The classes through the rest of the first day were rudimentary introductions to the courses. Classes from Japanese history, grammar, algebra, and biology were all fairly simple with their teachers merely going over the syllabus and the course calendar for the semester. The other three classes were what they were looking forward to the most, Hero History, Law and Hero work regulations and finally Heroics 101 were the classes that the students in 1-A couldn't wait to get to. Granted, the law hero regulations course wasn't exactly the most captivating premise of a class they had to endure but it was a necessary evil that they had to understand in order to become heroes. With the chime of the final bell before heroics 101 sounding off in the middle of Aizawa's monotone speech, he dismisses the class allowing them to excitedly rush to Heroics 101.

Getting to the classroom a few particular things catch the eye of the students, starting with the lack of a nameplate on the desk and podium in front of the class. However around them were more things to distract from that small detail. From behind the class they could see a CPR dummy flat on a table waiting to be used, several first aid training kits as well as anatomy charts and even a mannequin wearing a hero costume. Each of their desks had their name printed on it with a small brass plaque on the front signifying their spot in the classroom. Izuku walks towards his seat, taking in all the decoration about the room before being quickly followed by Katsuki who smirks seeing his friend's enthusiasm for the class they're in.

"So, what do you think were gonna do here today, Deku?" Katsuki asks, watching as the rest of the class funnels into the room. "Probably more syllabus crap. Though it'd be nice if we could actually do some training on the first day."

"Yeah It'd be nice but I don't think that's gonna happen. Midnight or Ectoplasm are probably gonna walk in soon, hand us a syllabus and go through the same song and dance routine they did earlier. I remember UA saying that All Might was going to be a teacher here, what course is he tea-" Izuku was abruptly cut off by the booming voice of his master from the other side of the door.

"I am..." The words instantly cause the class to stop talking and turn just in time to see All Might burst though the solid wood door causing it to splinter everywhere. "Coming through the door like a.... Oh... I forgot to open it first." Izuku face palms when All Might bursts through the door. However the door destruction is completely ignored by the class as they burst into cheers upon seeing the number one pro hero. Comments on his retro hero suit and how amazing it is to have him as their teacher flood through the room. All Might raises his hand getting the students to quiet back down before he dusts off the door debris from his hero suit and walks behind the podium. "Welcome to Heroics 101 and today we're not going to be doing syllabus reading. No, today we're heading to training ground beta, you fledgeling heroes need as much field training as possible starting today. Oh and before I forget, What are heroes without their hero suits?!"

With the push of a button the wall on the far side of the classroom sinks away revealing cases containing the students' hero suits. Labeled one through twenty each of them excitedly ran over to their hero suit and made off with it rushing to the locker rooms to get changed and ready for today's hero training.

At Training Ground Beta

"You all truly look the part of aspiring heroes!" All Might booms upon seeing the class arrive in full hero costume. "Now without further ado, today's training will be Combat Training!" His booming decree is followed by mixed responses from the class, some excited for the coming exercise and others a bit more apprehensive about what is to come. "You will be split into ten teams of 2, each team will be either a hero or a villain team. The villains will be protecting a fake nuclear warhead inside the building behind me here. They're allowed to move it to any floor they wish and must either subdue the heroes or survive the 15 minute timer without being captured by the hero team." All Might begins before looking around for a moment and furrowing his eyebrows. He lifts a hand and points to the individual members of the class doing a headcount when he realizes there's someone missing. "Where's young Midoriya?" He asks, causing a few members of the class to shrug.

As All Might tries to figure out where his successor is, they begin hearing a series of rapid footsteps running towards them. As he gets closer and closer a few of his classmates turn and look at him as he finally arrives at the training site. "Woah..." Kirishima is the first to speak upon seeing his hero costume. "Mama Likey." Mina says as she bites her lip, "Holy crap." The voice of Kyoka Jiro pipes up but Momo and Ochako have a very similar thought almost at the same time. "Oh no he's hot!!!" Dressed in armored boots and the large baggy pants of a martial artist's gi, Izuku arrives at the battlefield. Around his waist is a long green silk belt wrapped to just above his navel with two long tails off to the side of him. His stomach and abs are exposed by the same puffy short vest jacket that all his fusions wear. "You wouldn't believe how long it took me to get that belt on." Izuku says as he rubs the back of his head sheepishly.

