Okay guys heads up, I know some of you weren't requesting this, but I decided to sleep on it for a while before making up my decision about writing this next crossover story. This is one of many that I thought would be fascinating for most of you guys since no one else is planning to write down a story like this and I noticed that these two shows have a little something in common for having a power that would be "supernatural". A MHA/High Rise Invasion crossover. Now in case if some of you people don't know about the show called "High Rise Invasion" (also known as Tenku Shinpan), it's an Netflix anime show that was written by Tsuina Miura and illustrated by Takahiro Oba in 2013, then until later they released "High Rise Invasion Arrive" in 2019 and lastly the anime show was recently released on Netflix in February 2021. This story follows up a high school girl named Yuri Honjo who was trapped in a high rise realm where countless skyscrapers are connected by suspension bridges and she must also fight for her life and make a run for it from the masks figure people who are mercilessly slaughtering people and to carry out their roles under the mask's commands. I have been doing some research about the masks and supposedly, they grant the user some superpowers. A lot of people in severely social medias have been posting their comments saying that this anime is trashed, lazy work, and boring, but I got attached into watching this horror anime and I enjoyed it a lot honestly. So, I've decided to put my man Deku in high rise to see how things would turn out and how would he handle with the situation against people wearing masks and other people trapped in the strange world. And one more thing, I'm gonna include all of the quirks that Izuku has so far in the series because OMG, I was reading the latest chapter of MHA and my mind was BLOWN away by Izuku's new inherent quirk that he has unlocked when he saved Shindo from Muscular. I was going nuts and I couldn't stop thinking about for over the past 5 days or so. The Izuku I'm including is the arc of The Final Act just so you guys can know.

With all that being say, enjoy the story!

Disclaimer: I don't own either of these series! They belonged respectfully to their owners.

My Hero Academia is owned by Kohei Horikoshi

High Rise Invasion is owned by Tsuina Miura

It was a rough day in U.A High and Izuku Midoriya (AKA Deku), the hero prodigy was a hard-working student who is focusing on his goals, admiring pro heroes, training to master his quirk and to become the greatest hero in the world. The world that Izuku was born in was a superhuman society, with more than 80% precent of the population possessing superhuman abilities known as quirks. Unfortunately for Izuku, he was born quirkless, but everything change when he met his idol and the Symbol of Peace himself All Might. After seeing the plain boy's actions and heroism, he accepted the young lad and took him under his wing by passing his quirk onto Izuku. The name of his power was One For All. A ultra powerful quirk that was passed down from hero to hero, bringing peace and hope to the world and Izuku was the next bearer of the quirk and the last. Supposedly, he was last user of One For All and the society's last hope to defeat All For One.

Izuku was in his hero gamma costume looking out at the window thinking about his quirk, his optimism, and for the people living in the city and he immediately shuts his eyes.

"I wish that one day, I will become the greatest hero and keep everyone safe. That's a promise I intend to keep, not just for everyone, but for All Might too and the previous wielders of One For All." Izuku thought with such determination in his mind

Unbeknownst to Izuku, the place around him are starting to act like they're transporting him somewhere else in another place.

He gave a deep breath and slowly opened his eyes looking to see a different, but bigger and wider view.

"Huh?" Izuku squinted, peering in a distance. Shocked and his eyes widened, he was no longer inside his house. He was somehow transported on the rooftop building where it was surrounded by a bunch of skyscrapers and the building he was standing on has some fences around the edges too.

"What's going on? Is this a dream?" Izuku asked himself, rubbing his eyes trying to dispel that this might be an illusion or he could be hallucinating. Both of the answers was neither. The image he saw in his eyes was pure reality. The tallest tower was sharpened, crystal clear through the glass. It was surrounded by skyscrapers as well, smaller though but still looming like giants. Some other skyscrapers were also connected with rope bridges.

