This is a My Hero Academia and Naruto Crossover Fanfiction Only.
Other Franchises will be included.
As the day was done and they were told about the dormitories, some of the people were less stressed when they found out that each would be able to have a room for themselves and that the dorms were in fact divided between male and female dorms, with each room having a bathroom specially designed to accommodate their quirks and physical needs.
Apparently, they took the information about their quirks seriously when considering how to build each room and who to assign them to each room, Iziku's dorm room was actually on the upper floors of the dormitory, which is something Izuku himself asked for.
After his training he took the habit of walking up and down walls to calm down whenever he was nervous, what should be a chakra control exercise became his preferred method of relieving stress. With Bakugo as a classmate, he knew that there was little to no chance at all that his academy life was going to be peaceful.
After he got to his room he quickly jumped up to the ceiling of the room and immediately placed some pieces of paper on the walls and ceiling while using some of his chakras, for a second the walls and ceiling had a design glowing on them but faded back to normal after a minute or two.
The security seals had been placed and the gravity seals were ready for his use, the seal was designed to block any visual or auditory spying into the room, and the gravity seal was designed to increase the force of gravity on the people that were inside the room, but had little to no effect of anything else.
With a simple hand sign, he could control how many times gravity was increased or even decreased. the fact is that no matter what the school would teach him, he would never abandon his training, for no hero should ever be a one-trick pony. Depending solely on his quirk no matter where or from who it came was not a good idea and it bordered on foolishness.
So he did something that Naruto told him to do, whenever he has some free time, spend it in the best way possible, by training, training till he drops, training till he crawls to the bed and feels so much exhaustion that his physical pain is not even noticeable. In other words exactly what he did during his academy days.
He however was smart enough to put a handy detection seal on his door that alerted him when someone was coming to visit him, which should be unnecessary since he is on the boy's side of the dorms, but it was less than an hour before girls wanted to know more about his quirk since they were all impressed with his results in the entrance exam and the physical exam for those girls that were in the same year as him.
Little did he know a couple of the girls were being controlled by a parasitic entity, that was created to be the way to gain a massive army of mind-controlled and brainwashed quirks users, but worse all of them were able to gain and share their quirks in a melting pot of abilities for the sole purpose of creating an unbeatable army. The things that the creator didn't figure out or care about were that their creation was suffering or even how their creation felt or even thinks.
Now she has escaped and taken over the bodies of a few female classmates of Izuku, and from everything she saw in that entrance exam and the physical exam during class, she knew that Izuku had a quirk that was equal to what the number one pro-hero had, which means if she can take him over that she will be so powerful that nobody will be able to capture and contain her, and freedom would finally be more than just a dream for her.
Another reason why she targeted Izuku was that he was also a kid according to her had a perfectly good childhood, happy life growing up, and loving parents, something that she didn't have and she hated him for it, envy and resentment were the initial reasons for her choice, but seeing his powers made her chose him.
Had Izuku barely passed his entrance exams and barely passed his physical exam, the being that villains called Legion would have chosen someone else, say for instance Bakugo or even Todoroki, but that was not the case and thanks to his results Izuku became the only one she needed to pick. That is something however that was odd, here he was, smart, powerful, nice, and not that bad looking, but he had no one that can safely say is his girlfriend, why?
At the time Izuku was doing some exercises by standing on the ceiling and doing calisthenics, push-ups, sit-ups, and crunches when he suddenly got a warning from his seal that someone was coming close to the door to his room, he then heard a knock and Uraraka actually asked if she and a friend could come inside and talk with him about something important. At that moment he did not have reason to suspect his fellow classmates so he jumped down to the floor and after checking he didn't stink too much, he told Uraraka that sure just stand back so the door doesn't hit her.
She stood away from the door and as the door opened he saw her smile and another girl was there with her, as she walked over to him she smiled, "Thank you Izuku I am sure many of our classmates and fellow students are asking questions about your quirk so we figured if we got to ask you all the questions most people would ask and write them up in the school paper, people will stop bothering you."
This for an instant made the hair on the back of his hand stand up, and made him worried about what they would ask him, being trained by two ninjas had taught him about the benefits of information control, "Honestly, I don't see why people are so surprised, it is your basic empowerment quirk, the only reason I can even use it now is that I had some people help me learn a few things otherwise my quirk would not have manifested at all, or using it would cause me a lot of pain."
