First day of school

Izuku and Katsuki were standing in front of UA. It was the first day and the two teens had decided to walk to school together, and to talk about what their future was to look like and thinking about the kind of people that would be in their class. After standing in front of the school for a few minutes, the two walked into the school.

After walking for a couple of minutes they came to a door with 1-a on the door. " thats a massive fucking door. Who the hell do they have coming to this school." said katsuki looking up at the door.

" Well don't forget kachan that all might is like 7 feet tall." said izuku walking to the door to open it. As he opened the door he was met with a class full of people, but he was happy to see some familiar faces. But that of itsuka and camie.

Before greeting them, Izuku smelled someone coming behind him, and heard their footsteps. "IZUKU!" said a very familiar voice to izuku. Turning around and catching pony who jumped to him, giving her a big hug and a wide smile.

Katsuki just smirked at his brother and looked at the others in the room and saw itsuka and camie looking at izuku and pony with envy, while the rest of the class looked with different looks ranging from curiosity to angry jealousy. Mainly from a small purple haired grape head boy.

As izuku was hugging pony he could smell someone else coming up behind him, and when he looked he saw the brown haired girl he and the girls saved. " Hello, I see you made it in as well. Is your leg better?" asked izuku setting pony down.

"Yes , thank you again for saving me. I am glad to see you also made it in." said ochaco.

"No problem." said izuku. Izuku stopped for a second and turned to look at the ground, seeing a large yellow caterpillar. But to his and everyone else's surprise the caterpillar turned into a man with baggy black hair and eye bags. 'Is this a teacher. He looks like a hobo.' thought katsuki.

"Hurry up, get in your seats. Heroes don't have time to wait and hangout. It already took you 20 seconds to get quiet, you need to do better." said the man.

After everyone was in the results the man spoke. " Alright to start, I am your new home room teacher, the names shota aizawa. You will call me aizawa Sensei or mr. aizawa, good. Good. Now it's time for the real part of today." said Aizawa, reaching for his sleeping bag and pulling out PE uniforms and throwing them at the students. Some caught their uniforms like katsuki, izuku and itsuka. Some didn't catch them like a kid with yellow and black hair, and a the purple haired grape kid who was too busy looking at pony.

"Now put those on and meet me outside, you have 10 minutes starting now," said aizawa walking out of the room. Everyone left in the room went and changed into their gear. Once everyone had their uniforms on they made their way to the field.

"Hmm, 9 minutes flat, you're learning. But now that you are all here, time for the test." said aizawa.

"Wait won't we miss the orientation, and what test are you talking about?" asked ochaco. With multiple others wondering the same thing.

"Here at UA, us teachers can do what we like when it comes to teaching. You have three years to become the best heroes you can be and we can't be wasting time. So i am conducting a quirk apprehension test, just like in school just this time you can use your quirk. It is counter productive to not use your quirk, it's a part of you so therefore we need to test and strengthen it." said aizawa, pulling a phone- like device and a ball with a weird design out of his pocket.

"Midoriya, what was the best throw you did in high school?" asked aizawa throw the ball at Izuku.

" I would say about 30 meters (about 100 ft) sir." said izuku, with some people looking at him a little weird.

"Good. now do it with your quirk." said aizawa. ' his quirk must give him a passive strength increase. 30 meters is impressive, the average is about 20 meters.' thought aizawa watching izuku walk to the area to throw.

As izuku approached the circle to throw, he was thinking of the animals to use and how much he wanted to show off. Once he reached the circle he looked back and overheard something.

" Hey, good looking, names Denki Kaminari. What's yours?" asked danki to pony.

"Pony but I have a boyfriend already." said pony leaning away from danki.

"Come on, we are both in the same class and where is he at?" asked danki.

Izuku, hearing this, had one thought. 'All out power.'

Izuku readied himself. Increasing his strength to the max with the strongest creature on earth, the dung beetle being able to lift 1,141 times its body weight. He then changed his arm to that of a pistol shrimp for the snap reaction to give the ball a fast throw and momentum. Finally izuku did something special, he changed and made a new organ in his hand similar to that of the bombardier beetle and filled the organ with a synthesized mix of air and hydrogen, adding a small hole or vent to the palm of his hand izuku was ready.

Izuku pulled his arm back and with all the force he had through the ball with a massive explosion behind it shocking everyone. With a mix of strength, snapping speed, and combustion of the air and hydrogen made the ball move at blistering speeds and far out of sight.