"No, this isn't a dream at all. Where in the world am I? I was literally at home a minute ago, in my room looking out the window. And then all of sudden, I got transported to somewhere else. Could this be the cause of a villain's quirk or is it something else? I should tried calling out someone in my contacts to see if I can reach out to them and let them know that I'm transported to another world." Izuku thought, taking out his phone to call one of his friends. He first tried calling All Might, but he couldn't reach out to his predecessor. He then tried calling his mom, Bakugo, Iida, Uraraka, Yaoyorozu and Todoroki, but none of them haven't answer him.

"Crap, it looks like I can't get their signal while I'm transported at another city. I'm not even sure of what city is, but I should tried and focus on finding my way outta of this place and return back to where I came from." Izuku said with a determined look.

"No! Help!" A voice of a woman was yelling out for help, which caught Izuku's attention as he turn his head around to see a woman from a upper skyscraper building.

"Someone's in trouble!" Izuku exclaimed, peering at the distance to see a woman running away from something or someone.

"No! Get away from me! What do you want?! Just leave me alone!" The woman shuddered keeping her distance away from a smiley mask person, who is armed with a weapon.

"Who is that? Some kind of psycho maniac? And why is that area opened?" Izuku sputtered with confusion

His question was answered when the woman then had no other choice, but to do what mask person is forcing her to do and there by falling into despair and commit suicide. She looked all the way down laughing as she was about to accept her own fate which Izuku gasped and his eyes widened, knowing of what's about to come next.

"DON'T DO IT!" Izuku was yelling out to the woman, but it was too late. She jumped off the building with her head straight all the way down on the ground as her head blown out and blood was splattered around the spot she landed on. Izuku gasped with horror looking down on the woman's gruesome corpse. He failed yet again to save another person. The smiley mask person started walking away to find his next target.

"No... there's no way something like this should be happening, not here not now. Just... what kind of sick twisted person would do something like that? To force the innocent people into committing suicide... It's so unforgivable. I can't even imagine of that mask villain being so cruel." Izuku cursed that wretched mask person tightening his fists.

"I won't let him get away with this. Now I have to get to the bottom of this and find that mask villain." He then noticed the tall tower. "That tower that stands above all the other skyscrapers. Maybe that's where I'm supposed to be heading to and find some answers. But first, I have to make across the main building, one that is connected with 3 rope bridges. But still though, it's kinda strange for somebody to be constructing a rope bridge that leads to another building." Izuku stated his next plan of action. As soon he was about to make his way over, he felt a sharp stabbing sensation in his head, meaning he sensed an enemy approaching him and attack him, but he quickly avoided the attack by jumping backwards. He turn to see another person with the same mask he recognized a minute ago and he was armed with a hammer.

"It's another psycho maniac with a mask and he armed with a hammer. Is he somehow working with that other maniac I saw a minute ago?" Izuku thought with a good question. A mask hammer wielder points his hammer towards Izuku.

"Stop! Why are you doing this? Just what are you guys trying to accomplish?!" Izuku asked him, demanding for answers.

The mask hammer wielder didn't reply to Izuku. He charged at him by swinging his hammer vertically, but Izuku easily dodged it and counterattack by kicking him hard in the stomach sending him sliding on the ground.

"Answer me! What are your true intentions? Are you doing this under someone else's benefits?!" Izuku asked

The hammer wielding mask still didn't reply to Izuku as he slowly got back up on his feet. It looks though that he was getting all warmed up and ready for the beat down. He cracked his neck and his arms. He was charging faster than Izuku anticipated and swinging faster than before. Izuku was moving and jumping back avoiding every attacks the mask throws at him.

"He is a bit faster than before. Was he holding back just to test my abilities? Even so, he's hasn't answered any questions that I asked him. It has something do with that mask that's preventing him from talking. If I break it, maybe that will get him to snap out of it." Izuku thought and backed up a few feets away from him. He readied his attack, waiting for the moment to attack. The mask charged at Izuku, swinging his hammer, but he suddenly missed as Izuku reappear before him by giving him a full speeding kick to the face.

"SMASSSSH!" Izuku roared kicking the mask man, shattering the mask and he fell over the floor, groaning. Izuku quickly undid his Full Cowling back to his normal state.

