This is one of a couple of story ideas I've had for a while, so this story will only have 1 chapter until it gets enough follow, favorite and review. I will have more 1 chapter stories that I will continue on if it gets popular enough, so check it out when it comes out. but now to this story

My first language is not English. I don't own MHA or Chainsaw Devil

Izuku Midoriy was not having a good day, first the teacher had told the class that he was applying to go to U.A.. Then after Kacchan had burned his notebook, and now there's a sewer monster trying to enter his mouth and take over his body. These were his thoughts.

My body... There's no strength... I'm dying Am I dying? I don't want to die. Someone, anybody, save me, I will do anything!

It was that thought, and mortal danger he was in, opened something that should not be or able to be opened. And a voice answered him back.

I will grant your wish, I will give you whatever you want, all I ask is that you summon me. NOW.

Izuku, too scared to think clearly, could only say one thing.

Yes! I want to see my mother! (Crying noises)

It didn't even take a second before something hit the sludge villain and pieces of him hit the wall of the underway. Izuku fell to the ground and started throwing up all the mucus.

Thank God, I'm saved, I thought I was going to die, a hero must have heard us and come to save me, I wonder if I can get his autograph?

"Deer god, what what are you!?"

Izuku couldn't think about it anymore as the villain who attacked him screamed in horror. And looking up from what he had just vomited, he understood why.

In the ceiling of the tunnel, there was something covered with a yellow gas. It had the shape of some thing with long arms, something protruding from its back, and it's head looked like something of a canine animal, with large glowing red eyes, but there was something in him that said it was wrong, that it was something more human.

The yellow gassy figure attacked the sludge villain with what looked like a claw made of gas, but it obviously wasn't just gas with it, because the claw had a direct impact with the sludge villain, smashing him against the wall. Sludge villain then began to scream and Izuku could see the sludge begin to bubble and a chemical smell that burned Izuku's nose covered the tunnel, but before he could break down everything that has happened, a manhole's hatch flew into the air.

"I AM HERE!"

The number one hero, All Might. Izuku's favorite hero and the man he looks up to the most just rose out of the sewers.

"Um…What's going on here? And what is that smell". All Might looked at the abnormal situation before him. First there's the villain he's been chasing after now lying on the ground screaming in pain, then there's the boy who looks like he's vomited pieces of the Sludge villain. With this, All Might was able to reach a logical conclusion.

"Ah, young one, are you ok, do you need a doctor," said All Might as he began to pack the sludge villain into a soda bottle.

Izuku, overwhelmed by everything that has happened in the past minute, could only say one thing. "AllMightI'myourbiggestfanit'ssuchanhonortostandinfrontofyou" The words went too fast and All Might couldn't keep up, so he focused on the villain.

After a couple of minutes of All Might trapping the villain in a soda bottle while Izuku muttered in the background, All Might walked up to him and started questioning him.

"Ah young man, before you ask after my autograph or anything, I must inform you that you should not use your Quirk on others, especially such a dangerous one, but I will let you go with a warning because it was souly for self-defense. But it's still against the law, so remember that, ok"

That made Izuku stop, he had been accused of using his Quirk, a Quirk he doesn't have. "W-What, but I didn't".

"Don't worry young man, it was an act of self-defense and I won't take you to the police for protecting yourself, but you could have been a little careful, the villain was in some pain".

"No no no, you don't understand, I am… I am". His voice trailed off, a question he wants the answer to, but first he has to say something that will make everyone look down on him to All Might, his hero. "I am, I am Quirkless".

That word silenced the tunnel, neither of them said anything, until All Might broke the silence.

"You don't have a Quirk?"

Izuku nodded back, afraid of how he will react.

"Well, who did it then?"

"I…I don't know".

"Huh?"

"It was this figure that was made of. No, he was covered in smoke or gas of some kind. When he attacked the villain, it was like it was something physical, but the person was covered with this yellow gas".

"Hmm, I see," All Might said as he scratched his chin."I haven't heard anyone with that description, I'll have to check later. Farewell young man, I need to take this villain to the police". With that, All Might turned around and began preparing to jump away.

"Wait, already?"

"Pros are constantly fighting enemies and time"

"What… there are still…things I want to ask…"

"Well then", just as All Might was about to jump, Izuku took a step forward in an attempt to grab All Might's leg. If things had gone as planned, Izuku could have gotten One For All and become the next Number One Hero, but unfortunately he slipped on what he had vomited before and fell, and the world would never recover from the effect it has.

