As his mom went out the front door, little 4 year old Izuku heard his mom said, "I'll only be gone to grocery store for 10 minutes. Don't open the door for any strangers."

"Okay, Mom!" Izuku called out to her from the living room.

At the sound of the door closed, he went back to watching his All Might cartoons with his All Might action figure in one hand.

There are three things that usually filled little Izuku's mind: All Might, becoming a hero, and quirks.

I will get my quirk someday, Izuku thought to himself. And maybe Kacchan and his friends will like me more too.

A little frown did appear on his face when he remember their time together, especially the more... negative aspects like how he earned the nickname 'Deku.' All of this simply because he's late on getting his quirk. I'm sure of it, right? They'll like me if I get my quirk.

He stared at the television, not really paying attention to what's on it anymore. Then he heard an unfamiliar voice. "Whoa, what's that?"

Izuku nearly jumped out of his seat. It sounded like there was another person right next to him, but turning his head to the side revealed a... portal? A light green portal slightly bigger than his own head.

His eyes widen with excitement. "Is this my quirk?"

"Hey, I heard somepony in there." Another unfamiliar voice said from the mysterious portal.

"It's me!" Izuku eagerly look through the portal to see what's on the other side.

Confusion hits him like a train. He was simply expecting his quirk was to conger up portals to places on Earth, but was there a place on Earth where there are talking horses with horns on their heads?

No, wait, they're... 'unicorns,' right? Izuku thought, vaguely remembering some of the girls from his school talk about them sometimes.

Through the portal, the little boy could see what looks like a park and 6 small unicorns. So small in fact that they're at least a head shorter than him and they were honestly adorable to him.

"Look!" A mint green unicorn shouted with a big grin, practically bouncing towards him. "It's a human! I told you they're real."

"I thought you said they don't have colorful hair, like green." The blue and yellow one said, a little skeptical.

"Maybe he dyed it."

"What do you want?" The purple and pink one demanded, then Izuku heard her murmur, "Why aren't our moms paying attention to this?"

"I think I got my quirk." Izuku said, poking at the portal's edge. "I'm trying to figure out how this works." Then he added as a whisper to himself, "If it's my quirk."

The little unicorns look at each other in confusion, then look at him.

"What's a quirk?" The pink and white one said.

"Well, by definition, a quirk, as a noun, is a peculiar behavioral habit or an acute hollow-" The red and cream colored one was interrupted by the pink one, who said, "Are you repeating that from a dictionary?"

"There's nothing wrong with reading a dictionary once a while."

"Oh, so, you do-"

"Let's get back on topic here!" The purple one shouted suddenly, then turned back to Izuku. "What do you want anyway?"

"I-I just wanted to see what it's like here since it's my quirk. Did I do something wrong?" Izuku wasn't too sure what's going on.

"Come on, Twilight. It's obvious that he's curious." The green unicorn said, approaching the portal.

"Lyra, what are you doing?" The purple one, Twilight, asked, raising an eyebrow.

"What? Aren't you curious about what's on the other side?" Lyra said with a tilt of her head.

"And leave without telling our moms? No!"

"Don't be such a wet blanket. I mean, they're not even paying attention to us." They look behind them, seeing how their moms are happily chatting at the bench, not really paying attention to the group of little fillies.

"See?" Lyra said, then attempted to stick her head into the portal, but something held her back. It resembled some kind of thin, clear film, leaving crinkles and stretch marks until a pink aura wrap around Lyra's tail and pulled her away, causing the magic barrier to 'disappear.'

"Stop doing that!" Twilight quickly stood in front of the portal, blocking their way. Izuku looked fascinated by her magic for a moment until he was distracted by her determination to not interact with him. "Alright, we can't get in, so we shouldn't even try."

"Why are you so against this? I thought you would love to research this." Lyra pouted. "Think of all the cool stuff we could discover there."

"I just think this is dangerous. From your books about humans, it said that humans don't have magic like our own. While not many unicorns have the capability to create portals on magic alone, it's still magic, so what if this is all a trick or something?"

"You're just jumping conclusions."

Izuku looked at his hands, then back at the fillies. He wasn't too sure if he could attempt to close the portal, say something, or continue to watch this.

"I'm sorry for being a 'wet blanket,' but I wanted to make sure Equestria isn't in danger because we carelessly entered a completely different world."

Izuku slowly reach his hand into the portal, not being pushed back by that magic barrier from before.

"Then why don't we just have a chat with him at least? Then we can see if his world is dangerous."

For a moment, Twilight looked rather annoyed at her suggestion, but begrudgingly turned to him, only to bump into his still outstretched hand. Lyra's eyes seemed to sparkle with delight at his hand while Izuku didn't pulled back.