"Hey mister, are you okay?" Izuku asked, ran over to lend the man a helping hand. The man stood up and starting stepping back away from Izuku.

"Stay back! Don't come closer to me, or I'll end up killing you!" The man yelled, panting heavily.

"What?" Izuku asked with confusion.

"The truth is... I'm being control by the mask right now and I have to do whatever the commands is telling me to do. The mask is linked into my brain and I can't break out of it." The man explained the facts about the mask.

"The commands?" Izuku asked

"You're not supposed to look at the back of the mask. If you do, it will take full control over you. Because of that, it's an electronic device that nobody is able to resist." The man added more info, placing his hands on the edge rail of the building.

"You must now end your life." The mask ordered the man as it was his last commands.

"Please wait, I can help you by breaking free from the mask. You don't have to do this." Izuku said, volunteering to help the poor man.

"I'm sorry, but I'm afraid I can't do that. I have to obey the mask's final commands." The man rejects Izuku's aid.

"Stop! There's no reason for you to commit suicide... I know we can work this out somehow. I swear it!" Izuku exclaimed, walking towards him

"STOP RIGHT THERE!" The man yelled at Izuku, stopping him from making another footstep closer to him.

"Listen to me well kid... you cannot save of what I am now, even if you destroy the mask permanently, the mask's powers are above than beyond and it's impossible to free me from such extend. You need to save the citizens who are also pulled in this world. Please... I know that deep down in your heart... you can save them all... It's all up to you now..." The man said his last words, shedding tears with a smile and took off at the edge of the building.

"NO!" Izuku yelled with all his might trying to reach out to him, but he was too late as the man fell straight down to the ground with his head landing on contact. Izuku was looking down at the man's gruesome corpse, horrified. He dropped down on his knees of what he saw in his own eyes and experienced the situation.

"No way... these guys aren't really villains nor they're monsters. The masks is what's controlling them and driving them into doing someone's dirty work by killing citizens who are also trapped in this world. Guess I was right about breaking the mask and because of that, I was able to communicate with him, but in the end, he was to obey the mask's last command by committing suicide and I couldn't save him." Izuku moaned about his actions, slamming his fists on the floor frustrated. He took a moment to control himself and got back on his feet.

"There's still a lot of things going on in this world that I need to uncover. The people who are wearing the masks, they're not our real enemies. The one who is pulling the strings here and commanding the masks, they're our real enemy. That person of course is the mastermind who's responsible for pulling me and the other people in this world, so I just gonna fight my way through and find the mastermind who's controlling the masks! Not only that, I'll also save the citizens who also got dragged in here as well. I'll do whatever I can to survive no matter the cost!" Izuku thought determinedly

Izuku started making his head way by taking the rope bridge which leads inside the building. As soon he was about to head in the building, Izuku stopped for a moment when he spotted a bag lying on the floor.

"A bag?" He took a look inside and found some food and water. He looked around to see if this was somebody else's property and that he didn't want to take anything from the bag without knowing, but apparently there was no one around who owns the bag. He was feeling a bit hungry though and sat down on the floor to have a little break.

"It was pack with load of supplies in there. A provision perhaps? Even so, that fight I had with the mask, his physical abilities were quite impressive even though he was being possessed by the mask. His movements earlier wasn't normal at first and he almost had the jump on me, therefore, it's most likely that the mask he dawned granted him some supernatural abilities or maybe a quirk. I actually feel bad for killing those masks, but what choice do I have other than killing them? I'll have to take them down the moment that I see them." Izuku thought, now done with his little snack. He took the bag of supplies with him and starting walking across the rope bridge.

"It's like I said before, that building has three rope bridges connected to it and that's where they lead. I wouldn't doubt it that there's probably gonna be some masks on the way too. I was able to defeat the hammer mask earlier, so it won't be much of a problem." Izuku thought to keep in mind about the bridges.

