After the exam, Hayato went home with a pleased Katsuki and a completely devastated Izuku. Hayato told Izuku not to worry but he still did, so Hayato just shrugged his shoulders as he knew what was gonna happen anyway. All of them went their separate ways and went home when they reached their neighborhood.

Hayato entered his house and spoke to his mom for a little while, along with his dad. They didn't seem worried as they knew Hayato's strength was more than enough to pass the test for the U.A. Hero program. Hayato soon went to his room to think about something that had been bugging him for a while.

'Why can't I use my energy more efficiently? If I keep spending my energy so quickly, I'll never win in a prolonged fight.'

Thinking this, Hayato tried to think of ways to use his energy better.

His body was akin to an engine, so Hayato knew that he had to find where the fuel tank was and put a limiter on it, or at least try to control the flow. This started Hayato's small training period before joining U.A. so he at least had something to go off of when the teachers tried to help him improve.

1 week later~

Hayato got the admission hologram for U.A. and had a small celebration by going out for food with his family. Hayato got plenty of food that day.

After that, Hayato started his search for the 'fuel tank', as he called it. His method was to meditate and repeatedly enter and leave [Oni Mode]. This put him on a trail towards somewhere in his upper torso.

At first, Hayato thought it was his heart that was giving out the power but soon dismissed that theory as it wasn't coming from there.

'It's much harder to follow an energy trail than you'd think it'd be.'

Hayato couldn't help but grumble internally about how slow his search was going. Suddenly it struck him on what he could do.

Quickly, Hayato ran downstairs and grabbed a few plates of food before running back upstairs in excitement.

'If I can't trace it back from where it came, I'll follow it on it's way to the 'fuel tank' .'

Convinced that this was the way to go, Hayato started eating the food and when he'd sucked it all into his stomach, he started meditating to see where the energy generated would go. It was a slightly slower process but Hayato was patient enough. The energy first came from his digestive system, like he thought it would and it traveled in a straight line right to just below his sternum. Pretty much where his diaphragm was.

Hayato couldn't help but let a smile spread across his face as he'd finally made progress.

'Now, to limit or control the output!'

Another week later~

Hayato had worked out that he had a full capacity of 400 points of this energy. Kind of like a stamina bar in a game. He also worked out that he used 50 points of this energy when he entered [Oni Mode] but the worst part was that he only need 5 of these energy points to enter the mode. He also uses up 1 energy for every minute he's in the mode.

'I'm that inefficient at using my energy? Goddamnit.'

Were Hayato's thoughts at the time he found out. He also found out that he can enlarge the 'fuel tank' via a few ways. They are:

-With enough usage of the energy inside it, the 'fuel tank' will naturally get bigger for some reason, Hayato doesn't really understand why but he's still trying to figure it out.

-By eating a lot of food. Some food gives more energy, usually depending on how high the quality of the food is or how nutritious the food is.

-This one ties in with the first way but if Hayato does an especially intense workout, the energy will grow further if he eats a lot after working out. Again, Hayato doesn't know why it does this.

And those are the ways to grow the fuel tank, and Hayato is employing them all to make sure his 'fuel tank' is bigger.

He's also been trying to improve his control over the energy. So far he's got the energy down from 50 per activation to 40, the joy he felt from his quick progress was short lived as going down from 40 to 39 was incredibly hard for some reason and Hayato couldn't figure out how to break past the limit he currently faced.

After trying for the better part of a week to break through it, Hayato thought that he might as well focus on improving his body, at least he'd get some quick-ish results with that. Weirdly enough his horns were releasing more and more of that hormone. If before they released, for example, a drop or two a day then now they were releasing 5 drops a day. It was like his body knew he was going to be fighting a lot of people soon, whether it be in a competition or against villains.

And because of this, his appetite increased.

'At least it lets me expand my energy storage further.'

2 weeks later~

After two weeks of intense training Hayato had increased his energy storage to 450 energy points and like his control problem, he hit a bottleneck. Even though he hadn't plateaued physically, it seemed the energy storage was refining the energy in his body that he'd gathered over the past 2 weeks. Sensing this, Hayato hoped that it would finish refining soon because he felt the storage shrinking.