With his hand on her head, Twilight said with annoyance clear in her voice, "What are you doing?"

He paused for a moment. "...I wanted to pet you." It's not a complete lie. Sure, it wasn't his intention, but in the back of his mind, he wanted to know how they feel. They look soft.

Before Twilight could say another word, Izuku started to affectionally rub her head, hoping it would calm her down. She did look rather unamused at this, but after a while, the little filly closed her eyes, seemingly enjoying the petting session. Izuku smiled, happy with his work.

Lyra looked rather jealous while the other four looks fascinated by how relax their friend became. So relaxed in fact, she didn't realize the portal slowly expanding until it's her size, moving closer to the distracted unicorn. The five fillies wasn't too sure what to do as Twilight felt soft fabric instead of the hard ground of the park.

Twilight blinked when Izuku stopped, finding herself in a new environment. She turned around to notice her friends through the portal. She tried reach her hoof out into the portal, only to be met with the thin magic barrier.

This was when they knew they're in trouble.

"Mom!" The varied blue unicorn yelled to the group of mares while Izuku tried to push Twilight back in, meeting with no results of returning her.

"Sorry it took longer than I thought, Izuku." Inko said, entering the apartment. "The line was quite long-" She stopped when she entered the living room to be greeted with her son trying to push a little purple unicorn into what looks like a rip into the fabric of spacetime continuum. Both of them looked back at her with tears in their eyes.

Saying she was confused was an understatement.

"Princess Celestia," A royal guard peeked into the dining room. "We may need your help."

A piece of cake froze in the air before the princess of the sun could eat it. Placing the fork down, she asked, "What is it?"

"Well, you see..." He seemed to try to form his words until he finally said, "A strange creature has kidnapped your student-"

"WHAT?!" He flinched at the sudden increase of volume as the princess turn to him so fast that it could have given her whiplash. "Aren't the guards doing something?!"

"Well, the creature trapped her into his portal and we have no way to entering or taking her out even with our magic, so we thought it would best if you gotten involved." The guard hoped she wasn't going to give them a hard time for this... or at least not stab him with a fork.

"Take me there immediately."

"Of course."

As the two ran all the way to the park, Celestia could only ask questions about the creature and hope Twilight was safe. Apparently, the creature was a human from the guard's description, which only made the princess have more mixed feelings about the event. What did the human want with her student? Were they targeting her by using her student as a hostage? Did they want ransom? She's willing to do anything for student.

Towering over her ponies, she could see the portal from where she is, and this human... is a child. A crying child trying to comfort her student, who was also crying, and right behind them was a teary eyed woman, panicking at the situation.

Princess Celestia will be slightly forgiving to the guards for the misunderstanding since not many ponies were knowledgable about humans unless they were actively researching them, like one of her student's friends, Lyra. Only slightly though since apparently two creatures who've been crying for who knows how long is a threat to them.

Despite some lingering annoyance at the situation, Celestia calmed herself down, knowing she needs to comfort the two children down.

Worry ponies slowly separated to make a path towards the little portal as Twilight smiled at the sight of her, but the green haired boy looked rather frightened. It's understandable since he probably thinks he's going to be in trouble, either from his mother, from the princess herself, or maybe both.

"Hello, Twilight." Celestia said with a small smile.

The little purple filly smiled back, looking hopeful. She pressed her front hooves onto the portal's stretchy magic barrier. "Princess Celestia!"

The princess of the sun look at the little boy, who's tearing up a bit. "And this is...?"

"I-Izuku Midoriya." The boy lightly sobbed. "I-I'm sorry! I didn't mean to do this. I just got my quirk so I don't know how to use it."

Mild confusion appeared in the princess's mind, though she simply figured a 'quirk' is his world's version of magic.

"How did you get it?" Celestia asked, continuing to smile at him.

"W-Well, I was just thinking about my... friends and a portal appeared here." Izuku explained, wiping away a few tears.

"And how did my faithful student enter in your portal?" The princess noted the barrier preventing her student from returning back home.

"I petted her head."

"You... petted her?"

A couple of ponies murmured in confusion as Izuku nodded. Even his mother (since she looks so much like him) looked rather puzzled by this.

"Yeah, she looks soft. I didn't mean anything bad by it." Izuku said nervously while Twilight looked embarrassed by the situation.

"Then can you pet her again?" Princess Celestia suggested.

"Okay, I'll try." Izuku hugged Twilight from behind. He started to pet her head, whispering teary apologies to her.

Twilight's expression slowly turned more calm despite feeling some of his nervousness through his action. Just as she became calmer, the portal gotten closer to her, allowing her to enter it back to Equestria.

Twilight Velvet ran up to her daughter, hugging her tightly, as the two were surrounded by her friends. Izuku smiled slightly at the scene, but soon his face switched into more of uncertainty. Celestia could tell he wanted something, but she has no clue what it could be.

