Izuku was having a good day. Then again, he had been having nothing but good days since he came clean about the apprenticeship and his status had been upgraded to full intern with Recovery Girl six months later. The agencies that dealt with issuing pro hero licenses had made an agreement with Nezu, upon learning Izuku was more likely to spend time inside a hospital or outside the actual battlezone to patch up pro heroes than fight villains. He had to graduate from UA from one of the pro hero classes, and he would get a full hero license.

While his relationship with his mother had become slightly strained, she was honestly happy for him because his dream was that much closer to becoming true.

The only catch was that he had to wait a few years since Nezu didn't want to enroll him as a 'student' for the pro hero courses until he was at least fifteen. There would be enough friction from a quirkless student technically being part of the Hero classes, and he didn't want to compound it due to Izuku being younger than everyone.

Besides, this allowed Izuku to complete the necessary real-world experience needed for a full medical license. He didn't really care either way so long as he was allowed to become a pro hero officially.

Hearing a commotion, he naturally went to see what was going on. Since he had an 'intern license' with Recovery Girl, he could legitimately intervene in a villain fight without getting yelled at for it later.

Seeing a familiar head of blond hair, he had to stare for a moment before his mind registered exactly what was going on.

Without thinking twice about it, he dashed forward and kicked Bakugo so hard that he was sent flying out of the living slime. Obviously it was a villain who was planning to use Bakugo as a hostage, but from the looks of things the villain clearly wasn't all that concerned about keeping the idiot alive.

With the ease of long practice, he pulled out something he kept handy ever since Power Loader brought that crazy girl into the support classes a bit early.

He doused both the villain and Bakugo with roughly the entire contents of the fire extinguisher he had on him...causing the slime to stiffen up enough that the heroes could deal with him and insuring Bakugo was too cold to produce enough sweat to attack him for the kick.

It was only once the shock wore off (roughly three minutes after he arrived) that the pro heroes snapped out of it long enough to yell at him for interfering.

The glare he gave them could have frozen water, it was that bad.

He merely flashed his intern badge before leaving his statement with the heroes waiting outside the area, and headed to UA. He had some irritation to work off.

A few days later...

Izuku was rather curious as to why the principal called him in specifically. Outside of general paperwork, testing and the odd chess game, he rarely had an interaction with Nezu. Though he knew the chimera was actually rather fond of him.

Seeing a skeletal man inside, he knew something big was up.

"Ah, Midoriya-kun...come in, come in!" said Nezu cheerfully. "Tea?"

"Yes please," said Izuku calmly. If the principal was bringing out his Earl Gray, then the discussion couldn't be that bad. He usually brought out the really good stuff for major discussion.

Once they were all settled, Nezu went directly to why he had called Izuku in.

"I want you to meet Yagi-san. He's going to be in charge of the mock hero/villain battles next year," said Nezu. "Yagi-san, this is Midoriya Izuku. He's the unofficial teacher's aide for the school, as well as Chiyo-sensei's personal intern. He will be your supervisor during the mock battles."

"Supervisor?" repeated Yagi in surprise. "I thought he was being slated for the pro hero class next year."

"Despite your impressive track record as a pro hero, the simple fact is that you have no real experience teaching students...much less hormonal teenagers," said Nezu bluntly. "Izuku however has at least two years of interning with Recovery Girl and is mostly working towards a provisional pro hero license. We're mostly sending him to 1-A next year to help socialize him a bit more, since he won't actually be studying with them full time. It would be rather silly to stick a fifteen year old who has successfully gained a medical license with teenagers who are just starting their journey to pro hero."

Yagi stared at Izuku.

"You have an actual medical license?"

"Passing the written exams with a high enough score was easy, but I needed three years of real world experience before I could legitimately call myself a doctor. Fortunately apprenticeships are still acceptable to the medical community, and as long as I know what I'm doing it's all legal. The hero license was the only issue, because you have to be at least eighteen to obtain one," said Izuku shrugging. "I have at least three patents to certain medications I've created, and one of them is about to be mass produced for the public."

"Very impressive!"

"Not really. All I did was come up with an additive for commercial eye drops. Once the people who regulate new medicines clear it for public use, it's going to be an optional prescription for those who have eye-based quirks," said Izuku.

Which was the ONLY reason it was being used for human trials in less than five years. However the fact a kid who hadn't even hit puberty came up with it was enough to get people's attention.

"Now about the reason I called you both here. Izuku, I want you to act as the primary teacher's aide for Yagi-san's villain versus hero lessons."

"The one where the class is divided into two groups and pitted against each other in mock simulations against villains?" asked Izuku. Nezu nodded. "I had wondered why the primary teacher for that class was removed from the first year roster."

"Principal, I thought young Midoriya is going to be a student?"

"Ah, but his case is rather unique. Midoriya will be attending the hero lessons this year as a participant...however his status is that of an apprentice to Chiyo-sensei. The hero classes are more of a formality and to prepare him for his provisional license upon graduation," said Nezu.

"Provisional license?" repeated Yagi incredulous. He didn't know there was such a thing.

"I'm quirkless. Since the administration refuses to allow those without quirks to apply for a hero license, the best someone like me could do is a provisional license that allows me into active villain fights," explained Izuku. "Only certain professions can get them, and I chose doctor because then I could actively help people much like All Might does. Not every hero has to have a flashy quirk to save others and make them smile like he does."

It would only be a little while later that Izuku learned why Nezu looked like he was desperately trying hard NOT to laugh his ass off about something, or why Yagi seemed to be embarrassed/happy at Izuku's words.