Overall, after the training and the increase in the "Oni" Hormone in his body, his strength has grown quite a bit in his base form meaning his other two forms, [Muscle Form] and [Oni Mode], have also grown in strength.

Today was the day Hayato started at U.A. and he was excited about what he knew was about to happen when he got there. Rapid knocks rang throughout the house as Hayato was just finishing his breakfast. Speeding up his eating as his mom answered the door, knowing what was about to happen, Hayato sped up his eating but he was a tad too late.

"Awww Midoriya-kun, come to Aunty Tagami!" Hayato's mom rushed up and hugged Izuku.

Hayato dragged his hands across his face.

'Poor Izuku, to be in that old hags grasp...'

Hayato walked up to his Mom, who was smothering his dear friend to death and pried her off of him. His mom seemed momentarily surprised by his strength before she relented and let go of the gasping Izuku. He didn't look good at all like he was some kind of victim.

"Sorry about that Izuku, she's a demon and you didn't need to experience that." Hayato said in a mock sad voice and face but he knew full well how bad it was when he one hugged someone seriously, it was like being in the clamp of a vice. A shiver went up his spine as he thought about the past times it happened to him.

"Well, we're off Mom, bye!" Hayato said this in a hurry as he grabbed his bag and his childhood friend and ran out of the house with speed and nimbleness that belied his physique.

Soon he and Izuku were far enough away from the house that Hayato felt it was safe to put Izuku down and stop running. Even though he wasn't the one who was running, Izuku was breathing very heavily, looking at his face, Hayato worked out that he was incredibly nervous about the U.A. first day. Hayato couldn't blame him, even with his quirk and current power, Hayato was also quite nervous.

Arriving at the school, Hayato and Izuku went towards class 1-A, the class they'd been put in.

Unlike in the show when Izuku nervously waited outside the door, Hayato just opened the door and walked in with an arm round Izuku's shoulders and dragged him with him. As they entered, everyone looked at them. Some with shocked expressions, some with friendly expressions and some with expressions of slight hostility.

Hayato just confidently smiled towards everyone in the class, while Izuku stood shocked. Suddenly, there was a voice behind them, a voice Hayato had been waiting for. "Wait! Is that you, the boy from the exam? I'd remember that messy hair from anywhere!" The voice spoke in a very straight-forward way. It was Ochaco Uraraku.

Izuku turned around in shock as his face went red as he saw who was talking to. Hayato pushed him towards her and smirked at his friend's embarrassed behavior.

'Haha, time to play Cupid~'

As he thought this, someone tapped his shoulder.

"Ta-ga-mi-kun~ See, I knew we were gonna be friends!" A familiar outgoing voice spoke out behind Hayato. Hayato froze on the spot as a twitch appeared on his face. He turned around to look at the person behind him.

With orange hair draped over her left shoulder and her piercing green eyes looking right into Hayato, it was Kendo Itsuka.

Looking at her, Hayato was shocked.

From the classes perspective Hayato and Izuku looked the same; Both of them shocked solid in front of a girl.

"H-hello Kendo-san." Hayato blurted out a reply to her greeting with a slightly flushed face because of how close she was to him.

Kendo smiled and was about to speak before someone spoke.

"If you guys came here to make friends, you might as well leave now."

"Ahh!" surprised, Kendo, Ochaco, and Izuku let out a small yelp of surprise. Hayato, however just looked at a man in a yellow sleeping bag with a blank look on his face. The others all looked at a yellow sleeping bag on the floor with a face sticking out of the top end. The man had a tired and worn out look on his face as he looked at the students.

What the man wasn't expecting was for Hayato and Kendo to go up and poke him. Well, Kendo poked him and Hayato lightly tapped him with his foot.

"Kendo-san, how do you think a giant caterpillar got in here?" Hayato said this in an inquisitive voice as he tapped the sleeping bag with his foot.

"O-oi! Stop that!" the man said as they kept poking him.

"I don't know Tagami-kun, is it some kind of mutant quirk?"

"Enough!" the man yelled as he stood up and got out of the sleeping bag and then continued to speak in his tired voice "Just...Put these on." as he finished saying this, he pulled out a blue uniform which Hayato recognized as the U.A. P.E uniform. When someone asked him who he was, he said he was Aizawa Shota, their homeroom teacher. Everyone felt shocked that he or she had such a shady looking homeroom teacher but they soon took the uniforms off of him.

