Location: Y/n's Apartment - Abandoned Apartment Complex - City Z

After that fight with the mosquito monster that caused the outbreak, the demon cyborg and caped Baldy, Y/n and Godfield made it back to their apartment in City Z before they both heard a knock at the front door.

Y/n: Huh? I wonder who that could be?

Godfield: Maybe it's someone delivering pizza?

Y/n: I highly doubt that, but I don't remember ordering a pizza today.

Saitama: (Outside) Hey! You in there? You got visitors!

Then Y/n and Godfield knew who that was before Y/b opened the door slightly before popping his head to look at duo standing on his doorstep.

Y/n: You two actually showed up...

Then he invited the two inside as Y/n prepared some tea for them and asked the two to why came here for a visit.

Y/n: Man, we got a lot to talk about since that last battle with the mosquito monster that started the outbreak. (To Genos) I can tell you're a cyborg, am I correct?

Genos: Yes, my body is mostly mechanical. As long as there are parts, repairs are quick.

Saitama: You're an odd one.

Y/n: I agree.

Genos: What kind of parts do you use on your body?

Y/n: Don't use any.

Genos: Then what about the skin-colored armor on your head?

Saitama: Yeah, I'm pretty sure that's his skin.

Genos: But that would mean you're bald.

Saitama: So, I'm bald, what's the hell is your problem, huh?

Genos: Me? You'll listen to my problems?

Y/n: I didn't mean by asking what your problems, are?

Genos: Actually, four years ago, when I was 15, I was still a real human being.

Saitama: Did you hear what he just said?

Then Genos continued on with his life story, causing Y/n to start to feel annoyed from the incredibly long story as Saitama can tell that Y/n is about to blow a head gasket from Geno's constant rambling of how he became a cyborg.

Genos: Although we had to pinch pennies, my family and I lived a peaceful and fairly happy life. But one day, a crazy cyborg went out of control and attacked our town. The insane cyborg. Most likely, a failed body modification generated an irregularity in his brain. He destroyed everything in sight. Parks, schools, buildings, my house. He even took my family's lives. Miraculously I survived, but being only a weak 15-year-old, I was alone and at the end of my strength in a ruined town. That's when Doctor Kuseno happened to pass through. Doctor Kuseno, a scientist for justice, was on a mission to stop the destruction caused by the rampaging cyborg. I asked Doctor Kuseno to perform body modification surgery on me. That's how I was reborn as a cyborg who fights for justice. I promised Doctor Kuseno that one day I would terminate the evil cyborg.

Y/n: I see--

Genos: It's been four years since that day. I'm now 19 and I've been wandering from town to town eliminating evil. The number of monsters and criminal organizations I have destroyed are too many to count. But I have been unable to find any clues about the insane cyborg and have become increasingly frustrated and restless. I find myself chasing a virtual image of that cyborg whenever I square off against my enemies. Then last week, when that mosquito monster appeared, I let my concentration slip. I was convinced I could not lose to anything but the rampaging cyborg, so I neglected to even analyze the data on my opponent and rushed to confront her. The result, as you know, was that an opponent with immense strength bested me. If you, Master Saitama, had not been in the area, I would have undoubtedly been destroyed. Master, you saved my life. My life that was once saved by Doctor Kuseno has now been saved again by you, Master Saitama. I feel the weight of that responsibility. I must not die before destroying that cyborg. And to do that, I must continue fighting evil as a righteous cyborg until he appears before me one day. I need to get stronger. Last week, when I saw your punch, I knew I had to study under you as your disciple. If only I could be as strong as you, Master Saitama! I have an old enemy to defeat, and the battle is not for me only. It's for my hometown, and for Doctor Kuseno too. I realize I am still inexperienced. But right now, I need enormous power so I can eradicate the greatest of evils! Doctor Kuseno is--

Y/n: Enough, you idiot! Shorten this stupid story it to 20 words or less!

Saitama: Genos, please! You're gonna make Him go on a killing rampage If you keep talking nonstop like that! Just do what he says or we're all gonna die!

Y/n: (Deep Breath) Look, I'm sorry for my angry outburst, but it's hard for me to understand everything you're trying to say to me, but please ask me what you want from me.

Genos: Here's the short version as master requested: Please teach me and my master the way to become strong like you.

Y/n: I see, how are you, Genos and Saitama?

Genos: 19, sir!

Saitama: I'm 25 years old now.

Y/n: So young...I'm sure you'll both surpass me in no time.

Genos: Do you really mean that?

Y/n: Of course. You both may be surprised by this, but I've been training for more than 1000 years since I was 12.

Saitama/Genos: (Shocked Expression)

Saitama: WAIT WHAT?! YOU WERE 12 YEARS OLD BACK THEN AND BECAME THAT STRONG AFTER 1000 YEARS?!?! HOW IS THAT EVEN POSSIBLE?!?

Y/n: Well....my origin story is quite a long and fascinating story, but I can hardly tell you won't be able to listen every word that is more than 20 words or less, but if I want to help you two out. I want something in return, I want to know how you got so strong, Saitama? Tell me how you became strong, and I'll tell you mine. Do we have a deal?