"I'm counting on your continued support!" All Might said as he jumped away.

Izuku lay on the ground, disappointed in himself. He couldn't ask his hero if he could be a hero, if there was one person who believed in him. While Izuku was in his head, something rose from the ground, and that something said in a feminine tone.

"Hey! Boy"

Izuku turned in the direction the voice came from, and what he saw shocked him to the core of his soul. Up there on the wall, there was something that looked like a corpse standing on two legs. One leg was completely fleshless, while the other has more muscle that looks like it's growing and spreading to the rest of the body, and it was the same with the upper body. There were muscles on the chest but not enough to cover all the organs that Izuku could see( And never unsee). There was enough around the neck to make the vocal cords work, but how the skull only had one eye and a shrinking hole where the brain is visible through, which made Izuku want to throw up again.

But that's when he figured it out, at first he thought it was someone with a mutant type of Quirk, but now he understood that the person in front of him had an regeneration Quirk, and… She would, he would guess based on her voice, be regenerating from something that must have really hurt her if there was so little left of her body.

"So, you have summoned me, what do you desire, power, weapons, a horrible death to your enemies. I will give you whatever you want".

"Huh?"

Izuku was confused, wish? Force? A horrible death to my enemies? And I have summoned her? I don't even know who she is. It was then the memory of the voice from earlier came to him

I will grant your wish, I will give you whatever you want, all I ask is that you summon me. NOW.

Was it her? But it didn't sound like her voice. It sounded like something with a mutant type of Quirk that makes it a few times bigger than a normal person and there with a deeper voice, plus it sounded like it had been smoking a lot. And her Quirk is regeneration so it can't be voice change or telepath.

"Hey, stupid human boy, are you deaf or what!" said the regenerating woman as she held her hand up to her non-existent ear. Which made Izuku wonder how she heard him.

"Uh, oh, no. What do you mean?".

She let out a heavy sigh before continuing. "You summon me, I give you something you want, and then we go our separate ways. It doesn't get much simpler than that!".

"What I want". The memory of the video that he has seen so many times was still clear to him. How All Might saved everyone with a smile, and that was all he really wanted. "I-I want to be a Hero, that's the only thing I ever wanted! Even if I don't have a Quirk, even if you can't help me, that, that's what I wish for!". Izuku didn't know when he started screaming, but now he does, screaming out everything he has suppressed all these years.

"Ok, it shouldn't be difficult".

Izuku, who had started looking down at the ground in shame at saying he was Quirkless, now looked up so fast he almost broke his neck. The regenerating woman now had muscles almost all over her body and skin had now started to form in some places, and the hole in her head was gone.

"Sure, no problem, I don't even understand why you worry about a quirk, all you have to do is save someone, it's easy to fix". The regenerating woman jumped down from the wall in front of him, and that's when he realized something.

Now that the skin is coming back, he realized that she is naked and the only reason he hasn't seen anything yet, was that she didn't have anything yet. Izuku tried to warn her, but then he realized that he has been talking to a naked girl, and that made him nervous so he couldn't speak. And her moving closer to him didn't help matters.

"Ok that's a deal, I'll help you become a hero, but first I should give you my name, after all it doesn't look like you know which Devil you've summoned.'

That word made Izuku stop. A Devil, what does she mean by that? Wait! Don't tell me she's a Villain!

Izuku looked up at her face, calling her woman might have been a bit hasty because she looked like she was around his age. Long blonde hair and a sky blue eye, Izuku would call her Foreign Beauty. If it wasn't for one eye still hadn't regenerated and was a hole, and her smile was that of an apex predator.

"My name is -

I didn't have a good day, Master War told me that she and her sisters with all Weapon Devils will fight against Chainsaw Man. I of course asked if I could accompany her to fight against such a powerful enemy, she said yes. I, Nuke Devil and Master War met up with the rest of the Four Horsemen, and the Weapon Devils and together we attacked Chainsaw Man... It didn't go as we had hoped.

The Weapon Devils could barely keep up, the Famine Devil did everything possible to get Chainsaw Man under her effect, but Chainsaw Man was unaffected and just ate a Devil to recover, I don't even remember what a Nuke was .Control Devil took control of all the Weapon Devils and made them more coordinated with each other, only by luck I didn't come under her control. Master War and the Death Devil went into melee, due to the war, Master War had gained a lot of power, especially with Nuke Devil and my birth.