A few minutes later, everyone had changed into the uniforms and walked to a test site by following Aizawa-sensei.

"Okay, we're gonna be doing a Quirk Apprehension Test."

After he said that there was a wave of confused whispers among the students of the class. Aizawa-sensei carried on speaking "You've all done the physical tests throughout middle school, right?" Everyone nodded as he carried on "But without your quirks. And because you're in the hero course, we need to see the capabilities with your quirks. Bakugo, what was your longest throw with a softball in Middle School?"

Katsuki lifted his eyebrow at the question but he still answered "67 meters." Hearing his answer, Aizawa-sensei called him up to throw the softball again but with his quirk this time.

Katsuki stood in the circle and prepared to throw the ball in his hand. When he threw it he activated an explosion that sent the ball high into the sky. With a bleep on the phone in Aizawa-sensei's hand, he showed the class that Katsuki had thrown the ball 705.2m.

"The fact is, people are born with more power than others. The thing the schools tried to do by banning you from using your quirks was to make people feel like they weren't being left out if they had weak quirks. Oh and the person who performs the worst on this test will be expelled as they've shown they have no potential." Aizawa-sensei spoke in disdain of what the schools did. It seemed to annoy him that people with good quirks could shine ahead of others. He also dropped a bombshell on the students, which caused a small uproar.

'Well, that or he was trying to rile up the group of students. Clever guy.'

After Aizawa-sensei's little rant, they went onto the tests. First up was the 50m dash.

Hayato lined up next to Iida Tenya. While he was getting ready he pulled energy out of his core and sent it to his legs. This was what he'd come up with to save energy; Instead of just opening the gate to his core of energy, he guided out what he needed and it saved a lot of energy.

Once it was in his legs, he augmented them and like when he usually activates his quirk, a thin armor of muscle appeared on what he was augmenting. He got into a proper running position and waited for the mark to go--

"Go!"

'Well, there it is~'

At the sound of the mark, Hayato pushed off the ground with considerable force, cracking it in the process, he shot off of the starting line. Even with the amount of power he put into his legs, he was still a short bit behind Iida.

Hayato guessed this would happen seeing as Iida's quirk is made for speed while his quirk is made for power. While his quirk does give him explosive speed, Iida's gives him a constant speed.

Iida and Hayato crossed the line soon enough, their times were 3.04 and 3.89 seconds respectively. After that, everyone's results were as they were in the show.

They then moved onto grip strength. Hayato decided against using his quirk for this test as he didn't need to. It wasn't about him hiding his strength, it's just he could use his natural strength to beat all the others. He put some strength into his hand and the numbers 1500kg popped up on the screen.

"Woah, you really are strong, Tagami-kun." quipped Kendo as she peeked at his monitor. Her remark attracted the attention of the other students whom all look at the number in awe. Hayato just shrugged his shoulders as he waited for the next test.

The next test was the standing long jump and Hayato just jumped with his quirk activated and jumped right over the sandbox. Then he had repeated side steps, which he just did at an incredibly quick speed with the help of his quirk. From this test, he found out that Mineta wasn't here either.

'Must've been put down to class 1-B when Kendo got into class 1-A.'

Pushing that thought to the back of his head, he moved onto the next test; The Ball Throw.

Hayato decided to really go all in on this test, so he summoned his full muscle form and got into a baseball pitching stance.

'This ball is so much lighter than the one I threw over a month ago. This is gonna be easy~'

He tensed his body up and threw the ball with such celerity that by the time people realized he had thrown the ball it was already high in the air and had left multiple rings of cloudy air from its speed. After a while, it landed and Aizawa-sensei looked at his phone and nodded his head as he read out the result of Hayato's throw

"1103.3 meters, well done Mr.Tagami." he said it in an apathetic but well-pleased voice.

Hearing this, Hayato was also pleased and walked back over to his fellow peers who were all in a stupor, apart from Izuku, Kendo and Eijiro whom all had smiles on their eyes and Hayato would've sworn he saw sparkles of light in their eyes but he soon shrugged it off as him not sleeping enough.