"Well, now that everyone is here let's get this party started! I'm going to choose a student at random and you shall come up here and pick a name from this fishbowl. That person will be your partner for this activity. Once all teams are partnered up, I'll assign letters to your teams and then see who fights who for this match! Now, since you were late, Young Midoriya, you will be the first person to choose your partner." All Might says, causing Izuku to talk to the front and dip his hand into the fishbowl before pulling out a piece of paper. He unfolds it and smiles before turning the name over. "Katsuki Bakugou and Izuku Midoriya are Team A!" All Might declares, causing the two boys to walk up and fist bump each other. After a few short minutes, the teams are decided and All Might writes them down on a board beside him.

Katsuki Bakugou and Izuku Midoriya

Shouto Todoroki and Mezou Shouji

Minoru Mineta and Ojiro Mashirao

Tenya Iida and Momo Yaoyorozu

Mina Ashido and Yuga Aoyama

Koji Kouda and Rikido Sato

Denki Kaminari and Kyoka Jirou

Fumikage Tokoyami and Tsuyu Asui

Ochako Uraraka and Hagakure Toru

Hanta Sero and Eijirou Kirishima

With the teams selected, All Might walks over to a second table where two boxes of lettered balls are. "Now! Let's see who we have for the first match!" He shouts with his prominent wide grin before putting his hands into the boxes. He feels around for a moment before grabbing two tennis balls. "The hero team is Team D vs Team A as the villain team!" He says and while Izuku is slightly disappointed in having to pretend to be evil, Katsuki is all too excited to wear down the knuckles on his gloves. "The villain team may enter the building and prepare for the combat event. The hero team's time begins when they enter the building." Izuku and Katsuki almost sprint to the building to begin the time, and despite not knowing what All Might had said, Izuku can just fuse with Katsuki and figure out what happened from there.

"Alright, what's the plan Kacchan?" Izuku asks as the two get into the first floor before finding the paper mache bomb inside. "Since we're the bad guys here, I'm assuming that we have to protect this until time runs out?"

"That's basically it, now grab the other end of this thing and help me hike it up to the roof." Katsuki says, prompting Izuku to run over and grab the bottom end of the weapon before helping him take it up stairs. "How are we gonna fight those two? I saw a bit from ponytail this morning and she seems like much more of a threat than glasses is."

"Iida's a speedster but I don't think that this morning was his top speed. Honestly our best bet might just be fusing into Izutsuki." Deku says as they start taking the dummy bomb up stairs. "For something made out of paper mache, it's really heavy." He complains.

"That's because only the insides are paper, Deku, the rest of it's just metal." Katsuki adds as they round the corner up the first floor and into the stairwell of the second. "At least this building is only 5 stories tall. It'd suck if it was 10 or more."

"You say that like going up five flights of stairs is a good thing." Izuku says.

"Don't you live on the 4th floor of your apartment building? I'm pretty sure it doesn't have an elevator either." Katsuki complains.

"We're only on the third floor." Izuku adds. "I'm just saying, there's a reason why the elevator was invented." He adds before setting the bomb down. "Speaking of," He says before walking over to an actual elevator in the fake building. "Think it'll fit?" He asks, looking at the interior dimensions of the elevator.

"That's what she said."

"Shut up and help me put the stupid bomb in here, I'm not hiking that stupid thing up another 3 floors." Izuku shouts before hitting the button on the elevator only for nothing to happen. "Fuck."

"There's no power to the building dumbass, we have to do this on foot." Katsuki says before walking over and smacking his friend on the back of the head. "Come on, the sooner we get this done, the sooner we can fuse and kick some ass."

It takes the two almost the entire fifteen minutes to hike the bomb up the rest of the stairs, by the time they actually get it situated on the roof, they hear All Might declare the match starting. Izuku almost makes a stupid decision to try to look over the roof to see if Iida and Momo had entered the building or not. Katsuki partly can't believe that Izuku even made such a dumb decision but left only with assumptions, they decide to go ahead and fuse. The two break into the fusion dance they've always used and perfected, easily executing the technique. The familiar flash of light and orange and green tornado of energy encompass the two fighters. The light alerts Momo and Iida to their position up on the roof prompting the two to rush up stairs towards the fused fighter. "Yoshaaa!!!" Izutsuki declares as he manifests once again in front of the bomb.