Everyone was dumbfounded at what they saw, izuku just made the ball vanish and caused an explosion. Camie and itsuka were gobsmacked at his power, pony was smiling with joy, others were scared or shell shocked, but Katsuki was a mix of emotions. On one hand he was impressed with his brother's throw, on the other he was speechless because izuku just caused an explosion just like his quirk.

After getting over his surprise, Aizawa looked at the device in his hand and told the class. " Now you see what the difference in using your quirk can do, now is the time for everyone to test out." said aizawa showing everyone izuku's score of 1000 meters (about 3280 feet).

After getting past the shock of what they saw, and the score he got, some People got excited. " Now this looks like it will be fun," said a pink skinned girl.

"Fun you say. How about this for fun, whoever gets the lowest score is expelled, and before any of you ask I can expel anyone anytime i want. Now do your best and show me why you are here." said aizawa with a crazy grin on his face, scaring the class.

Pony looked over at Denki next to her and smiled. " That's my boyfriend." after saying that she walked over to izuku who walked out of the dust cloud he made and she blushed. Izuku, not knowing why, felt a breeze. Looking down he saw that the whole right side of his pe shirt was gone showing off his lean muscular body and half of his well defined six pack.

After seeing his state he asked aizawa for a new pe top but he didn't have one, luck for him a tall black haired girl walked over to him and handed him another pe shirt. " Thank you, where did you get it from tho?" asked izuku.

"You're welcome, and I made it with my quirk." said the black haired girl.

" Wait with your quirk? What is your quirk?" asked izuku with stars in his eyes, as he was excited to hear about a new quirk.

The girl backed up with her hands up in a halting position and a blush on her face. " Um, could you please put the shirt on first?" asked the girl, with a blush on her face looking away from izuku, while also stealing a couple glances at his body.

Izuku backed up and apologized and took off his old pe shirt. With his shirt off everyone could see his exposed upper body in all its glory. Some of the guys were jealous of his body, the same girls were blushing like the black haired girl, itsuka and pony. Some girls were staring and starting to drool, like the pink skinned girl, and camie.

Once he put his shirt on he looked back at the black haired girl. " thank you again, and sorry for getting up in your personal space. Let me introduce myself. I am izuku midroya." said izuku.

The black haired girl recomposed herself. " your welcome and my name is momo Yaoyorozu." said momo, with a small bow

After talking to each other for a couple minutes and for mr. aizawa to get a new ball everyone went back to doing the tests. Starting with the 50 meter dash, as the people kept going, Izuku was planning his next move to get the top score, trying to beat the blue haired guy from the entrance exam who got 3.04 seconds on his attempt.

Once it was his turn he went up and got in position next to Katsuki and they looked at each other silently and made a bet to each other. They both got ready and izuku changed his muscles in his legs to that of the Californian mite to increase his speed.

Once the countdown finished, Katsuki blasted off and landed, getting a time of 4.13 seconds. But Katsuki was frozen in shock along with everyone else including aizawa. For in the area izuku was in was a dust cloud and izuku ending up about 500 meters away from the end of the 50 meter line. After izuku got back he asked what his time was and mr. aizawa with his jaw basically on the floor had the robot replay his time. Izuku had a time of 0.09 seconds.

Katsuki walked over to izuku and grabbed his shoulders, and proceeded to shake him violently asking him questions. " how the fuck did you do that? What fucking animal on earth can run that fast? Like what the hell man." yelled katsuki.

Izuku for his part tried his best to get out of katsukis grasp and eventually did. " kachan you know, if you would stop shaking me, I would answer your question." said izuku dusting himself off.

"Actually could you explain it and your quirk to me as well. Your file had some detailed notes about your quirk but I want it from the source." said aizawa with the rest of the class listening.

"Yes sir. My quirk is called animal kingdom and it lets me transform my whole body or parts of my body to that of any creature that has or is walking this earth. In detail I can control each cell of my body to do what I want and to turn into whatever I want. The down side being i can only have three changes at one time unless i want to feel pain throughout my whole body, and the more changes i do the more stamina it takes. The final part of my quirk is that when not used I still have a passive effect, mainly increased strength, speed, and senses, with a small increase in healing rate." explained izuku.

Aizawa and the rest of the class including camie, and itsuka who didn't know his quirks fully were silent. Until aizawa spoke. " I see, so you have the whole animal kingdom in your corner helping you. Interesting." said aizawa will also think to himself. 'It looks like I have definitely found my problem child, and a future top pro hero.'

