Hey guys, Crescent Rider here. And I welcome you to my One Punch Man Fanfic Story. But before you get started, Here's a small explanation of things regarding the story.

First, Nadia 'The Little Magus' is my Main Crossover Character. If any of you guys have a Requested Anime for her to appear in, You may leave it in the Review Section or PM me if you wish. But know that I have the right to decline your request. So don't force make anything I don't like.

Second, This Story was first published in Wattpad. But I will publish the other chapters soon.

And lastly, Don't Flame this story. If you don't like what you read in this story, You may go and find another story that might fit your taste. I won't force you to read what I make.

Disclaimer: The only thing I own is my OC Character. Everything else belongs to its respective owners.


In the late evening, Saitama is seen walking his way back to his apartment building in City - Z's Ghost Town. But along the way, he had spotted something peculiar in a nearby alleyway and went to get a closer look.

There, he had spotted a 10-year-old girl lying on some worn-down mattress and used a small backpack as a pillow. The girl has golden, neck-length hair, wore a stained turtleneck, skirt, rubber shoes, and a necklace with a symbol of eight swords in a circular position.

Saitama then walked towards her to get a closer look and was planning on poking her cheek to see if she is alive or not. But he soon stopped when a red spear pops out from the darkness and pointed towards his face.

"I wouldn't do that if I were you," A voice spoke out,

Saitama looks upward and saw a blue-haired, red-eyed man sitting right next to the girl. He was wearing deep-ultramarine body tights, metallic pauldrons, a metal plate over the lowest point of the abdominal section, metal earrings, and his hairstyle is a rattail that reaches the middle of his back.

"She's resting. Leave her be," The spearman said,

"Who are you?" Saitama asked,

The spearman simply hummed, pulls his spear away from Saitama's face, and rests it onto his shoulder.

"The name is Cú Chulainn," The spearman introduced himself, "This little maiden's Servant. What's your name?"

"Saitama, I'm a Hero for fun," Saitama replied, then turns his eyes on the sleeping girl, "So what brings you two here?"

"Well, she heard about details regarding this part of City – Z and she decided to head here to find someplace she can call home," Lancer answered, "I, on the other hand, simply followed her wherever she plans to go,"

"Does she have any parents?" Saitama asked,

"Her home was assaulted by some powerful being, her parents died protecting her, and she's the only member of her family tree. No relatives, Godparents, or guardians to watch over her," Cú Chulainn explained, "She tried asking different people for shelter, but I have lost count on how many times people have rejected her request,"

For some apparent reason, Saitama notices Cú Chulainn tightening his grip on his spear. Meaning that the latter is displeased with the girl's current situation, but then he loosens his grip as he calmed down.

"However, despite everything she has been through. She's not the type of person who would hold a grudge over something so little to her," Cú Chulainn closed his eyes, "Even if the world rejects her, She's willing to help anyone she wishes to help,"

Saitama glanced then towards the young girl. But this time, he notices that the girl was starting to wake up as she slowly rose from the mattress, rubbed her eyes a couple of times, and yawned a bit.

"Cù-san, who are you talking to?" She asked tiredly,

"Just some hero passing by," Cù Chulainn responded,

The young girl then turns toward Saitama and squints her eyes until her vision adjusts correctly. After that, she gets a stare towards Saitama, more specifically his bald head.

"Who are you?" She asked,

"Saitama, Nice to meet you," Saitama replied, offering a handshake to her,

"Nadia, Nice to meet you too," The Girl said, and shook his hand,

"Nadia?" Saitama asked,

"That's my name," She said, stood up from the worn mattress, and wore her backpack, "Well, it's been nice knowing you, Saitama. Bye,"

Nadia was about to leave with Cù Chulainn following beside her. But Saitama decided to help her out with her problem

"Wait," Saitama called out, and Nadia stopped in her tracks, "Do you even know where you're going?"

Nadia sighs then turn to him along with Cù Chulainn.

"Not really, I only hear about this part of the city and decided to find someplace to stay," Nadia said, "The other cities were a bit hard to live in with some or most Monsters appearing in those places. But what about you? What brings you in this part of City - Z,"

"I live around here. My apartment is not far from here," Saitama said, "If you like, You could come with me,"

These words caught Nadia and Cù Chulainn off guard. The latter began suspicious of the bald hero while the former remained surprised.

All three of them stayed silent for a moment. But that all ended when Nadia's stomach suddenly growl in hunger, causing her to blush in embarrassment.

A few minutes later...

As soon as Saitama went back to his apartment. He sat down and watched Nadia as she filled her stomach with a pork cutlet and bowl full of rice.

As for Cù Chulainn, he simply watched his master eating away her meal like no tomorrow. Saitama asked the spearsman if he wanted to eat something as well, but the latter refused since he sets his priorities to his master first before himself.

A moment later, Nadia finishes her meal, grabbed a glass of water next to her bowl, and drank it all in one go.