As Iida and Momo get to the top floor they see the fused fighter in a slightly different attire than he typically had on. His arms have Bakugou's large grenade shaped gauntlets and on the left side of his head is one of the flared wings of Bakugou's mask. The left side of the puffy vest the fusion wears is the gun barrel rack that sits on Katsuki's hero suit. "It's a shame that we have to fight a pretty girl and a nerd, I don't think this fight will be all that even if you ask me." Izutsuki boasts, "Tell you what, why don't I even the odds a bit, besides there's something with Izuku's quirk that I've been dying to try out." Izutsuki says, offering a sort of olive branch to the two fighters. "There's no way we'd willingly allow you to use your quirk on us, Evil doer!" Iida declares doing his best to sound as heroic as possible. Beside him, Momo creates a large bo staff and holds it in a fighter's stance preparing to face off against the fused fighter. "Ha! You say that as if you had a choice, four eyes."

The fused fighter grins as he begins to charge One for All through his veins, his muscles bulge, he gets taller and his hair begins to spike up as yellowish green lightning begins arcing around his body. Iida and Momo look to one another, trying to figure out what to do against the fused warrior, Momo tosses her bo staff to Iida then creates a sword from her stomach in order to defend herself from the fused being. Izutsuki smirks seeing the created weapon before flexing his muscles and aiming his hands behind him, he crouches into a runner's stance before setting off two massive explosions from his palms and lunges forwards. In a burst of yellow light, the fused fighter vanishes leaving only the trail of smoke and fire behind himself. The two would-be heroes are left stunned by the sheer speed of the fused fighter and in the observation room, even All Might has trouble keeping track of Izutsuki. Expecting an attack from behind, Momo quickly turns and raises her sword, trying to cut down where the fused fighter will appear. However, as she attempts to swing, she finds her arms are stuck and unable to move. "Come now, trying to cut me down before I can even strike? That's not very plus ultra of you." The fusion says from behind her as he easily takes the sword away from her. "You're gonna need more than that to take me down, my dear." The fusion says, causing Momo to turn and look in horror as Izutsuki folds her katana as if it was a piece of paper. Beside the fusion, Iida takes a swing with the bo staff but suddenly part of the fusion's right arm glows and a second arm emerges and catches the staff in his palm.

In the observation room.

"Woah," Ochako says, having seen the fusion temporarily split his right arm in order to stop the attack. "When Midoriya and I fused during the entrance exams, Izuko didn't do anything like that and he had a quirk that was quite a bit different than mine."

"What do you mean?" The white and red headed boy named Todoroki asks.

"Izuko had a full fledged gravity manipulation quirk, I can only make things weightless." She says before demonstrating her quirk by using it on her helmet causing it to float. "He was able to extend a hand, and ball up his fist and crush that zero pointer into a tin foil ball."

"That was you?" Aoyama asks, causing the brunette to turn to look at him. "I saw that flash of light then that genie looking man appeared and I saw you two destroy the robot. From what I saw of Monissure Midoriya's quirk was that he can fuse with objects like the guns on the zero pointers."

"From what I know, those two have been acting as the vigilante known as The God of Destruction. They've stopped bank robberies, purse nappings, murders and a few shootouts with heroes on multiple occasions while they were in middle school." All Might says. "Truth be told, I've known those two long before I started teaching at UA, and have even taken them under my wing as an unofficial sidekick of sorts."

"Doesn't it seem a little unfair for Iida and Momo to be facing off against them then?" Todoroki adds.

"While that may be the case, in the world of heroics you will almost always be at a disadvantage. Villains will use any opportunity they can manage to get the leg up on a fight. Whether that's taking hostages, harming civilians, destroying buildings or anything of the sort it is your job to try to take them down or prevent any more damage from taking place." All Might explains.

Back with the fight.

