Deku uses hissatsu techniques from Inazuma Eleven.
Sorry if my descriptions aren't good enough, but you can find the moves on YouTube.
Hissatsu Deku
Eijiro was super pumped! He made it into UA, heck he made second place in the entrance exam! He was well on his way from graduating from his old self and becoming a Manly Man!
Speaking of, his new sensei was super Manly! Sure, threatening expulsion was pretty unManly by itself, but he had to respect that kind of no nonsense approach! Besides, Eijiro wasn't going to be last. He'd come too far to let it all end now.
Still, with guys like Bakugo in the running, things were going to be tough. That explosion was Manly as heck, but was shouting die like that Manly too? Eijiro wasn't sure, he was still kinda new to the whole Manly thing.
Speaking of, Bakugo was up next in the 50 meter dash. He was up against a nervous looking guy with green hair. He was cheering the kid on, he knew how that felt. But not anymore, because Eijiro was a Man!
The green dude kicked the ground with his toes a couple of times, stomped the ground and pushed his foot back as he bent down, splaying his fingers on the ground. Was he going to do a proper athlete dash thing? Manly!
Come to think of it, was he wearing soccer shoes?
Green Dude put his weight on his back foot and, just as the signal to start sounded, he pushed.
"ZEROYON!"
ゼロヨン
Leaving behind a tunnel of wind in his wake, Green Dude appeared at the other end of the track.
1.02 seconds. What a freaking Manly score!
Bakugo, finishing about 3 seconds later, glared at Green Dude. Eijiro was a bit worried about the guy's blood pressure. But then again, his passion was also super Manly.
"Damn Deku! Don't think your vague, bullshit quirk is better than mine!"
Vague? Seemed pretty clear to Eijiro. Super Speed is super Manly in his book. Way more flashy than his Hardening.
Deku - for lack of a better name - rubbed the back of his head. "A-Ah, well, let's both do our best, Kacchan."
Manly sportsmanship? Eijiro liked this guy already. Plus, childhood nickname? It took a real Man to use one. Most considered them to be too childish. How Manly!
Bakugo scoffed and walked away. On the one hand, super unManly, but also kinda Manly too. Gah, the world of Men is a rocky path to follow.
...He thinks that makes sense.
The grip test. Eijiro did pretty well, his Hardening let him put a bit more force into it, but it wasn't much compared to the 540kg that the big dude with six arms managed. Now there was a Man if he ever saw one!
Curious, Eijiro looked around to see how others were doing. His eyes caught Deku. He didn't think Super Speed would help him, but he was interested to see how he'd managed.
Huh, Deku was wearing soccer gloves now? Didn't goalkeepers wear those?
Bringing his hands up to his side, Eijiro's eyes went wide as they started to glow yellow. Deku clapped his hands together above his head, then brought them down to his chest, pressed flat against each other.
"MUGEN THE-"
Others were now gaping too as six hands appeared behind Deku, each the same yellow colour. Deku threw his hands to the side and then forwards, and the six hands reached out and slammed, one after the other, into the grip test machine.
"HAND!"
ムゲン・ザ・ハンド
Hands cupped like he was preparing a Kamehameha, Deku held the machine. Then, looking very sheepish, he realised that he'd broken it.
"..."
"..."
"I'll just put it down as infinity," Aizawa said, sounding very tired all of a sudden.
...Eijiro was feeling several things. First was confusion. The second was HOLY CRAP THAT WAS SUPER MANLY! The others were too muddled to make much sense of.
He was starting to get an idea on why Bakugo called Deku's quirk vague.
Standing long jump time, and everyone was looking at Deku to see what he'd do next. He looked pretty nervous at all the attention, but he didn't seem to let it get to him too much. Three guesses as to Eijiro's opinion on that.
Deku took several steps back and then ran forwards. "SKY WALK!"
スカイウォーク
Jumping up, several jaws dropped as he proceeded to walk on air! From foot to foot he stepped off of nothing, going all the way across the sandpit and then some.
For the first time, Eijiro noticed, despite his shock, that Deku's soccer shoes vanished once he landed.
...Eh?
Deku was up for the repeated side steps. Eijiro was hyped! He couldn't wait to see what crazy, Manly thing Deku would pull off next!
Taking a deep breath, Deku slid into a form and-
Stepped side to side, completely normally.
Eijiro fell over, practically slipping on the anti-climax. He somehow knew, without looking, that the rest of the class had joined him.
It was time for the ball throw, for real this time! Even with the crazy good, Manly scores that Deku had been getting, Infinity Girl had managed to match his grip test score with, well, infinity. Eijiro always knew that girls could be Manly too!
Deku stood in the centre with the ball. Once again, all eyes were on him. He placed the ball on the floor in front of him. Apparently they could all still be surprised by what he could do, because a soccer ball appeared around the smaller one. Deku's soccer shoes also appeared.
Deku kicked the ball up in the air then, with his heel, swung it behind him, sending it flying into the air. Landing with a back flip, Deku crouched down. Fire swirled around him in a circle, and the ring of fire followed his body as he jumped into the air. Deku spun as he went straight up, the fire spinning around him like a flaming tornado!
"FIIREEE TORNAAAAAAAAADO!"
ファイアトルネード
And, with a few more spins, Midoriya brought his flaming foot straight into the ball with a mid-air bicycle kick, the ball cutting a fiery path as it pierced through the sky.
Midoirya landed in a crouch. He turned around and saw everyone gaping at him again. He blushed and looked away.
A beep came from Aizawa's computer thing. "805.02 metres."
Woah! He beat Bakugo's score by a whole 100 meters! Manly as heck!
"DEKUUU!"