I tried the best I could, melee, long range weapon and also chemical weapon. I used everything I could to help take down the Chainsaw Man, but no matter how many times he was killed, he would always come back to killing other Devils.

That's when it happened, Death was recovering from an attack, and Chainsaw Man gott in an attack that split Master War in two. I watched as Chainsaw Man began to eat her, her memories began to fade away, so I stopped him. I went into melee and used all the firepower I had to remove Chainsaw Man from Master War, I succeeded but at a great cost.

Master War managed to get away from Chainsaw Man, but I took her place and Chainsaw Man started eating me. It was an indescribable feeling, to have one's name and all it means taken away from reality, yes the pain is truly indescribable. But that's when I felt it, a tug.

A tug from something that tries to summon a Devil, it can only be for two reasons: 1, a human that the Devil has made a contract with trying to summon the Devil or. 2, With a ritual from the Hell Devil to summon a Devil. And I don't have anyone that I've made a contract with so that means.

My body... There's no strength... I'm dying Am I dying? I don't want to die. Someone, anybody, save me, I will do anything!

Huh, he's dying? It's good, people in danger do really stupid things and are easy to fool. I can easily get him to summon me with no problem.

That's when jagged teeth began to cover my view and I remembered that I'm dying too.

I will grant your wish, I will give you whatever you want, all I ask is that you summon me. NOW.

And the man answered back.

Yes! I want to see my mother! (Crying noises)

Damn, he's a crybaby, but now that we've both accepted the summon…

And with that I was saved from the Chainsaw Man, but where I ended up I would never have guessed.

What little was left of me ended up on the street, and I immediately realized why he was in such a hurry, the human boy was attacked by what I would guess was the Sewer Devil. I used the power I had and made gas around me in the shape of my body and attacked the Sewer Devil. He was weak, I didn't even have to kill him, one attack and that was it, he was on the ground in pain. There was a big person who came later but I didn't have time for that, I was weaker than I thought and landed on a couple of flowers behind a wall.

I lay there wondering if I should have attacked the boy instead and drank his blood, but now it's too late, there's no blood or corpse to take over. While I was thinking about what I could have done differently, all the flowers around me died and I saw something, a human would probably have missed it, but I knew what it was, a human finger bone. That's when I realized I was lying on a corpse, and I could take it over, I couldn't believe how lucky I was as I took over the body.

I rose from the ground almost only a skeleton, I had something to do, fulfill the deal. I'm a Fiend now, but when I was a Devil I said "I will give you whatever you want, all I ask is that you summon me" and that deal still stands.

I climbed up the wall and saw that the boy was still there, but now he is lying in a mixture of his vomit and sewage.

"Hey! Boy", I yelled and got his attention, his face when he saw me put me in a better mood.

I kept talking, hoping I could think of some way to trick him. "So, you have summoned me, what is it you desire, power, weapons, a horrible death to your enemies. I will give you whatever you want".

The boy just looked at me surprised and said "Huh?".

Huh? he said huh. Didn't he mean to summon me here? How the hell did he manage to summon me without knowing? Well, it will be easier to fool him so I don't have to give so much.

I waited for the shock to wear off, but apparently the human boy can't do it right, so I screamed. "Hey, stupid human boy, are you deaf or what!".

It worked and he answered. "Uh, oh, no. What do you mean?".

I couldn't help but let out a heavy sigh. "You summon me, I give you something you want, and then we go our separate ways. It doesn't get much simpler than that!". What is it with this boy? Does he not know what he wants, or is he too afraid to go against the law?

"What I want". The boy stood up, I waited for an answer but got none, just as I was about to threaten him to say something, he gave his answer ."I-I want to be a Hero, that's the only thing I ever wanted! Even if I don't have a Quirk, even if you can't help me, that, that's what I wish for!". After shouting out what I guess is his dream, he began to look down in shame at the ground.

Is that all? What does he want from it? Does he want to be famous? Impress someone? Feel better about himself because he sucks? Well, it's not that hard, just attack someone in my Devil form… if I have one, and then let him save the person, easy. "Sure, no problem, I don't even understand why you worry about a quirk, all you have to do is save someone, it's easy to fix"

I started walking closer to him and held out my hand, I also noticed I had breasts, I guess I'm a girl now, annoying but it could have been worse.

