A/N: Next world? No saying

Narrator POV

Y/N was in the middle of a street, rain pouring on him, as he looked around, but saw nobody

Y/N:  .....I'm in a city, with a strange blade that look like a key and is fucking cool, but nobody is here to see it..... Lame

He started to walk around, but still, nobody was here to ask him about his weird and cool blade

Y/N: My disappointment is immeasurable and my day is ruined

???: Hey, what are you doing here?

Y/N turn around, and was met with a person that looked like a sort of hero

Y/N: I'm lost, what about you?

???: Need to search for a monster, but i'm lost too

Y/N: ......

???: ......

Y/N: My name is Y/N

Saitama: Saitama

Y/N: I have nothing to do, I'm going to stay with you until i find a way home

Saitama: Ok

They started to walk around, below the rain

Saitam: So, Y/N, what are you doing here?

Y/N: I'm searching for my friends, their name are Sora, Riku and Kairi

Saitama: Hmmm..... Never heard of them, but maybe the association know them

Y/N: The association?

Saitama: Yeah, you never heard of them? Are you from another world or something haha

Y/N: I am

Saitama: Eh?

Y/N: I am from an Island called 'Destiny Island'

Saitama: Doesn't seems to be a fun place

Y/N: It wasn't, like, not at all. I had to get all the food, make the house, make sure it stays in good shape, and even protect people in it

Saitama: Damn, you had it rough huh? For 3 years i had to save people from monsters, but they never knew about me, and i lost my hair

Y/N: I think you look cool without hair

Saitama: Stop lying to cheer me up

Y/N: I'm serious though, you look fucking cool

Saitama: For the first time in my life, someone say I look cool being bald, and their honest....... Thank you Y/N!

And this is how they became friends

Y/N: Anyway, what are you searching for? What type of monster

Saitama: Sea freak, they stink

Y/N: I guess i won't like them much

Saitama: No one does

They continue to walk forward, until they met with someone riding a bycicle

Y/N: Oh, a newcomer, Hi

Mumen Rider: Hmm? Oh, you two are hero too?

Y/N: He is, i'm not, i'm lost

Saitama: Hi lost, i'm-

Y/N: Don't

Saitama: Party pooper

Mumen Rider: Where are you going? The basement is the other way

Y/N & Saitama: ......... I was following him

Mumen Rider: I can take one of you there, but i can ride for the three of us

Y/N: Guess I walk

Saitama: I was lazy because of the rain anyway, thanks

Y/N: So, it's..... there!

Y/N pointed at a random location, as Mumen Rider nodded

Mumen Rider: Yes it's this way. It's a giant basement, armored

Y/N: I AM A GENIUS!

Y/N get going to the location,  laughing loudly

Mumen Raider: What a strange person, isn't?

Saitama: I know him for like, 10 minutes

Mumen Rider: Oh

With Y/N.......

Y/N was jumping around, getting to his location somehow, and saw a huge hole on the giant basement

Y/N: ........That's bigger than my island

Y/N jumped toward the hole, and landed on the edge of it, almost falling

Y/N: I'm good...... So, where's the bad guys?

Y/N look up, and see a giant monster, citizens, and some other people that were on the ground

He pointed at the monster, and yelled

Y/N: Are you the bad guy?!

Sea Monster: You think i look like a bad guy?

Y/N: Hmm...... Perhaps? You're smiling kindly anyway, so i can't tell.....

Citizen: H-HE IS THE BAD GUY! PLEASE SAVE US!

Y/N: Huh? He is the bad guy?! He doesn't look like one! He look so...... fishy, ok he is the bad guy

Y/N jump in the middle, and took a pose, and pointed at the monster

Y/N: It's the end for you, monster of the failures!

Sea Monster: Another clown trying to play tough.....

He send a punch at Y/N, but the said one ducked down, and cut the leg of the monster in one swift, and kick him toward a wall, away from the citizen

Y/N: I said it's the end for you, BITCH!

The citizen were shocked by it, and they started to believe their hero was here

Unfortunaly, fate wasn't going to give that easily, and so, Y/N blocked with his blade, a sort of punch send at him from above, and push him toward where the sea monster is

Y/N: I wondered when one of you would show up anyway, guess I can do my job perfectly

Y/N charged at the monster, and started to slash him all around his body, getting it on his knee pretty quickly, before Y/N appeard above it, ready to deal the final strike already

But his blade was hit by an acid spit from the sea monster, as he let go of it, and shake his hand

Y/N: You know it's rude to spit at people like that? I could die from it

Sea Monster: Of course, this is the goal

Y/N and the Sea monster charged at each other, but Y/N had a dark aura around him, making him stronger for a few instant

He kneeled the chin of the Sea Monster, before back handing it. He disappeard behind it, kicking it toward the roof

But, Y/N wasn't finished here as he charged at the Sea monster, and hit him

From normal human eyes, it was like he teleported, but no, he was just too fast for them

The Sea monster was in the air, as Y/N used the roof as a support, and charged at him, and elbowed his throat, sending him to the ground

Y/N landed on the ground, before quickly turning around, and spin kick the Heartless's jaw, almost beheading it, but he broke his neck, as it falled on the ground, motionless

Silence falled on the basement, as the citizen just saw a monster that destroyed Rank-A Heros, and even  S-Rank, beaten by a teenager that appeard out of nowhere

Suddently, someone started to clap, then another, then another

Instantly, all the citizen in the hiding started to cheer and yell because they were saved

Y/N started to walk toward them, letting a sigh

Citizen: B-Behind you!

Y/N back flipped, and kneel in the face the Sea monster, who was still alive from all the damage he took, but was barely able to breath

Y/N: I didn't hit too hard so you can still live but with this shame of a kid kicking your ass upon you, but it seems like I have to finish the Job

Y/N extended his hand, before some lightning got out of it

Suddendly, Thunder pierced the dome, hitting directly the Sea monster, killing him instantly

Y/N: And that's i- OH COME CAN ONE OF YOU TWO STAY DEAD FOR ONCE?!

The Heartless head got back to it's place, before it roared, and aim at Y/N with his arm

But, before it could shoot, it exploded in billion of pieces, as Saitama was shown behind it, his fist fuming

Saitama: It wasn't a Sea monster, and it didn't stink. My day have been blessed

Y/N: I guess, I did the job of some hero, while not being one? I'm still confused about it

Saitama: Oh, then I guess i can explain you somewhere else, here it's going to be a little bit difficult

He pointed at the citizens that were still celebrating for the victory of Y/N

Y/N: Following you, buddy

They sprinted away from the party, heading toward Saitama's house

Chapter 3: Finish

A/N: First Arc is One punch man, will do until the end of Season 1 then go to another universe. I have planned something for Season 2 do not worry

See you on the next chapter!