"Ah... Now that was refreshing," Nadia commented, "Thank you for the meal, Saitama-san,"

"Your welcome," Saitama replied,

"However, I'm afraid I don't have anything to give you in return," Nadia then gave a smile to the later, "Sorry,"

"It's okay, I just wanted to help you that's all," Saitama replied,

"Also, do you have an extra futon I can sleep in?" Nadia asked,

"It's on the cabinet," Saitama said, pointing at the said cabinet,

Nadia then stood up from the floor, went to the cabinet, and saw the folded futon on top of it. But it was too high for her to reach it.

"Do you want me to get that for you?" Saitama asked,

"No thanks, I've got it handled," Nadia replied,

What comes next had surprised Saitama when all of a sudden, Nadia flew up from the floor, pulled the futon out of the cabinet, then flew down to the floor again.

"You can fly?" Saitama asked,

"I can, but I only use it when I want to go to places I can't reach," Nadia said, as she unfolds the futon onto the floor, "What about you?"

"What about me?" Saitama questioned,

"What's your power?" Nadia asked as she sat down onto the futon with her legs crossed together, "I heard that this part of City - Z is where the strongest monsters are gathered. If you live here, Then what do you do when you're up against a monster here?"

"Oh, I punch them," Saitama plainly replied,

"... Come again?" Nadia said with a surprised expression, while Cù Chulainn raised a brow at this response,

"I punch them," Saitama repeated,

"That's it?" Cù Chulainn asked,

"Yes," Saitama replied,

"You... punch them?" Nadia questioned,

"Do I have to repeat myself?" Saitama asked,

"N-no, You don't have to. I just didn't take it very well. That's all," Nadia said, then started to yawn again, "But anyway, Can I use your bathroom?"

"Sure," Saitama replied,

Nadia risen from her futon, grabbed her backpack, and went to the bathroom. A few moments later, Saitama noticed a blue light glowing from his bathroom then it dies out afterward.

When Nadia came out, she was now wearing yellow pajamas with a black cat logo pattern rather than her usual clothing.

"Now I can go sleep," Nadia commented,

"How did you change your clothes so quickly?!" Saitama exclaimed,

"I just used my Spatial Magic. That's all," Nadia answered,

"Oh, okay," Saitama said and goes back to his usual expression,

Then Nadia turns to Cù Chulainn.

"Cù-san, you're dismissed for today," Nadia ordered,

"You sure you'll be fine without me around?" Cù Chulainn asked,

"Umu~ I'll be fine," Nadia replied,

"Alright," Cù Chulainn said, and his body began to glow with the same light from earlier. But before he could go, he turns his head to Saitama.

"Hey, Baldy," Cù Chulainn called out, much to the latter's irritation, "If something bad ever happens to my master. I will come back and pierce your heart with my Gáe Bulg. Do you understand?"

"Sure," Saitama replied,

"Alright, See ya all later," Cù Chulainn said, then dematerializes into thin air.

"Where did he go?" Saitama asked,

"He went back to his world. Even though he has the ability to stay in this world for long as he, please. He still needs to replenish his energy the next time I summon him," Nadia answered, then she lied down on the futon, and tucked herself in, "And the same applies for me,"

"I see. Is that why you're going to sleep now?" Saitama asked,

"Yep," Nadia answered, "Good Night, Saitama-san,"

"Good Night," Saitama said,

Once Nadia closed her eyes and went to sleep. Saitama stood up from the floor, cleaned up the table, and went to sleep as well.

Meanwhile, In City - A...

Executives of the Heroes Association are currently in a meeting regarding an important matter.

"We've been getting reports from C-Class, B-Class and even A-Class heroes that they've spotted a few monsters accompanying a child in Multiple Cities," Executive #1 said, "Is this true?"

"Yes, We've also managed to obtain several pictures regarding the matter as well," Bespectacled Worker replied, then placed his phone onto the desk, and several pictures pop up for the Executives to see.

The first picture was some 8 feet black muscular monster and a child with blond hair riding on its right shoulder, the second picture was the same child being carried by some black knight wield a pole and a few monster corpses are seen behind them, and the third picture is the same child asleep on a big gray wolf and a headless humanoid wielding hook swords is seen standing beside them.

There were other pictures of this girl being shown to the Executives, as well as live footage of these monsters killing other monsters scaling from Tiger to Demon without causing any havoc or civilian casualties.

The Executives were baffled by this and some made assumptions that the girl is either capable of defeating them or controlling them. But either way, she must be a strong individual to handle such monsters despite her young appearance.

"Where is this child now?" Executive #2 asked,

"She was last seen in City - R, But her exact location is hard to track. There's a possibility that she'll make her way in one of these three cities: City - B, City - Y, and City - Z," Bespectacled Worker reported,

"Then I assume everyone here knows what to do when she reappears again?" Executive #1 questioned,

The other executives conversed with each other, made several nods to Executive #1, and all stood up from their chairs.

One by one, they all left the conference room until the Bespectacled Worker and another Executive was left in the room.

"Do you think it's a good idea, Sitch?" Bespectacled Worker questioned,

"In my opinion. It's quite beneficial," Sitch said, then looked towards the picture, "But it's a risky one as well,"