"Ok that's a deal, I'll help you become a hero, but first I should give my name, after all, it doesn't look like you know which Devil you've summoned".

"My name is Nazi Devil, or Nazi Fiend in this form".

Izuku looked with wide horrified eyes, now that the other eye had grown back, and it was red with a Swastika as pupil.

Nazi… Devil… She is a villain and a nazi! And that eye, did she get it from her Quirk? She must have got it? It grew back with everything else now that she's done regenerating… done regenerating

Izuku looked down, then immediately looked away as he realized she's got it all back now. "You! you are naked!"

The Nazi Fiend checked and said, "Huh, oh yeah, this body was a skeleton, ok boy, give me your clothes".

What Izuku didn't see, and what The Nazi Fiend didn't see coming, was that when she reached out to grab Izuku's clothes, one arm fell out of the other arm. She looked at it for a few seconds before shouting, "Crap!" and swung around two of her three arms.

"What, what's going on?" Izuku asked, still looking away.

"I have a fucking extra arm, it's not part of my abilities!"

"Huh!.. Wait, put this on". Izuku took off his jacket and gave it to The Fiend. She put it on while checking her extra arm, now calmer.

Izuku who could now look at her, but still red as a tomato. "Um, it wasn't there before, are you sure it's not part of your Quirk?"

The Fiend looked at him strangely and said. "What does my personality have to do with that?"

That made Izuku look at her in surprise, forgetting that she was almost naked. "Your Quirk, your Meta Ability".

"Meta ability? You mean my Devil powers?"

Devil powers? Wait, does she really believe she's a real Devil... That's when he put all the pieces together. The voice, and the attack that saved me, they both spoke of my desire, and got more than one power…

"Hey, can you do gas? Just want to check on one thing."

The Fiend looked at him strangely as she held up a finger, which became a metal tube like a gun and, small amount of the yellow gas came out.

"Oh my god, you don't have Quirks, you're a Devil, a real Devil". Izuku could hardly believe it, a real Devil is in front of him, naked, and cute. NO no no Izuku, don't call the Nazi Devil cute.

"So boy, can you tell me why I have an extra arrrrrrrrrrrm". The Fiend looked above Izuku with wide eyes, surprised at something.

As Izuku turned around, he realized something else, Devils, or at least this one, don't know what Quirks are. For MT Lady is walking, easy to see from a few streets away.

"It's not the Giant Devil...", said The Fiend.

"Yes, um, Ms. Devil, I need to explain something to you".

(An explanation about Quirks later)

The Fiend sat on the ground, and couldn't believe what she just heard, but what he was showing with his cell phone, she couldn't deny it, but she had a question that came up when she looked at his phone.

"Hey boy, what year is it?"

Izuku, without hesitation answered. "2256".

"Crap, I'm over 250 years into the future!"

With what the Fiend looks like after finding out, even Izuku felt sorry for her, even though she is a Devil and a Nazi. And that's when he figured it out. "I made a deal with a Devil!"

"Oh yeah, I had forgotten about that for a second there". And that's when she figured out, "Fuck, I promised to make you a superhero, fuck."

Izuku, now scared, said. "Oh, um, you don't have to worry about that". Plus I don't want to be helped by a Devil. But Izuku didn't say the last bit.

"Er, well, I need to. We made a contract, so I will have to stick with you until you become a Hero, a Pro fucking Hero".

"Stick with me?".

"Well, I don't know about this world, so you will have to take care of me, my hero", The Fiend said with the last two words emphasized as she teased him.

"You don't think I..."

"Come on, you can help me, please."

Unfortunately for Izuku, because of his desire to be a hero, he couldn't say no when someone asks for help. Especially when it's a cute girl, even if she's a Nazi and a Devil.

"Um, oh ok," Izuku said softly.

"Ok, let's go to your place"

"Um ok, wait huh!?"

"I need new clothes, and going into a store like this is not a good idea". Plus, I don't want to fight any actual superheroes here.

"Um, okay."

The two started walking towards his home, they had to take the less popular roads so no one could see him with a girl wearing only his school jacket. But finally it came to the hard part, Mom. They were standing outside the door, Izuku had stopped and to think of explanations. She had an accident with her Quirk, she was attacked by a villain.

(Bling, blong)

But before Izuku could pick one, The Fiend rang the doorbell.

"W w why did you do that?!"

