The new strongest

Saitama flashback

(third person)

Timeskip 13 years into the future (I know it's supposed to be 18 years, but I don't like big age gaps between the characters)

We see a huge explosion in the middle of a city and a purple skinned guy with antennas being in the middle of and until he decided to start floating in the air and start throwing destructed balls.

Scene change

We see a tv with the news on

News reporter: "The rumbling and tremors continue!! The explosions rocking city A have spread blanketing the whole...

The Tv disconnects and we see that a bald guy was watching it

Bald guy: "Here I go... SO I'M BALD-WHAT'S YOUR PROBLOM AUTHOR!!!"

Author-san: "Sorry Saitama. It will never happen again."

Bal- I mean Saitama: "Good"

Author-san: "Now I have to fix this stupid 4th wall. :(

Scene change

We see a teenage girl crying in the middle of a city that has been reduced to rubble.

Teenage girl: "Waaah! Daddy! Mommy!"

The purple alien appeared next to her and offered his hand only to increase its size and try to attack her but suddenly and white hair man with blindfolds stood in front of her and hugged her to try to calm her down while the monster's hand was a foot away from them, stopped by an invisible force and the monster is wondering what is happening until the man and girl both teleports away.

White hair guy: "It's okay now. We're safe now."

The teenage girl opens her eyes and is startled a little when she sees a man with blindfolds but after realizing he saved her, she starts crying again saying thank you.

White hair guy: "It's what heroes do. Here. This is money to get back later and stuff and use the rest however you like. Well, see ya."

Girl: "Wait. What's your name?"

White hair guy: "Y/n, y/n l/n"

And he teleported back to the monster's location. While y/n saved the girl, Saitama came, and one punched the monster and got upset and left. When y/n returned, he only to saw the monster with a hole in its stomach and his eyes falling out of his body and blood everywhere.

y/n: Did Saitama finish him off? Well looks like the story hasn't changed. Now that I think back on it, maybe I should have said something differently to Tatsumaki. I know I shouldn't have said that, but at least this way she would still be strong. I'll just help make her realize that allies are important after the entire Monsters Association arc. Oh well. it's too late thinking about it now. And also this way I know what will happen in the future for a little while. 

As y/n teleports home you can hear the sound of drums and a blond man with 3 scars across one of his eyes appear with a scary face covered with monster blood.

Saitama's flashback

three years earlier

random male person: "WAAH!"

random female person: "KYAAAAH!"

random male person: "That thing's gross! Let's get outta here!"

While everyone is running away, we see a black-haired man walking straight past a humanoid crab that has 2 big claws, an underwear on and 2 nipples drawn on his chest with sharpy.