As they both stepped in and saw that his room was for the most part very modest, as in there were no pictures, and no decorations, the room was exactly the same except for some exercise weights and a mat, other than that the room was furnished with the things the school had provided.
"That is why we need to ask you these questions so that once everyone sees that your results are not due to the power of your quirk people will calm down and you will be able to have a much more peaceful and relaxed time here at our school." As they both sat down he asked them if they wanted something to drink, thinking that this was the perfect opportunity to take him over they actually said yes, they would love to have something to drink while they talk.
The slime that was inside of them left a small mini version of herself inside the two girls while Izuku offered them some lemonade, they didn't even notice that his fridge was under the desk where he obviously would do his reading and class assignments. The minute that he handed a glass to each of them he felt something crawling up his arm, and into his ear. He knew something or someone had invaded his body, to make matters worse the girls placed their glasses on a small table and smiled in an almost mocking way almost as if they had won then Uraraka apologize to Izuku telling him that their friend had to do this and he will enjoy it later she promised.
He immediately closed his eyes and followed the advice he got from Naruto, as he entered his mindscape he saw a young girl no older than he was muttering about not being able to take over his mind. "So you are the one that is controlling Uraraka and Momo, trying to take me over, too bad for you I have very thick mental defenses, thanks to my training, so I need to ask why are you doing this."
She first said I'm not controlling them and "Why? Because I hate the fact that someone who had such an easy and pleasant life has more power than I ever will. I am taking over your body, and nobody will be able to abuse me or hurt me again, not that you would know what that is like, having lived a life that I can call my version of paradise."
That was something she would later wish she had never said to him, "You want to know my secrets, you should know my mind is not the most friendly place to be in, an organized mind can be a terrible place for people to invade, you want to see my memories, sure let me show you the life you envy and tell me if that is paradise."
Abuse, bullying from people around him, being treated as a useless thing, a pathetic piece of garbage all because one doctor said that he had no quirk, as a quirkless his life was a living hell, one of his friends turned on him, and used Izuku as means to show off how powerful he was, teachers ignored the bullying and attacks from Tsubasa since not having a quirk made Izuku less valuable than a slug.
For the next what seemed to be two hours he allowed this invader to see every instance of his childhood, every painful moment, every humiliation, every insult and malicious act done to him, and that is when she came to realize that before his training he probably couldn't use his quirk, without training his body had shut off his quirk as a means to keep himself alive.
The other dark truth is that while she initially envied him for what she thought was a happy-go-lucky childhood, in many respects Izuku was as tormented and hurt as she was, and in some instances even worse than she was. This made her realize that Izuku should have become a villain after all the crap that happened to him but instead, here he was trying to become a hero.
That is when around them seven other people appeared almost like ghosts, he looked at them and smiled, till he met one he knew of, Nana Shimura. "Nice of all of you to come and see me, you must be worried about this slime girl that is currently resting in my head, and is invading my mind, but that is not going to be a problem is it, Tsumomo?"
That is when she actually looked shocked as he mentioned her name, "How did you know my name, I haven't even told you my name Izuku." Izuku simply laughed and told her that she was so concentrated to get into his mind and occupied watching his memories that she didn't realize that someone else was inside her mind, so yes he know what has happened to her, and knows of all the pain and anguish she has been through.
Izuku smiled at her and with something akin to the nice guy pose, he told her, "Tsumomo I know that you are as much of a victim as any one of us, we have all had our lives ruined by All For One at one point or another, he ruined mine when he told my mom I was quirkless when in reality I did have one, but it was stolen by All For One. Every person here had their lives ruined and were killed by All For One, and you Tsumomo are also a victim of his evil deeds."
Nana wanted to know this in greater detail and some of the other vestiges of the previous users of one for all wanted to know as well, Tsumomo decided to use her ability with the help of Izuku's imagination to be able to project her memories on a large screen almost like they were watching a movie at a theater. If any of the vestiges had a complaint it was from one that complained that here he was watching a movie without any popcorn.
Izuku had enough of the complaints and he made a bucket that appear in front of each of them and a cup, he told them to think of whatever they wanted to eat and it will appear in the bucket, and the same with the cups for whatever they wanted to drink. Nana asked him how can he do that, to which he said they are inside his mind, so while inside his mindscape the only limit is his imagination.