The rest of the class surrounded izuku asking him questions about his quirk, and what he can turn into. Until aizawa used his quirk to scare the students silent except izuku who was not affected by the killing intent coming from him.

Back to the test they went on as you would think. After the dash was the grip strength test and izuku got the best score mixing beetle strength and having 6 arms like another student. After that was the standing long jump where izuku went first but asked his teacher if flying would count where aizawa said it would count, but he wanted to see him jump as well. Izuku listened and jumped with a mix of locus legs and kangaroo muscles, easily clearing the sand pit and going quite the distance. Next was the side to side jumps and izuku was surprised to see the grape head kid do pretty good in the test, being the only one to beat izuku in the test. Next was the ball throw but izuku didn't have to do it, but was impressed with katsuki and his throw, along with a blond haired girl who throw the ball a little short of katsuki, but the ones that got him where ochaco who sent the ball into orbit getting infinity, and momo who made a cannon and got a score of 1.2 kilometers. The next test was the distance run where it was called a tie when izuku and momo went for about 10 miles of distance with neither of them looking like they would stop, given that momo was on a scooter and izuku was running with raptor-like legs. They were keeping up with one another and even started a conversation will running. The last two tests were the seated toe touch and the sit ups and izuku won both with making his spine like a snake and basically being the most flexible person there, but the pink skinned girl, camie, and itsuka were the most normally flexible people.

Once everyone was done the scores were shown by aizawa using a holographic screen, showing the scores as.

Izuku midoriya

Momo yaoyorozu

Shoto todoroki

Katsuki bakugou

Tenya iida

Melissa shield

Fumikage tokoyami

Mezo shoji

Eijiro Kirishima

Itsuka kendo

Mina ashido

Pony tsunotori

Ochako uraraka

Koji koda

Tsuyu asui

Camie utsushimi

Hanta sero

Danki kaminari

Hitoshi shinso

Kyoka jiro

Minoru mineta

Everyone was looking at the scores they got, some were relieved and some happy with their placing, but one was a different story. Izuku looked over at the purple haired grape kid who was in the fetal position crying. Izuku could hear the kid saying something about being unfair, and how now he cant have his harem. As he was listening, Aizawa was talking and looked at the grape kid.

"Mineta you have shown all you can do, get your stuff and leave. You are expelled." said aizawa looking at mineta.

Once the grape head heard those words he lost it. Thinking that if this is the end of his hero courier, he would go out touching at least one woman's breasts. He quickly looked for the closest female and found pony standing and talking to camie and itsuka. Mineta in a fit of craziness jumped at pony and said something about wanting to "touch them tits".

Aizawa saw this and was about to stop him when out of nowhere mineta was hit out of the air by something. He was on the ground and was about to try again when he was stopped by a wall of fire. Aizawa looking at the source saw izuku spitting fire from his mouth. Once his fire was done, Mineta looked up to see red. He saw red eyes and a shadowy figure looming over him, with a massive aura of killing intent pushing down on him, with a sharp toothed maw with smoke coming out the sides staring at him.

Everyone around izuku including aizawa could feel his killing intent, most of the class was frozen even aizawa was frozen for a second, but before he could tell izuku to stop katsuki had gotten in front of izuku and mineta and stopped the boy. " izuku stop, you have made your point and I think the little shit has had enough. I mean he has already passed out." said katsuki.

Izuku looked and Katsuki was right. Mineta was laying on the ground knocked out with his eyes rolled into the back of his head, and foaming at the mouth. Calming down, Izuku released a breath of steam from his mouth and stopped pushing his killing intent out. Once izuku did this the rest of the class took a breath to calm themselves down.

Walking away from the grape head izuku put a little distance between him and the rest of the class, not even looking at them. Izuku was thinking to himself. ' Well this is not how I wanted to start school. But why did I do that, and it is not like I was just trying to scare him. I had the urge and wanted to kill him. But it was only when he went to pony. Is it because of my animal instincts?' thought izuku. Before izuku could continue his dark thoughts, izuku felt a pair of arms wrap around him and pull him into a hug.

Izuku felt calm and looked at the person hugging him, it was pony. She was hugging him with a smile on her face. " Thank you for saving me. My hero." said pony, smiling ear to ear at izuku.

Seeing the smile and feeling her words, Izuku turned around and returned the hug. " I'm sorry, I didn't mean to scare you or anyone here," said izuku.

"Don't be sorry. You were protecting me from that creep, and I don't think the others are having the reaction you think they are." said pony.

