... alive?" there were many more questions flying around in his head right now, but this one was probably the most important "I'm alive" he voiced his thoughts this time.

After a few minutes of resting and getting used to that fact, he sat up and looked at his surroundings.

First thing he noticed was that he was still on his wrecked up ship. Second, there were dozens of flying spherical robots eating his ship. Third, there was a robot titan who was receiving and sending the smaller robots. And fourth, he wasn't able to gather any energy within himself.

"I don't think I could beat that robot in the state that I'm in" he looked at the spherical robots and saw that even though some were going about really close to him, they simply ignored him and continued their eating.

Seeing that the mother ship wasn't going anywhere soon, he stood up, and tried walking in the opposite direction of the titan.

The process was a lot harder than it should have and that made him annoyed at his own inability to simply walk properly.

He repeated the process of consciously putting one foot in front of the other for an hour, but for him it felt so much longer. When he finally reached a forest a few miles away from the crash site, he fell back against the first tree and rested.

After a while, he sat properly in a meditating position, closed his eye and tried to concentrate on the little... 'something' inside of his chest which he guessed was his energy. He tried to imagine it expanding, increasing. And pleasantly enough, it did, even if it was a small amount, it still increased. Even if the sensation was nowhere near as strong as it used to be, he knew, that in time, he will be even stronger than before "And then, I will fight you again".

And so Boros sat there, concentrating. Seconds ticked away, then minutes and hours. Days. But he didn't notice it, because all he knew was that his 'Power' kept on growing. And when that growing finally ceased, he came back to the real world.

He finally opened his eye, but all that he saw only made him confused.

In the far distance, where his crashed ship should have been, stood a black city "How long was I..." but before he could even finish that question, a new one popped up. What was he doing? "... training..." was the best thing he could think of calling the state he was in.

He ignored the initial question since he had no clue as to what had happened and instead started thinking of what his next course of action would be. He chuckled to himself for even thinking about it "I want to find him, to FIGHT him again" he thought as he looked over to the black city.

He bent over in a running position, hoping to quickly sprint the 3 mile distance to the city. But before he started, a wall of his own hair fell and blocked his vision.

After using the meteoric burst, his hair always grew incredibly long and it was incredibly annoying. So he grabbed it all in his hands and ripped it all from his head.

It did hurt a bit, but he quickly focused on it and the pain vent away. The only downside of healing his head was that his hair also grew, not to the knee length like it was a couple of seconds ago, but to his older and more familiar short (by his standards it is) hair. He sighed but ignored it, because right now, all he wanted was to meet Saitama.

He once again bent down in a running position, this time hair not blocking his sight, and dashed towards the city with a great burst of energy. It only took him about ten seconds to beat the three mile distance to the city. But now that he got a closer look at it, it seemed more like a fortress than a city. He ignored the huge wall separating him and the city, and simply jumped over.

As he was sailing through the air he looked at the biggest building in the middle of the city and decided to start his search there.

Once his feet touched the ground, he stopped and observed this surroundings. First thing he saw was that everything except the ground was most likely made out of some black metal, which was so smooth that you could easily see your own reflection. Secondly, for such a grand city there were surprisingly few people, even now there were only five suited humans that were gaping at him, too shocked by his sudden appearance to do anything. Seeing that there was nothing more for him to look at, he started walking towards the tower.

By the time he got there, he saw a dozen more of the suited humans, only this time they weren't frozen from shock, instead they only gave him curious looks.

When he came to the entrance, what he expected to see was grand gates being guarded by fire dragons like he once saw on some planet he conquered years ago, and not a simple automated sliding door with absolutely no protection. But he let it slide and simply walked inside.

"Hello, how can we help you?" came a feminine voice from a counter in front of the entrance.

He wondered if he should just ignore the woman and search by himself, but if she would lead him straight to the person he is looking for then he's all ears.

"I have business with this planet's representative" he spoke, thinking she would know who he is looking for.

The woman simply looked at him with a blank stare, not knowing if he was being serious or not, but she still smiled at him "You mean the ones in charge?" she asked and typed something into the computer"I'm sorry, but there doesn't seem to be any appointment today, and only S-class heroes and the workers can meet the higher ups. But I'm sure we can set one up if you'd..."

But before she could finish, Boros interrupted "Are those higher ups at the top?".

"Yes, but you can't go there without an appointment" she said a bit more strictly that before. But he ignored her and vent over to the doors that were likely the elevator. He pressed a button and the doors opened, revealing a small space to stand in "An elevator? Haven't seen one of these in a while" he thought. But before he could enter, the doors shut in front of him.

"Hey! I said you can't go! If you won't stop, I'll call secu..." the woman shouted at him, but couldn't finish her sentence because when Boros easily tore the metal door down she quickly shut up. And instead of shouting, she pressed the alarm button under her desk.

Boros only sighed at the loudness of the alarm and pressed the highest button available. The elevator quietly started to head up and he couldn't help but grin at what was about to happen "I'm back, Saitama".