Izuku did warn them that they might regret eating while watching those memories, but since they wanted to see what this girl that invaded Izuku's mind went through, he simply sat down and waited for the memories of what Tsumomo had suffered to finish. He and Tsumomo were in fact playing a game of chess while the vestiges watched their "movie".
Two hours later and there were a few of them who weren't crying after seeing what Tsumomo had gone through, some even grabbed the slime girl from her chair and hugged her almost like trying to give her some comfort. "So now that we have established that we are not so different you and I, when are you going to stop controlling Uraraka and Momo?"
Tsumomo looked at her and smiled, "Oh, I am not controlling them at all, in fact, I merely suggested that they should allow me to enter your mind so that I can use my powers to get to know you better and allow them to use your quirk, I can form sort of a hive mind, and if I possess many people, I can share all the quirk of all those people with each other, not to mention I can learn everything they have ever done or thought of doing."
So that gave him a really terrifying idea, if she could have mini versions of herself in key people of the school, they could in fact be able to increase these women's arsenal of quirks they have even if a person has a quirk like their teacher, it would be meaningless since he can only cancel one quirk.
To some, it might be paranoid but to him, it was a firm idea that the old Murphy's law could apply to quirks and people who awaken them, so it was not out of the realm of possibility for a duplicate or another quirk just like the one their teacher has to exist, it simply has not been found or has yet to awaken.
"So you honestly think I can help become a Hero, do you honestly think so Izuku?" Izuku merely laughed as he realized that the vestige of Toshinori was not present which means that he must be embarrassed or he never realized that he could speak and meet with the other vestiges of the previous users of one for all. "Tsumomo, I once thought that I could be a hero while being quirkless, the fact that you can read minds, and even their memories could be a tremendous help in gaining information from people in organized crime, terrorists even kidnappers. So yes, I do believe you have the potential to be a pro-hero. The only thing stopping you is whether or not you choose to be one."
As they were having this discussion a group of teachers rushed towards the dormitory, it seems the director of the school had security cameras installed inside the rooms, which didn't give much in the way of privacy but at least he cared about the wellbeing of his students. As the seal signaled their arrival Izuku exited his mindscape and looked at the teachers who apparently were thinking they need to fight a villain.
As he opened the door Izuku smiled as the three teachers asked if anything was wrong, Izuku smiled and told them to please relax there was not a single person in danger, in fact, he needs to explain some things to the director.
"I see well you should know that normally it is not allowed for female students to stay in a male students room, as such I need to ask the two ladies who apparently came to your room, but that also brings up the question of why were they present?"
Izuku told them that he would be glad to explain when they reach the director's office, as this will save time, Nezu was quite surprised by the turn of events, Izuku and the teachers were coming towards his office, which means he will definitely need more tea. With a few quick movements, he already set everything he needed for the four people that were coming to his office.
Izuku knocked at the door and he was told to enter, "I hear you have something to explain Mr. Midoriya, you must know I saw that slime creature exit one of the girls and crawl up your arm, only for it to enter your ear, we fear that you were possessed by a slime villain or worse. So I asked three of our teachers to check on you and the girls. But you said you had an explanation."
Izuku said that he did so he decided to be crystal clear as to what was really happening to get rid of any concern from them, "The fact is that somehow this person did in fact take refuge inside the body of one of the students, but she did so because other people had captured her, and done terrible things to her, she acted out of pure instinct and panic, she entered my body thinking I would be strong enough to keep her safe."
The director introduced himself as Nezu and he asked how can they be sure he isn't saying this because the slime is using his body to say it, to which he simply said that he knew something probably none except Nezu knew, "You want proof, then I swear what I have said is nothing but the truth on the name of my mentor, Toshinori Yagi. Trust me director Nezu she can be a major asset to our school and society, the only thing she needs right now is to deal with her mental trauma and someone to provide support, and as it turns out I can do both. "
Nezu asked him how can he relate to her? His own quirk is amazing, his results were some of the best the school has ever seen, how can someone like that relate to someone who is so much weaker than he is, and that is when Izuku told Nezu that for some time he was powerless, completely, and utterly at the mercy of other people who abused their quirks. He knows how it feels to be a victim and how to overcome the negative feelings and thoughts that come from it.