"Your girlfriend is right idiot, they won't stop asking me questions about you. It is annoying the fuck out of me, so go and deal with them." said katsuki. Izuku looked and saw the class looking at him and he could hear them asking each other about his quirk and how cool it was.

Izuku thanking pony and Katsuki walked over to his class where he was immediately surrounded and asked questions. "Can you turn into any animal?" "What's it like to be an animal?" " How strong can you get?" " How did you breathe fire?" " Can you really fly?" izuku now understood what it was like talking to him when he muttered. Before he could answer the questions, Aizawa stopped them and got their attention.

"Alright class that is all for the day, you are free to go. Your syllabus is on the main desk. Be here ready to start class first thing in the morning." said aizawa, releasing the class to their freedom. Heading back to the class room everyone grabbed the papers and some left but a couple stayed to ask izuku questions.

" hi, im mina ashido, i thought that your quirk is so cool. Can you turn into any animal, like anything?" asked Mina, with an amazed look on her face.

"Yes but it has to be real and actually exist, so no mythical creatures," said izuku.

"Wait, if you can't turn to mythical creatures, how did you breathe fire?" asked Sero, a guy with weird elbows.

" It's not that I breathed fire, it was more of a chemical reaction mixed with heat. I made glands from an insect in my mouth that would spray a liquid that I light on fire with electrodes that I made with electric eel dna. So it's more like napalm than flame breath." explained izuku.

Everyone in the room other than pony, katsuki, itsuka, and camie realized that izuku was very smart when it came to animals, and anatomy.

"If you don't mind me asking, how did you beat my time in the 50 meter dash?" asked ida.

"Oh that was because I increased my speed by changing my legs to that of a mite that is known as the fastest creature by size, and i changed the muscles reaction in my legs to that of snap muscle, the same muscle that apes use to get there strength." said izuku.

" interesting if you don't mind me asking but how fast did you go?" asked ida

" Sure, I can tell you. I reached a speed of about 1300 mph, which is pretty fast but I wasn't ready to go that fast so I may have overworked the muscles in my legs. But luckily my healing factor healed the damage." said izuku

"What do you mean by a healing factor? Do you have a unique healing ability?" asked momo.

" I have a passive increase to my healing rate, but not to the extent that I heal crazy fast normally. I just heal a little faster than normal. But if i change my healing rate to that of a star fish and amp up my metabolism i can heal a lot faster almost to the point of instant regeneration, but it takes a lot of energy." said izuku.

To show his healing rate izuku did something no one was ready for or even expected. Izuku grow razor sharp claws and cut his arm. Everyone in the room thought izuku was crazy. Momo and ida gasped. Katsuki, camie, and itsuka ran to izuku to stop him and pony went to stop the bleeding. " izuku are you fucking crazy?" ask katsuki hold his arm with the claw away from his body.

" You guys, I'm fine. I made the nerves in my arm turn off and if you look, the wound is already healing itself." said izuku. To everyone's surprise the wound had stopped bleeding and was already getting smaller in front of their eyes, and after about 2 minutes the wound was fully healed.

"You are still a fucking idiot for that." said katsuki, releaseing izukus hand.

After answering a couple more questions, Izuku and everyone went back home, to get ready for the next day.

Next day in class

As the students were sitting in class talking to each other, someone brought up the thought of who would be teaching heroics class.

"Who do you think it will be?" asked mina.

"No idea, it could be anyone." replied kirishima.

As they were all talking, Izuku was sitting and talking to Katsuki about his quirk and how he made an explosion during the quirk test. " and after compressing the gas, i ignited the gas causing a compressed explosion and funneled it through my hand." said izuku.

" ah, so instead of igniting nitro glycerine, like me. You used a different flammable chemical." said katsuki. As he looked at the notebook izuku was writing in.

In the notebook was a list of animals and unique things each could do and the different combinations he could have. He also had his trusty quirk information notebook where he would write down different info on quirks and draw different costumes for heroes and villains.

As izuku was writing he felt a vibration there on the floor and heard footsteps coming. Looking up at the door, Katsuki got the idea that his brother heard something and that someone was coming. Just like he thought the door the class opened.

When he said it was opened, what he meant to say was the door was completely blown off the hinges and a tall muscular man was standing in front of the class with a cape blowing in the wind. 'Wait where did the wind come from?' thought katsuki.

" Good morning young heroes. I am here, as your new teacher for heroics. Think of it as hero 101, where we will be teaching you the basics of becoming a hero." said the strongest and most famous hero in japan, all might.