"I've got this." Izuku said as he carefully walk across the rope bridge and placed both of his hands onto the rails. Before he took a step inside the building, he heard a noise and look up to see a helicopter passing by. The helicopter was flying at another direction instead of taking the direction of where Izuku was at.

"I get the feeling that those masks are the ones flying the helicopter. " Izuku thought and went inside the building. When he took a step inside the building, he witness a dead body of a man.

"AHHH!" Izuku yelped by the sight of gruesome corpse. He investigated the dead body searching for any evidence.

"This person was critically injured on the head. I wonder if I could find any information regarding this world I was pulled in." Izuku thought, looking carefully at the dead body and noticed a paper and took it out.

"Let's see here, a regular helicopter service. We regularly did some operation to develop a exit helicopter. To exit this world and leave the ground, please take the helicopter. However, the maximum capacity is only one person." Izuku read the paper.

"Just one person? Unbelievable. If I were to escape from this world, then everyone here would be left behind. Maybe it could some sort of trap or something? I don't know for sure yet. I still need to gather more information about this world. Whatever awaits me, I'm bound to find something interesting." Izuku thought determinedly, sighed for a brief moment until he heard some footsteps in the hallway. He quickly hide in the corner concealing his presence.

"Someone's here inside the building... another mask or it is someone else?" Izuku thought cautiously.

"Alright, whoever you are hiding behind the wall, come on out right now and show yourself!" A voice of a girl exclaimed, as Izuku realize that he was caught by a girl listening out to him. He slowly walk out of the corner wall to see a high school girl holding a gun and aiming it at Izuku.

"Please wait! I mean you no harm. I'm only a friend okay. I'm not your enemy nor I'm one of the masks." Izuku stated, as the girl was stunned, shaking to see that Izuku was not one of the masks.

"I...I...I'm so sorry! I didn't really mean to... I thought you were one of the masks." The girl apologized to Izuku, crying a bit.

"Hey, it's okay! You don't need to apologize. I thought the same thing, but I've figured that I might run into some normal citizens in this strange world. " Izuku said

"Wait, you got dragged in this world too?" The girl asked

"Yeah, I'm not sure what brought us here, but one thing that I do know for certain is that someone is responsible for transporting us here and pulling the strings. That's why I decide to gather information about this world and find the mastermind who's controlling the masks." Izuku stated

"Yeah, same here." The girl said, agreeing that Izuku wasn't the only one.

"Oh that reminds me, I was thinking that you and I should work together to find the mastermind." Izuku reassured

"Does that mean you're willing to cooperate with me?" The girl asked, feeling assured

"Absolutely! I'm more than happy to be there for to lend a helping hand. Besides, there's no way that I can let someone like you handle this on your own, so it's better to work together to fight our way through and escape from this world." Izuku exclaimed with a smile, which made the girl feel safer now that's she with him.

"Thank you so much! I promised you that I won't let you down!" The girl exclaimed, bowing her head and feeling motivated. She's finally found someone that she could trust and to have faith on.

"My name is Izuku Midoriya and you are?" Izuku said

"I'm Yuri Honjo, it's a pleasure to be working with you Izuku." Yuri replied

They heard some gunshots and someone screaming in pain.

"Wait a minute, help me!" A civilian man screaming for help.

"Someone's else is here." Izuku said

"Maybe another mask." Yuri claimed as they walk steadily and peek at the corner wall to see something unexpected, which shocked both Izuku and Yuri.

"It's another girl and she's not a mask!" Izuku thought

To be continued...

Annnnnnnnnnd that's a prologue for A Hero in the High Rise Realm. It took a while for me to make this and I hope you guys like the prologue. Now in case you guys haven't noticed, let just say that I'm autistic. No really, I was born with this disability and I've been struggling with it for my whole life. People in the comments are saying that I'm not writing correctly, but this is the best writing that I could do, so please don't hate for this. Also, I haven't uploaded a chapter for Deku in Danganronpa for quite a while, but I'll get it done by then.

Anyways, I'll see you guys in the next chapter.

Peace!

Next chapter: Meeting Mayuko Nise