Saitama: Fine. I'll do it, but you have to defeat me in a battle. If you succeed, I tell you my secret, but it won't be easy. You sure you can handle it?

Y/n: You got yourself a deal, then.

Then suddenly, Genos detected something nearby with his scanners.

Genos: High Speed Object approaching- It's here!

Y/n: Huh?

Saitama: What?

Then without warning, a mantis monster crash into the apartment through the ceiling as he is ready to fight the three heroes.

Mantis Monster: (Laughs) Greeting I am...huh?

Then he got punched in the face by Y/n as payback for busting through his ceiling, resulting in the monster's head to get crushed into a mushy pulp.

Y/n: (Angry Demonic Tone) You're gonna pay for my ceiling!

After the monster was defeated by a one-hit KO by Y/n, we cut over to outside the apartment complex to see two more monsters, a slug and frog monster that are waiting for the mantis monster to come back with the targets, but the slug monster soon found out that the mantis monster is already dead after he managed to break into the apartment through the ceiling after he can't sense him with his telepathic abilities.

Slug Monster: So...

Frog Monster: Hm?

Slug Monster: It seems our advance agent, Kamakyuri, is down. I can't sense him with my telepathy anymore.

Frog Monster: What? Wait a second...Wasn't he one of our stronger guys?

Genos: There are two more outside. Master, leave them to me!

Then Genos got back outside to see Saitama already outside to witness that Y/n had already killed the Frog and Slug Monster with their remains splattered all over the pavement.

Y/n: Don't bust people's ceilings!

Genos: Oh, never mind.

Saitama: Can't these guys just come through the door?

Y/n: Yeah, they could've have done that instead of busting through the ceiling like that.

Then suddenly, both Y/n and Saitama were dragged into the ground with their heads sticking out of the ground.

Genos: M-Master!

Saitama: No, it's fine. We're good. I kinda feel like a...bamboo shoot.

Y/n: Yeah, but I wonder where these monsters are coming from anyway?

Armored Gorilla: Elevated energy levels detected.

Then suddenly, another monster appeared, but this time it's a cybernetic gorilla known as Armored Gorilla as Genos turned back to face the monster as he was shocked to see another cyborg like him.

Genos: (Thinking) A cyborg? Could it be...?

Armored Gorilla: You are not the targets.

Saitama: What's going on? I can't see.

Y/n: (Turns his head around) Uh oh! Genos is fighting a robot gorilla!

Saitama: Wait, really?

Y/n: Yeah, and he's surprisingly tough though.

Armored Gorilla: Out of the way!

Then Genos began defending Y/n and Saitama with his amazing fighting skills as a cyborg, which really surprises Y/n to see such an amazing and skilled cyborg like Genos defending his partner, Saitama from the armored beast.

Genos: I have a few questions for you.

Armored Gorilla: (Growls)

Then suddenly, Saitama and Y/n looked up to see another powerful looking monster that is also a lion named the Beast King as he laughs down at the two of them being trapped under

Beast King: You two would appear you're both in what they call a "tight spot." Magnificent work, Ground Dragon!

Then we see yet, another animal like monster named Ground Dragon that came out of the ground as he appears to be a mole that also explains how he managed to drag both Y/n and Saitama into the ground.

Ground Dragon: It complicates things if they both put up a fight.

Genos: Master!

Armored Gorilla: You dare look away? (Charges at Genos) Quite courageous!

Then Genos continued fighting Armored Gorilla while using his Incineration Cannons, which do any good to stop the cybernetic gorilla, who appears to be really strong with all of that metal around his body.

Armored Gorilla: I am the pinnacle of the House of Evolution's science. I am Armored Gorilla. Your attacks have no effect.

Genos: The "House of Evolution"? What does it want with Y/n and my master?

Armored Gorilla: It is none of your business. And it is our rule that any who oppose us be eliminated without exception. Therefore, you will now be destroyed!

???: I don't think so.

Armored Gorilla: Huh?

Then without warning, Armored Gorilla was soon tackled by one of the Gorefield Zodiacs named Leo as he began clawing and tearing up Armored Gorilla with his amazing strength and power from his claws and teeth. Genos was surprised and shocked to see an otherworldly creature like Leo Gorefield as we go back to Y/n and Saitama dealing with the situation with Ground Dragon and the Beast King.

-Back with Y/n and Saitama-

Beast King: Hey, jerkoffs! What's with those stupid looks? Huh?

Y/n: (Snores)

Saitama: (Yawns) Being underground keeps you cool, but at the same time, it's nice and warm. I'm sleepy. Could you get lost?

Beast King: (Growls angerly before laughing) I see I need to teach you your place. Listen up! (Pulls out two clawed fingers to Y/n's sleepy face at the eye level) I'm gonna slice your eyes out with these! Then we'll see if you're both just a couple of smartasses and just so you know The Beast King never lets anyone off easy.