As the conversation is happening in the observation room, Izutsuki uses his third arm with One for All to yank away Iida's staff before swiping his legs out from under him with the same weapon. He spins the staff in his extra hand before stabbing it into the ground, almost burying it a third the way up the staff. "Now, let's see if this idea works." Izutsuki says before his extra arm fuses back with his normal one. He lunges forwards, catching Momo by the collar of her leotard before his arm transforms into a tornado of energy. Momo tries to create a taser or something to break Izutsuki's grip on her costume as he dashes over to Iida and transforms his other arm into the same cyclone. He grabs Iida by the ankle before hoisting him into the air. The effects of Izuku's fusion quirk causes the two heroes to begin to glow bright white. Momo's body glows with a reddish light while Iida's is dark blue. "And presto change-o I now pronounce you, a brand new fusion!" Izutsuki declares as he claps his hands together forcing the glowing forms of Momo and Iida into each other.

The light from the two reluctant fusees swallows everything on the roof with a bright shade of purple. Izutsuki has backed off to enjoy the show as the new fusion manifests for the first time. As the light begins to dim, the fused fighter notices something different about this new fusion. The silhouette is obviously female but from what he can see is that she didn't end up getting the normal fusion metamoran outfit. "Hmm, I think the genie outfit might be unique to fusions with Deku. This certainly is an interesting development." Izutsuki says to himself as the light begins to fade. Across from him, is a brand new fused being, her long spiky black and dark blue hair take a similar pony tail to Momo's. The fusion wear's Iida's glasses without his helmet, and sports heterochromatic silver and blue eyes. Momo's leotard takes the forefront of the new costume they wear but it is white with armored portions similar to Iida's chest piece with blue accents along it. The exhaust pipes from Iida's hero suit frame her body with long slender legs ending in high heeled boots that have Iida's exhaust pipes. The fusion's body is far more muscular and taller than Momo originally was but it's evident that she is seemingly in control of the fusion.

"What... what happened to me... er you... us?" The fused woman says, and Izutsuki notices that the fusion's voice isn't doubled like his is, instead it's distinctly female, just a few degrees lower in pitch to Momo's own voice. "Are we..."

"Welcome to the world of fusion, it takes a little while to get used to but it's one hell of a power up." The doubled voice of Izutsuki says as he still arcs the power of One for All around himself. "Figured that since we fused, it'd only be fair for you two to become a fused warrior too."

"This is... this feels... strange." The fused woman says as she examines her hands. She looks around for a moment, trying to understand the world around her. "How come our clothes fused? You look completely different to us."

"I'm not quite sure myself, but time's ticking and you need a name if you're gonna be fused like that." Izutsuki says as he looks over the fused fighter in front of him. "I'm thinking, Tenmo. Tenmo Yaoyoroda. That feels like it works. So, care to get this show on the road?"

"We're supposed to be fighting here but..." Tenmo says as she tries to take a few steps forwards and then falls down. "I don't think I can walk like this."

"Right... Crap. I forgot about that, it takes a few minutes to figure out gross motor skills again. Well so much for my new worthy opponent." Izutsuki says as he quickly dashes forwards and wraps up the fusion woman in capture tape. "I was hoping that you two would figure it out quicker but I think we should get the rest of our classmates to practice fusing so this won't be a problem anymore."

"Hero team is incapacitated! Villains win!" The voice of All Might declares over the intercom.

"Well that was anticlimactic. Shame I didn't get to stretch my legs for once. Maybe I'll ask All Might for a sparring match later." Izutsuki says before untying the other fused fighter. "I can feel Izuku's starting to get a bit tired from being fused for so long, and for fusing two other people for the first time. So here." Izutsuki says before placing the edge of his pinkies on both hands on the fusion's nose and forcing his hands apart. This action splits the fusion apart, returning them back to Iida and Momo.

In the Observation room.

"So, who is the MVP of this match?" All Might asks, causing Todoroki and Ochako to raise their hands.

"Does Izutsuki count as the MVP here?" She asks.

"I think that title goes to Midoriya himself, since he was the one who fused with his ally and then used his quirk to fuse his opponents together which disoriented them enough for them to not be able to fight." Todoroki says.

"Yes, it would technically count for Izuku and the fusion Izutsuki as the MVP. While Izuku himself didn't do much aside from fusing with Katsuki, Izutsuki was far faster than anything his opponents could have dealt with. He even tried to level the playing field and make the match even for the hero team but accidentally disoriented the new fusion allowing them to be restrained." All Might says before walking over to the box. "The next match is Team C vs Team H. Once the first two teams return you may head down to the building." All Might says as Izutsuki defuses and then the two boys help Iida and Momo off the floor.