This is set while Kakashi is Hokage, and about season 4 of MHA.
Chapter one
"WHAAAAAA!!!!!" Naruto yelled in surprise as the floor beneath him shifted and changed.
Sasuke gasped in surprise as the same thing happened to him too. Sakura has no time to react as Kakashi and herself were sucked into the void. Nearby, hidden in the trees one could hear an ominous chuckle.
"They May even like that world, but by the time they get back I'll have my revenge."
--
"Oowww," Naruto groaned as he landed rather ungracefully on a tree. Sasuke, Sakura, and Kakashi looked around them, finding a green-haired boy staring in shock.
"Scuze us, it seems we got a little lost." Kakashi chuckled as the child pointed and stuttered.
"B-b-but you ju-just came out of... nowhere!" Team 7 looked around the new surroundings, surprised at the different architecture and setting of their own village.
"Yes. It does appear that way. Naruto, get into sage mode and try to sense what you can. I'll see what I can get out of our new friend here." The green-haired teen was too shocked to care about the slightly threatening tone of Kakashi-sensei.
"Let's see... first off, what is your name young man?"
"Umm... uh... I'm Midorya. Izuku Midorya. But you can call me Deku. Who are you? And what was up with you popping out of the sky??"
"Haha That was rather unsettling wasn't it? I'm Kakashi Hatake, this is Naruto Uzumake, Sasuke Uchiha, and Sakura Haruno. I'm going to be honest, I have no idea why we popped out of the sky, and it seems you don't either. Very well. May you take us to Someone of authority so we may find a way back home?"
Izuku nodded. He didn't know why he was helping these strangers, but didn't seem to sense much evil intentions coming from them.
"Um, sensei?"
"Yes Naruto?"
"Yeah um, why are we following this total stranger, how can we be sure this isn't a genjutsu?"
Kakashi tipped his head, surprised at Naruto's sudden insightful thoughts.
"This is no genjutsu Naruto." Explained Sasuke. "And we are following this child because we have no choice."
Naruto hmphed, retreating to Kurama's headspace to see what the fox knew. Sadly, that ended up being just about nothing.
The five walked for a long time, until they arrived at some type of school. Deku told them to wait and after what seemed like ages a group came out to meet them, intrigued by their interesting story.
"I am principal Nezu. I'm told you are Kakashi, Sakura, Sasuke, and Naruto, correct?" Kakashi nodded. Naruto was surprised when the animal started talking, but surmised it was like a tailed beast or something.
"Im afraid I know nothing of your predicament, and at such times I'm not going to trust you strangers easily. However, the chance your story is true I cannot leave you helpless in a new world. I have a friend who is willing to give you jobs and show you around the city, and I suppose I will allow you to use our training grounds to figure out how to get back. In the meantime, I'm afraid I'm very busy and have to leave."
"Well that was sure quick." Naruto said. "Oh well. At least we get to look around the place, you know?"
One of the teachers led them to Principal Nezu's friend. Sasuke noticed the watchful eyes of the teacher and friend. I don't like this, he thought. If times are truly as bad as that dog says, why would he trust is so easily? Naruto was too excited to care. Principal Nezu's friend appeared to be a ramen shop owner, and Naruto simply couldn't get enough.
--
"Alright nerd, spill it. Who were those people you brought to UA?"
"Why do you care Kaachan? It's not like they're here for you."
"Arghhhh... WHO CARES WHY I CARE JUST ANSWER!"
"Ok ok! They're ninja who say they're from an alternate dimension or something. Principal Nezu is keeping an eye on them to see if they're evil." Bakugo humphed, seemingly satisfied. Kirishima joined Bakugo and Deku.
"You know what, we should fight them and see what their quircks are!"
"Great idea! I'm all fired up let's go."
"Ah no!!! It's past curfew we'll get in trouble. Even more trouble than when you and I broke it Kaachan!"
"Ha you wuss. You're just scared to take them on because you haven't studied them for years." Kirishima laughed, and Deku sighed.
"Alright. Well someone has to make sure you don't get caught going overboard." With that, the three snuck out surprisingly undetected.
--
"Naruto, 3:00."
"Yeah I sense them. I've been sitting still so long safe mode accidentally came on and I felt their presence." Naruto and Sasuke were the last ones awake. Just a few moments before, some fast objects approached the winder of the room they were staying in.
"For some reason, their chakra is different, I can't analyze it as well as in our world. You sense anything with that sage jitsu of yours?"
"I agree it's definitely weird. Well, there's no time like the present. Let's go out and face them instead of sitting here bored."
Sasuke nodded and they both went to the backyard, waiting for their assailants to come out.
"Oh come on, I knew you would give us away Deku, you nerd."
"Hm. Nerd seems to be an insult here." Sasuke noted. Naruto grinned, waiting for a chance to fight.
"Alright you imposters, let's face each other in the training grounds on Friday. I want to see what you supposed 'ninja' are made of!" Naruto groaned, annoyed he couldn't fight yet. Sasuke nodded, accepting the challenge.
"Very well then. However, know that this challenge is to the death, and I will have no mercy."
"Woah Sasuke calm down. We don't need to kill these people just because they're stupid enough to face us!"
"Stupid!? You barely even have a complete body between the two of you the way your arms look." The redhead taunted. Naruto looked sheepishly at his own and Sasuke's nonexistent arms. Though Naruto had one, it was covered in bandages, which must've been why that redhead thought it was badly injured.
"Don't underestimate the Sharingan child."
"Child! I'm not that much younger than you, ok! Oh I'll show you!"
"Alright kimimaru, let's just go." Deku sighed as Bakugo practically dragged Deku away.
"You know Naruto, he kinda reminds me of you when you were younger. Hot-headed, stuck up, stupid..."
"Hey no fair. I was never like that!" Was I really like that? Naruto thought. They both laughed, and retired back to their room, finally able to close their eyes and rest.