Then suddenly, while sleeping, Y/n got up from the ground, shocking Ground Dragon and the Beast King, who didn't even flinch when he got up from the ground before stomping his foot on the ground, bring Saitama back up from the ground and repairing the pavement under them.

Y/n: Well, enough fooling around then. (Eyes glowing in a blood red color) Listen up, if you wanna apologize, now's your chance. (Demonic Voice) You stupid and clumsy oafs smashed my ceiling! You could've used the front door like a normal person instead of barging into my apartment through the ceiling like an idiot!!

Saitama: He has a good point there.

Beast King: Humph. Is that so? Then behold the true power of the mighty Be-

Saitama: Aw man. I got dirt in my special place.

Beast King: Hey, are you listening?

Y/n: Let him just shake off the dirt, then we can fight.

Saitama: Hold on. I almost got it.

Beast King: You done yet?

Saitama: One sec. (Dusts himself off before placing his belt back) Ok I'm done.

Y/n: Alright then. Now where were we?

Beast King: Okay...then once again, prepare yourself to witness the true power of the Beast King! Lion Slash!

Then he used his powerful claws to slash at Y/n and Saitama, only for them to duck down, resulting in the claw marks to destroy a building behind them as the Beast King continued attacking them with his Lion Slash attacks while they both began dodging his attacks with lightning speed.

Beast King: Such is the law of the jungle! And you two are next!

Then the Beast King charged up his power to the MAX, much to Ground Dragon's warning that he can't kill them as an order from their boss at the House of Evolution.

Ground Dragon: No Wait! Don't kill them yet!

He didn't listen to him and unleashed his most powerful move upon both Y/n and Saitama.

Beast King: Lion Slash: Meteor Power Shower!!

However, upon releasing his most powerful move on Y/n and Saitama, they both just dodge his attack like it was nothing until they both unleashed one of their killer moves at Beast King at the same time.

Y/n/Saitama: Consecutive Normal Punches.

The result of the two of them doing a Double Consecutive Normal Punches on the Beast King, he was instantly killed as his whole torso was blown away, leaving his own legs intact as all his remains rained upon the two heroes before they both looked at Ground Dragon with a menacing glare, mostly from Y/n that looked at the mole with glowing red eyes and a wicked Chesire Cat like grin on his face as Ground Dragon immediately went underground to retreat until Y/n decided to follow him down underground to prevent him from getting away unpunished.

Ground Dragon: N-No one told me they'd be that strong! It's best we retreat now and regroup...

Then without warning, Ground Pound was stopped by another creature, who is actually Y/n in his Gorefield form as he uses it to kill Ground Dragon to stop him from getting away and getting payback on him for tearing up his ceiling on his apartment.

Y/n: (Gorefield Voice) Found you!

Ground Dragon: No Impossibleeeee!

With that, Y/n killed Ground Dragon and came back out in a different Gorefield form, that got Saitama's attention.

Saitama: Huh? (See Y/n in his Gorefield form) Whoa!

Then Y/n immediately changed back into his normal self before he and Saitama found Genos and Leo Gorefield interrogating Armored Gorilla for any information about the House of Evolution as the cybernetic gorilla's arms and legs are ripped apart by Leo Gorefield while his body is scorched up by Geno's Incineration Cannons.

Genos: Answer the question or be eliminated. Your choice.

Leo Gorefield: And don't do anything just to save yourself, you ape! This is sacred ground, and you must respect it!

Armored Gorilla: It is you two who will be eliminated. You blithering fools! I am the third most powerful fighter in the "House of Evolution." At your power levels, you will never beat the Beast King, the second most powerful fighter. You two will be destroyed.

Then Y/n and Saitama walked up to them with what is left of the Beast King as Y/n is holding up his eye by the strand, showing Armored Gorilla that they just killed the Beast King and the other animal fighters, leaving only him and the most powerful fighter in the House of Evolution.

Saitama: Is this the guy you mean?

Genos: I believe it is.

Leo Gorefield: Apparently so.

Y/n: Eh, he's not so tough at all in my opinion.

Then Armored Gorilla went silent for a moment until he finally decided to cut the whole robot voice thing and tell them everything about the House of Evolution to save his life from certain death.

Armored Gorilla: (Scared) Hey! Look, I'm sorry! I'll tell you everything, just don't kill me!

Y/n: What the--? What happened to your high-tech robot voice?

Armored Gorilla: Sorry, I was just trying to sound cool.

Y/n: Seriously?

Location: The House of Evolution

After the fight from those monsters that are from the House of Evolution, the professor, Dr. Genus, who was behind all of this came into the lab with the many clones of himself witnessed in great shock when they all found out what happen to the House of Evolution's elite fighters.

The Clones: What do you mean? The hit team got wiped out. How did this happen? Wait, don't jump to conclusions yet. It may be a mistake. Verify the report immediately! Right away. Be careful!

Doctor Genus: What's all the commotion?

END OF CHAPTER 11

TO BE CONTINUED IN CHAPTER 12