"You took so long"

"What should I even call you, Devil won't work!"

And with that the door opened, and Inko Midoriya watched in surprise as her boy stood awkwardly next to a girl, who she later realized was only wearing her son's school jacket.

"Izuku, what happened to this girl". Inko's voice was a warning to Izuku, he knew that if he didn't answer correctly, he would be in danger.

Unfortunately for him, all Devils have an instinctive hatred of humans and love to see them in pain, any kind of pain, and the Nazi Fiend wanted to try a new one.

"Oh, your son was so wild, he pushed me up against a wall and ripped my clothes off my body in an alley," said the Fiend while she had her head on her cheek and rosy cheeks.

The two Midoriya watched with open mouths and red faces, Izuku didn't know what to say, until he heard someone.

"Izuku". There was a dark aura around Inko Midoriya, And Izuku knew that the Devil had doom him.

"Just kidding, sorry, I couldn't help it, I had a Quirk accident and your son wanted to help me".

The killer aura disappeared and Inko went back to her usual self. "Oh, of course, I've taught my Izuku to always help when a young lady needs help, rather how Izuku?"

"Yes mom". Izuku had a feeling he wasn't out of it yet.

"By the way, is there something wrong with your eye?"

Izuku looked at what his mother was looking at and realized what was happening. The Fiend had her eye closed, the one with a Swastika in it, and it looked like she was having trouble with her eye.

"Oh it's nothing, but if you'll excuse me, I'd like to wear some clothes".

"Oh, of course, I think I have some old clothes that might suit you, um… Excuse me, I think I didn't catch your name".

"Oh, it's Tanya, Tanya Stroheim Miss".

"Oh it's Inko, Inko Midoriya. Um, Stroheim, is it German?".

"Yes madam".

With that, Izuku's mother and the Fiend disappeared into the house, leaving Izuku behind. Who could only wonder where his life went wrong.

In the police station sat Toshinori Yagi, AKA All Might. After taking in a Villain, all time for the day had ended, and luckily nothing had happened after that, he sat and drink coffee before going back home, but before he finished his friend came up to him. Naomasa Tsukauchi, a Detective who works with the police, and a very good friend of Yagi

"Naomasa-san, how are you doing".

"Hey Yagi, there's something I need to ask you about the guy you just brought in."

Yagi, who could sense in his friend's tone that it was serious, took it much more seriously now. "Yes what is it?"

"What happened before or while you caught him".

"Um, yeah. There was a moment he got away from me and attacked a boy, there was something covered in gas that helped him, but I don't know who.

"Um… gas, can you tell me about that person?"

"Unfortunately not, he disappeared before I arrived, but there was a chemical smell in the air when I arrived, why did you ask?"

"I see, it was a pity, you see. We have found a chemical in him that was the cause of his pain, but what worries us is the chemical". Naomasa looked more serious as he said that, and Yagi understood why. "The was Sulfur mustard, or it's more famous name, Mustard gas".

"That made Yagi stop. Mustard gas, a chemical weapon during WW2, even today people know about it. "How, how can that be?"

"From your description, it looks like a Quirk is behind it, but we don't have a Quirk on record that can make Mustard gas".

"This is not good, if it's a Villain who has it, the damage can be catastrophic".

"I know Yagi, did you get the name of the boy?"

"Um…". Yagi looks a little embarrassed, knowing the boy's name would help a lot. "No, all I know is that he is Quirkless".

"Quirkless… Toshinori, what if he's not Quirkless, what if he's hiding his Quirk, or he just found out and has no control".

"It is-"

"I think we should hurry to find him, I don't know which is true, but we need to find him".

And that's it, I hope you like the idea. Izuku will find out more about Devil after this and will summon more to make contracts with, so he can get a Quirk. And everything will go downhill from there.

If you're wondering why Nazi Devil, well. It's because it's fun to have the Nazi Devil help the cinnamon bun Izuku become a Hero. I also had the idea that it's a Devil running away from the Chainsaw Devil that Izuku first summons, Maby the AIDS Devil might be fun for Izuku to summon, but I think this is better. Plus there is less risk of a Nazi reading this and getting mad at me than someone with AIDS

Why I didn't take a canon Devil, more freedom for character, and I have plans to put some canon here as well, like the Future Devil.

"The future rules!"

Also, can you guess where the name Tanya Stroheim comes from?

Follower, Favorite and Review for Chapter 2 and more