"Are you sure this is a good idea?" asked Yagi nervously.

"You're here to find a successor, and this way the staff will be more at ease knowing the class is in good hands. While your track record as a hero is rather impressive, the simple fact is you've never taught teenagers before. On the other hand, Izuku has already proven invaluable as a teacher's aide to the others and knows what to expect in your class. He's mostly there to insure nothing goes wrong with your class, since he's qualified as a field medic."

"I also help with grading, since the hero classes don't really have written work," said Izuku.

Yagi was clearly unsure about having a helper, but agreed to it. After all, if what the principal said was true, then the boy had experience.

Besides, he vividly remembered the teen's reaction to the slime villain and how he rescued the hostage while the actual pro heroes just stood there.

Several months later...

Izuku adjusted his 'hero' costume as Mei had dubbed it. He wore a professional doctor's coat, along with a rather smart suit his mother insisted he wear to look more professional. Around his waist was one of Mei's creations, and it reminded him strongly of the bat-based vigilante from pre-quirk comics, only his buckle (which was interchangeable) looked like a gear instead of a bat. He also had a near indestructible field medic's kit courtesy of Power Loader.

Mei was still working on the satchel that he had come up with while during one of their many movie nights. The girl was thrilled to have a fellow fan of the pre-quirk stuff, and Inko wouldn't be surprised in the least if her son ended up dating her.

He finished it off with comfortable boots...most doctors were on their feet all day, so there was no point wearing fancy shoes that would only serve to cause pain. Besides, these were special as they contained hero gear that was still under development.

He checked to make sure his appearance was good, before slipping on the final touch...a card that would allow him to bypass the security system at school and clearly marked him as a teacher's aide at UA.

"Mom, I'm heading off!"

"Have a good day!" said Inko.

Their relationship was still slightly strained, but once the initial shock wore off and she realized her son was serious about his new profession, she supported him fully.

Today was going to be an interesting day.

At UA, during the first class...

Aizawa wasn't the least bit impressed with his current class. Particularly since he was unlucky enough to get the blowhard known as Bakugo Katsuki.

He had seen the scarring on his favorite assistant, and he knew this brat was the cause of most of them. He might have been able to fool the therapists, but there was no doubt the brat's ego was still out of control.

The second Izuku found out the boy was in 1-A, he had immediately demanded that he be allowed to carry the portable fire extinguisher Mei had created for rescue heroes so that he could douse Bakugo with the freezing cold foam before he could use his quirk.

Izuku had become rather quick to fire that foam, and he knew exactly what Bakugo was like. The second the brat found out Izuku outranked him and was merely killing time until he reached the mandatory age before he gained a hero's license, he would almost certainly snap.

Everyone was quickly seated, and right on time Izuku walked in.

The student's eyes were immediately on him.

"If you survive your first day here, then you'll get to know this person well. His name is Midoriya Izuku and he's the apprentice to Recovery Girl in the infirmary. In between healing the students, he acts as the primary teacher's aide to the staff. He'll be assisting in the mock hero and villain battles you'll have tomorrow."

One of the more straight laced teens raised his hand.

"Sir, how old is Midoriya-san?" asked Iida, not really noticing the fact that one of the students near the front was already starting to boil over in shock and recognition.

"I'm the same age as you," said Izuku with some amusement. "In fact I used to attend school with one of your peers in this classroom before I secured an apprenticeship."

Izuku calmly turned to the angry blond who was starting to get over his shock and was already showing several signs of blowing up.

Right before Bakugo's boiling point reached critical, Izuku calmly and with no little amount of dark glee sprayed him with the foam.

Disbelief filled the room, as Bakugo started swearing.

"You fucking nerd! How the hell did you get into UA before me?!" snarled Bakugo.

"I not only beat you to UA, Kaachan, but I actually outrank you here. You're just a student," said Izuku with dark glee. "Oh, and before you get any ideas that I'll be your punching bag again, the principal has made it clear that any more of your bad behavior from before will not be tolerated in the least. Either keep your ego in check and learn to behave or find a new school to apply to. Though I sincerely doubt any hero school will take you if they find out why you were thrown out."

Bakugo was livid, and the rest of the class had a sudden epiphany as to which student the TA had gone to school with.

"Wait, what do you mean if we survive the first day?!" said one student, having finally caught Aizawa's warning.

Izuku had a look of amusement on his face.

"Didn't you know? 1-A's teacher is rather infamous for throwing out entire classes if they don't prove they have the right mindset for hero work. If you're here for fame, glory and the money, you better start praying now. For those of you who actually do have it in you to be a great pro hero, well you couldn't ask for a better teacher."

Seeing the expression of foreboding in their eyes, Izuku had to repress a cackle. There was a reason he was tea-buddies with the principal after all, and it had little to do with the fact Nezu found him fascinating.

The chimera had found the perfect outlet for his sadistic tendencies, since he couldn't get away with it as much as he liked. Having Izuku show up the regular students with the flashy quirks was a source of great enjoyment to him.

Especially when said students found out they were one-upped by a quirkless apprentice!

Bakugo was beyond livid...especially when he realized that the situation between him and the fucking nerd had been reversed. Not only did Izuku have power over him, but it was sanctioned by the teachers!

Every time he even thought of using his quirk, that damn Deku would douse him in that cold foam, cutting off the necessary heat to produce his special sweat! The only good thing was that they passed whatever requirement was needed to please the stupid teacher, but that was the only positive in his shitty day.

He stormed home with a pissed off expression and nearly blew up at his mother who innocently asked how his first day had gone.