AN: Hello, here with a new chapter. I'm sure you can imagine what will happen in this chapter, but I'd like to let you know that there will be a special appearance. Who? You'll have to read it to find out.
A whole day had passed since the students received the news that they could return to their world. A couple of them were a bit disappointed, as they would have liked to learn more about that world, go on hero quests, and most of all, meet many more heroes. Perhaps, with a bit of luck, their world and this one could strike up some relationship that would allow them to be able to return.
At this moment, the students were aboard the Quinjet along with the Avengers heading towards the location of the device that would take them back to their world.
Among the students, Mei was carrying a couple of suspicious suitcases. Believing them to be souvenirs from that world, they decided not to ask.
Soon after, the Quinjet landed in front of the building, letting its passengers off.
"So, here's the device that will take us back to our world?" asked Momo.
"Yes. At first we used it for certain special cases, but as soon as I told my friend about yours, he made some adjustments to it so it could take you to your world." said Iron Man.
"I'm curious, who is this friend of yours?" asked Kyoka.
At that moment, they noticed the doors of the building open.
"You have him in front of you." said Iron Man.
The students looked straight ahead to see four people come out of the building but were dumbfounded to discover who they were.
They were a man with black hair, a blonde woman, a blonde man, and a man who appeared to be made of rocks. All four were wearing some sort of blue suit with a number 4 symbol on it, except for the rock man, who was wearing a pair of pants, although the symbol was on a rock on his chest.
"Tony." said the black-haired man.
"Reed." said Tony before the two men held hands to greet each other. "How are things?"
"They're going well. Anytime you want, you're free to go." the black-haired man said.
"And I guess those kids are the visitors you told us about." said the blond man looking at the students who were still in shock.
"T-They are..." began Denki.
"They're the Fantastic Four! A group of heroes that, despite being four members, is very powerful!" exclaimed Izuku excited to meet another group of heroes from that world.
"I see you have informed yourself. It's nice to meet you. I'm Sue Storm, known as the Invisible Woman." said the Invisible Woman before pointing her arm at the black-haired man. "This is my husband, Reed Richards, known as Mr. Fantastic."
"You know? A classmate of ours has the power to be invisible." said Ochaco.
"But unlike you she is invisible all the time." said Mina.
"Really?" asked the Invisible Woman.
"Yes. In fact, his hero costume is only gloves and boots." said Tsuyu, leaving the adults dumbfounded.
"O-Only that?" said the blond man in shock before receiving a blow to the back of the head from the rock man.
"Stop imagining that! You'll look like a pervert!" said the rock man.
"Hey! Try that after you know there's a girl going around with just that." said the blond man.
"It's official. When possible, I'd like to meet her, I don't plan on letting her go around naked." said the Invisible Woman crossing her arms.
"I'm sure she'd love to meet you." said Momo.
"Well, back to introductions. I'm Johnny Storm. Everyone knows me as the Human Torch." said the Human Torch.
"And I'm Ben, also known as the Thing." said the Thing.
"Jo, dude. I'm a fan of yours. You look so manly in action. I especially love your line, 'It's clobberin' time'." said Eijiro excited to meet you someone who has similar power to his.
"Ha. That's my phrase, don't steal it." said the Thing.
"So, you helped find a way for us to get back to our world?" asked Kyoka.
"That's right. As soon as Tony told me about your problem, I didn't hesitate to help you." said Mr. Fantastic.
"We weren't going to allow children like you to be away from your home and families. Surely they will be worried about you." said Invisible Woman.
"And they will be more than happy to see you again." said Thor.
"It has been very educational and fun to be on this world. We will never forget the hospitality you extended to us. No matter how long it takes." said Tenya bowing in thanks.
"I had a great time. It was great to meet all those heroes and learn from them. Thank you so much for giving us the chance to see all those things." said Izuku bowing as well.
"I'm glad you enjoyed your stay in our world." said Captain America.
"I can't wait to tell everyone what we've been through!" said Ochaco excitedly.
"I can already imagine their surprised faces when they hear that. Hehehe." said Mina with a little laugh.
"They'll see when we tell them that we fought real villains in real missions. They'll die of envy." said Katsuki.
"I'm afraid it's not going to be a happy reunion at all. Don't forget that Hydra plans to attack your city." said Iron Man.
"That's why we'll go with you." began Mr. Fantastic gesturing to him and his group. "We will help you defend your world."
"You're coming with us?" asked Shoto.
"Why sure. When does one ever get the chance to go to another world where almost everyone has powers?" asked Johnny.
"Besides, we could use all the help we can get for this invasion. Not just from the heroes of your world." said Falcon.
"That's why we're here." said a male voice very familiar to everyone.
They turned and saw the second squad of the Avengers, Shuri, Professor Xavier, the X-Men, the young mutants, the royal family of inhumans, Doreen, Daisy, Spider-Man and Spider-Gwen appear around the place.