"I'm sorry for... taking you." Izuku said, not really sure how to word it.

Twilight Sparkle looked away from Velvet to look at him. She could feel eyes from strangers and her peers on her.

"It's... okay." Twilight said with her own uncertainty. "You didn't do it on purpose." Though Moondancer did glare at him, which is understandable.

He nervously rubbed his arm, feeling the awkwardness of the situation. Still, he looked at the princess, trying to pick up his determination. "Princess Celestia, I'm sorry for taking Twilight."

"It's alright." Celestia said with a nod.

"But..." Izuku take in a deep breath. "Can I ask a favor?"

"Izuku," Her mother said in quiet shock. A couple of ponies murmured while a few glared at the little boy for even daring to do so after all he has done, but Celestia said, "What it it?" She could hear a couple of shock murmurs from her citizens.

"I've always wanted to be a hero ever since I've seen All Might, the Number 1 Hero, the Symbol of Peace in my world." Izuku started as Twilight lifted an ear towards him. "Everyone told me I can't become a hero without a quirk, but then I discovered this is my quirk now." He whinged the end of his shirt nervously. "Can I have your ponies so I can become a hero who can smile even in the face of evil? I promise to make sure I'll get their permission first and return them back home. I'll even make sure they'll be safe too! I... want to be a hero everyone can admire, just like All Might."

He felt selfish and even a little guilty for asking such a daring thing. He could see that these ponies have a life outside of his own, but at the same time, he decided to take the chance. If the princess said no to his request, then he'll have to respect it and attempt to be a hero in another way.

Princess Celestia stared at the young boy with a certain something he couldn't really trace. In her eyes, she could recognize him as an innocent child with a dream, not really as an invader upon her land. "Do you truly promise to protect my ponies with all your might?"

Izuku's eyes seemed to have shined brightly with hope as Twilight stared at him with wonder. "Yes! I'll do everything I could to protect them like the people in my world."

The princess made a small humming sound. "I'll have to ask my ponies first, but with a little convincing, I'm certain I'll be able to give your permission to meet other ponies, though..." Izuku notice she was looking behind him. "Shouldn't you ask your mother about this first?"

Izuku spun around to face her. "Can I, Mom?"

Inko bit her lower lip nervously, trying to choose her words carefully. "If my son protects your... ponies, then they must do the same for him."

"Of course." Celestia nodded.

"Then I'll allow my son to do this." Inko nodded back to her, causing Izuku to have a big grin on his face and run up to her to practically cling onto her. The princess smiled at the scene, but let out a soft cough to gain their attention.

"As for now, I would like for you to simply watch Equestria while I contact to my ponies about this," Izuku nodded, showing that he understands, but the princess continued on, "Though I wouldn't mind if you talk to my faithful student, Twilight Sparkle."

"What?" Twilight said as Velvet hugged her closer. It wasn't out of repulse, but more on the lines of shock for the both of them.

"Lucky..." Lyra murmured.

"Since the two are already acquainted with each other, I believe it would make sense if you two learn from each other."

"I guess we could do that." Twilight said, a little mixed on the situation, but at the same time, she can't really refuse the princess.

"Good." The princess smiled. "Now, if you can excuse us, can you close this portal?"

He poked at the 'side' of the portal, trying to figure out how this works. He scratched his head, thinking how he even activated his quirk in the first place.

Well, I was thinking about Kacchan and his friends, and the portal appeared. If I think about closing it, would it do it? Izuku thought.

He started to concentrate, staring at the portal with a single thought: Close. Close. Close.

The portal swirled around, getting smaller and smaller until it disappeared from his sight.

"I did it!" Izuku happily shouted.

Inko simply stared at him, feeling a little... dumbfounded, if that's even the right world for the entire situation.

Her son's quirk is to create a portal to another dimension where ponies can talk and he can take them out by petting them. She definitely can't recall a quirk like that before in any hero out there, but... Izuku's happy and she hopes it stays that way.

AN: So, to explain this idea... I simply wanted an AU where Izuku can make some friends and get a quirk, so I thought this would be like killing two birds with one stone. At first, I just wanted him to pet them into existence of the MHA world because i thought it would be cute, but I feel like that's a little too random for my taste and also thought that I want him and the rest of Class 1-A to go to Equestria some time in the future, so having him to create a portal to Equestria and having him to pet them in and out of the portal is just another 'killing two birds with one stone' situation for me. I'm still trying to figure a few things out with this fanfic, like if I want to make it humorous or serious or maybe even both. I hope you enjoy this and give me some advice and criticism since this is the first time I'm writing MHA fanfic (I really hope I got Izuku's personality and characterization at least decently correct).