"I once had a friend who I thought was amazing, that he could fly in the sky like a bird, Tsubasa is also a person who was really into strength training, I got the bruises to prove it, he said that he wanted to be the number one hero so that he could rake in cash by the truckload and be the richest person alive, but once he heard I was quirkless he began to bully me and use me as his punching bag."
Nezu asked how could this happen without the teachers in his class finding out and stopping the bullying, so Izuku told him that his teachers pretty much ignored his pain or any bullying caused, they even ignored it as they did when his bully told him to climb up to the roof of their school and take a swan dive off the roof and pray that he gets a quirk in his next life.
"So trust me Director Nezu, I know how it feels to be a victim, so if anyone can get this young girl to get over her mental and emotional trauma that would be me, and how do I know Tsumomo is a young girl? Why she is no older than Uraraka, I saw her memories, she became like that after her mutant-type quirk awakened and she has not been able to regain her human form since, and to make matters worse our teacher's quirk doesn't work on mutant-type quirks, so even if Professor Aizawa tried to cancel her quirk it simply wouldn't work, much like the student in my class that has that invisibility quirk."
Izuku decided to mention something, such as the hero costumes and their school uniforms being made from a special cloth, unstable molecules cloth, it would change to match the physical characteristics of the person who wears it, so in case of the person had an invisibility quirk that person can use their quirk without having to remove their clothes, same for Nemuri, with this she doesn't need to expose her skin to use her quirk.
It would be perfect for those whose quirk causes elemental damage such as burning or other forms of damage since the cloth would match the person wearing it. It is very hard to create but by looking at molecules that can change depending on the reaction with other molecules, it should be possible to achieve.
Nezu asked him why bring this up? Izuku said that as long as they are discussing secret things, he might give them an idea to help one of his classmates or several, it would make their lives better, he then asked some of them to have some sympathy for the poor girl, to use her quirk at its very best she literally has to run around naked, which puts her at extreme danger from everything from UV radiation to climate conditions, could cause cancer to other horrible medical conditions, not to mention the sheer embarrassment would make it very hard for her to do her hero work.
Nezu hearing this was amazing that someone would do this for a classmate they only just met, "Since you are telling us this Izuku, I will share a secret that no one but the staff knows, the UA is a place where the future pro-heroes come to train and master their abilities, a school for heroes, but sadly that also draws the attention from villains and I know there is a traitor that is a follower or working for the worst of the villains, all for one. We simply can't tell who that person is. It could be staff, faculty, employees, even a student."
Izuku then told Nezu that is where Tsumomo comes in, she can send multiple copies of herself to everyone and with enough time the traitor will be exposed by their very own thoughts and memories. A simple process of elimination, Izuku will keep her safe. While he meets people at the Academy a small version of Tsumomo will enter the person's head. After say a few months they should know exactly who the traitor is and how that person sends his reports and information to All for one if given enough time Tsumomo could even try to find the location of the hiding place of all for one.
Tsumomo decided to come out of him and she appeared in her slime form as she slid down his arm and came to rest in his open hand, "And this is Tsumomo, care to share with these people what you can do? that is if you want to."
Tsumomo looked at Izuku and decided he was right, she could become a hero and by helping Izuku and those that were close to him, she could even say she had a family that accepts her, something she once believed to be only a dream, she looked at the teachers and Nezu and smiled, "My name is Tsumomo, I can read minds, use telepathy, form a hive mind network with all my hosts, and even improve them with healing and regeneration, as long as a miniature version of myself is inside them, they will have access to the quirks of anyone who also has a mini version of me in them. So say for instance I placed a mini of myself inside recovery girl. Then every person who has a mini of myself in them could in fact use her quirk. Like I said hive mind. And if I do become a pro-hero then my hero name is Carnage."
Nezu decided that this was something he could use to finally find the traitor or traitors within UA and he figured that he could make a group the most targeted group in the entire school to get them to fight against Izuku, and thus give Tsumomo the perfect opportunity to send those miniature copies of herself, without anyone knowing about it. He would ever remodel six rooms into one massive one for Izuku and his harem to call their very own, even if they weren't angry about him getting these girls someone would be furious he has the biggest dorm room.
Tsumomo heard his ideas and began to chuckle as she smiled at Nezu, "Actually I already have seven women who are technically already part of the harem." That is when Nezu began to smile in that way that made all the people that had seen that smile get a shiver down their spines, as he simply said that is a good start Nezu laughed like a deranged maniac.