Everyone was excited to see all might as their teacher and they were ready to see what the number one hero could teach them.

" alright young ones, we will be starting off the day with some practical training, in the form of battle trials." said all might pulling out a board out of nowhere with the words battle trail on it.

" but to be a hero in this world you have to look the part. Now take these and meet me outside training area beta." said all might as the wall next to the students opened to show 20 briefcases with the names of each student on them.

Everyone ran to get their costume and to try them on, running to the changing room everyone was happy to see that they are truly becoming heroes. Izuku was the first person out and he was happy with his costume.

Izukus costume was made from a special fiber and silk that he produced to change and stretch with him. He was wearing a red and green long sleeve shirt with white strips on it that looked like claw marks. His pants were long and tight around his legs, which would be a little loose near the hips to give him more freedom of movement while keeping protection. His pants also had the claw like white marks. He also had a pair of special shoes he had made that were like the rest of his suit but they had a bit more firmness to them. Izuku also had unique glasses or goggles that folded out from a ear piece he had that could cover his eyes, mainly to stop things hitting his eyes because he was moving fast. Finishing off the costume was what looked like a black cape behind him.

All might was stand a little distance away from the entrance, he was excited to see his young inheritor of his quirk, but he also was interested in another student. Izuku Midoriya, a young strong student who to him is a very caring and protective person. All might could tell that the kid had trained before coming to the school, he also saw the amount of control that the young hero had with his quirk.

' with his intelligence in the field of zoology and anatomy, young midoriya would be a great and successful person but mix in his strong quirk and he is one of the most powerful people in the school, maybe even in japan. It also means that if he was to ever turn he could be a monster, but luckily he has a righteous heart.' thought all might be looking at izuku.

Izuku could hear the voices and footsteps of his classmates coming and when he turned around he was excited to see all the costumes that his classmates had.

The first person that he saw was his brother Katsuki and he had the costume they both helped make which was like a big sign that said explosions here (same as cannon). He saw some of the guys and their outfits looked like they all had effective use of their quirks and to not hinder movement. With ida looking like a knight, danki had a electric punk look, kirishima was topless with red gears, sero was a tape dispenser, koda looked like a duck but he was interesting to izuku seeing that his quirk didn't work on him even tho he is a animal, shoji was a tall guy with 6 arms so his suit was a little basic, fumikage was black on black which made sense, shoto was in a climber suit with a weird metal vest on, then there was shinso who looked like a ninja with a black cloth covering his mouth instead of a mask, similarly to how would wear his scarf.(all cannon, other than shinso).

When izuku looked over to the girls he froze and was trying not to faint from blushing. The girls in his class were most definitely attractive and to add the fact their costumes just made them look better. After composing himself he looked at the girls again to get a better look at their costumes. Ochaco was wearing a skin tight pink suit and a helmet that made her look like a astronaut, asui was in a skin tight frog suit, mina was in a pink and purple skin tight suit with a domino mask on, jirou looked like a rockstar, and then there was momo who… 'wait is that even considered clothing?' thought izuku looked at momo who had a red leotard and a short yellow skirt and that was it.

'Wait where's…..' izukus thoughts were cut off when he saw a mist surround him. Looking around him, Izuku couldn't see anyone, but he knew who could do this especially with the mist. " Camie I know it's you." said izuku, before feeling a hand slither its way up his stomach with the mist in front of him fading, revealing camie standing in front of him wearing her hero costume.

"So what do you think handsome?" asked camie leaning seductively against izuku, who was trying his best not to blush at the action and the costume. Camie was in a full black bodysuit with black boots, and a police cap and a whip.

Izuku got a very good look at her costume and to say it fit her was an understatement. " it is… definitely….. Your style." said izuku trying his best to not stutter and failing. But before camie could do anything else a strong gust of wind blow the mist away, showing pony and itsuka whos hands had grow to massive size, standing in the hero costumes looking at izuku and camie.

" you seem to be enjoying your time, with izuku." said pony with a smile too kind to be real. It scared izuku to his core. But izukus fear was pushed aside when he saw there costumes. Pony looked like a cowgirl from the midwest of America, Will itsuka was wearing a martial arts kip pow. In all the costumes suited them and their styles.

While talking to the girls about their costumes and what they might do for the lesson, izuku heard someone call his name. Turning around he was face to face with another student. " So your izuku, it is nice to meet you. I'm Melissa Shield, would it be ok if I asked you about your quirk?" asked melissa.