"Guys! What are you all doing here?" asked Izuku.
"What do you think? We're coming with you." said Kamala.
"Were you really planning on leaving without saying goodbye?" asked Rogue.
"You have done so much for our world and for us." said Professor Xavier.
"So it's time for us to return the favor by helping you protect your world." said Medusa on behalf of her husband.
"Besides, I'm very curious to see how your world is after everything you've told us." said Spider-Man.
"But if you all go to our world, who will protect yours?" asked Eijiro.
"There are many more heroes than you can imagine, they will be able to take care of the problems in our absence" said Doreen.
"Not to mention that S.H.I.E.L.D. gives us their full approval." said Daisy.
"Are you coming too Shuri?" asked Mei excited for her new friend to come with her to her world.
"Well, yes. Our technology is very advanced, but I'm very interested to see what kind of technology you have." said Shuri.
"You'll love it! You'll see!" said Mei.
"I hope you don't have any problems." said Wolverine to the Avengers.
"Not at all. The more the merrier." said Iron Man.
"All right. If we're all ready to go, let's get going." said Mr. Fantastic leading the whole group inside the building where they could see a huge ring-shaped machine placed on a podium near some stairs.
"Is that the machine that will take us back to our world?" asked Tsuyu.
"That's right. As I'm sure you've been told, we usually use this to send the most dangerous villains to a place they'll never escape from. When Tony told me about your problem, I had to make a few adjustments so that I could get you back to your world." said Mr. Fantastic entering a couple of commands into the machine.
"And now that it's all set up, we can go there right away." said Invisible Woman.
"Before we go through, you should take this." said Thor handing them all a vial with a certain liquid in it. "For all we know, we will be going to a place where they will speak Japanese, so, if you drink that, it will help you understand the language perfectly and vice versa."
Without questioning the thunder god, everyone drank the liquid. Fortunately, none suffered any effects from it.
After entering the last commands, Mr. Fantastic pressed a button, causing a large vortex to form in the metal ring.
"Right. Here we go." said Captain America being the first to move forward, followed by the other heroes, young heroes and students.
Each of them went through the vortex and when the last of them crossed it, it closed.
In the other world, in the middle of somewhere, a vortex suddenly appeared and out of it came all the heroes, young heroes and students.
"So, are we there yet?" asked Kurt.
The students looked around and smiled broadly when they saw where they were.
"Yes! We're in the U.A.!" exclaimed Ochaco with great joy.
"We're finally back in our world!" shouted Denki raising his arms upward.
"So this is your world. It doesn't look so different from ours." said Laura.
"Hold it right there!" demanded a male voice.
Everyone turned to see a man dressed in black with a scarf and eyes that signaled he hadn't slept in days. While the otherworldly visitors were confused by the newcomer, the students were glad to see a familiar face.
"AIZAWA-SENSEI!" the students shouted before rushing towards him.
Even Izuku and Ochaco hugged him, much to the teacher's surprise.
"We missed you so much!" said Izuku.
"But what... Izuku?! Ochaco?! All of you?! Can you tell where you've been all this time?" asked Shouta surprised and glad to see his students, though the latter didn't show it.
"We can explain that." said Iron Man as he and the other visitors approached him.
"Who are you?" asked Shouta cautiously.
"We'd better go somewhere else. We have a lot to talk about." said Captain America.
Meanwhile, back in the Marvel world, at the Hydra base, the situation was progressing very quickly.
Arnim Zola, along with several Hydra scientists, was making final adjustments to the portal device to generate a vortex large and stable enough to carry an entire army to the other side.
"How's it coming, Zola?" asked Red Skull approaching the site.
"By my calculations, it should be up and running in a couple of hours." said Arnim Zola.
"You better hope everything goes perfect. We don't want any glitches before the attack, do we?" asked Red Skull threatening between the lines that he would pay for it if anything happened.
"Understood." said Arnim Zola understanding the Hydra leader's threat before returning to work.
At that moment, Doctor Doom approached the one orchestrating the entire attack.
"The troops are ready for the assault" said Doctor Doom.
"And your Doom-Bots?" asked Red Skull.
"Over 100,000 units ready to attack as soon as I give the order. Remember, we are partners, but I don't care what you do to that world, I just want my end of the bargain." said Dr. Doom.
"As you wish. You can take all the 'souvenirs' you want from that world. Just try not to get in the way of my plans." said Red Skull.
"Same to you." said Dr. Doom before walking away.
Red Skull stood there contemplating the machine that would take him and his army to a world he would conquer and once he succeeded, he would return to his original world to conquer it with the help of the allies he formed on that world. Hydra wouldn't only conquer one world, but TWO and neither the Avengers nor any other hero would stand in their way.
In a few hours, the war would begin.