Apparently Bakugo had snapped, because he was charging at Midoriya, his palms blazing! Eijiro was shocked. Did his Manly passion burst free of its restraints? The blast caused an explosion of dirt, and Eijiro heard Aizawa curse as it got in his eyes.
Midoriya trembled, before a determined gleam entered his eyes. Raising a clench fist towards his shoulder, he swiped his hand, extending his fingers. Pink lines flew from his fingers and hung in place.
"HUNTER'S-"
He swiped his other hand and a second set of pink lines joined the first, forming a giant pink net!
"NET!"
ハンターズネット
Bakugo collided with the net, his body pushing into it. After a second of give, his body was bounced back and he fell on the floor in a flurry of limbs and curses.
Then, the net vanished. Midoriya looked surprised.
"Don't make me have to use my quirk," Aizawa demanded, rubbing his left eye. "I've got dry-eye." His hair, having been standing up, fell down in front of his face. "Bakugo, Midoriya, if you use your quirks outside of the tests again you're both expelled."
This caused Midoriya - which sounded nicer than Deku, to be honest - to start fanboying over their teacher, who was apparently the Pro Hero Eraserhead. Turns out he was an underground hero who struck from the shadows.
Eijiro...didn't think that sounded all that Manly. But Aizawa had a super Manly quirk that was amazing for a hero, so maybe Eijiro needed to rethink his stance on Manliness?
Once the day was over, Eijiro found himself leaving UA in high spirits. Aizawa-sensei had been lying when he said he was going to expel someone. As unManly as it was to lie, Eijiro was glad no one had to be kicked out.
Midoriya had ended up in second place, right behind Yaoyarozu who got amazing scores all around. For the last three tests, the green dude didn't use any of his crazy moves. Eijiro guessed even a quirk as crazy diverse as...whatever Midoriya's was had its limits.
Speaking of, Eijiro was pretty sure that Midoriya was right over there. "Hey, Midoriya!"
Midoriya jumped, and Eijiro just then noticed he was talking to two of their other classmates. Infinity Girl and Iida, who everyone had heard introduce himself. All three of them stopped as Eijiro approached them.
"Er, h-hello?" Midoriya said, the other two echoing the sentiment. "E-erm, sorry, I didn't catch your name?"
"Oh, right, I'm Kirishima Eijro, nice to meet you!"
"Greetings, Kirishima-kun! My name is Iida Tenya!"
"Uraraka Ochako, nice to you meet you too!"
"Oh, erm, I'm Midoriya Izuku...although you can call me Deku...if you like."
Eijiro noticed Uraraka beam at that, for some reason. "Nice to meet you all! And sure thing, I was kinda calling you that in my head anyway until I heard your name." Eijiro shook his head. "But anyway, I just wanted to say that I thought you were super Manly today! Your quirk is crazy!"
"Oh, yeah, that's right, Deku-kun! I wanted to ask you about it too!" Uraraka said, miming a punch. "I thought your quirk was that giant fist thing, but you really shocked me today!"
"Indeed, I too am curious to know more about your quirk!" Iida said, arms chopping away.
"Huh? Big fist?" Eijiro blinked.
"Yeah! Deku-kun saved me in the entrance exam, and that's where I first saw his quirk! He destroyed the zero pointer!"
Eijiro stared at Midoriya, a grin starting to split his features. "You destroyed that giant robot?! That's Manly as heck, dude!"
Uraraka nodded. "Yeah, it went like-"
Uraraka was trapped under some rubble, remnants of the rampage the zero pointer went on. She called for help, desperate to get out of this situation.
"Don't worry, I Am Here!"
Looking up from her position on the ground, Uraraka caught sight of a green haired boy with freckles. Raising one leg straight up, the boy then slammed it down and delivered a corkscrew punch to the air.
"FIST OF JUSTICE!"
正義の鉄拳
A giant, yellow fist appeared behind the boy's shoulder, and as his punch flew forward so did the yellow fist. It flew towards the zero pointer, spinning faster and faster as it went. It slammed into the zero pointers torso, drilling into the mechanical behemoth. After a couple of seconds, the zero pointer flew into the air and exploded above the city!
Uraraka gaped at the sight, then at the boy as he knelt down next to her, asking if she was alright. She nodded, dumbly.
"Woaaah! Fist of Justice sounds SUPER Manly!" Eijiro roared, hyped up by the mental tapestry Uraraka just weaved.
"Right! It was like All Might arrived or something!" Uraraka gushed, raising up an arm. "I Am Here! For a second I almost thought All Might really HAD arrived!"
Midoriya flushed. "I-I, n-no way, All Might is way cooler than I am!"
"I dunno, bro, that sounded pretty cool," Eijiro said. In fact, it sounded like the Manliest thing that ever did Man! Super Manly!
"I must concur! It was very, as you put it, Kirishima-san, cool," Iida said, pushing up his glasses. "In fact, remembering it makes me feel the need to apologize once more!"
And as Iida tried to make Midoriya accept his apologies, with Urakara and Eijiro laughing all the way, Eijiro felt that it was a perfect end to his first day at UA.
It was only after he got home, after seperating from the others at the train station, that Eijiro realised that Midoriya never actually explained his quirk.
Extra Scene
It was time for the ball throw, for real this time! Even with the crazy good, Manly scores that Deku had been getting, Infinity Girl had managed to match his grip test score with, well, infinity. Eijiro always knew that girls could be Manly too!
As Deku was handed the ball, he looked at it in thought. "Sensei, if it involves the use of my quirk, can I request someone else's assistance?"
Aizawa thought about it for a moment. Then, "Sure, whatever."
Deku ran over to Eijiro, much to his surprise. "Erm, could I ask for your assistance for a moment?"
Eijiro blinked. "Er, sure thing, dude!" It WAS pretty Manly to know when to ask for help. But why him of all people?
Deku grinned. "Great! Um, come with me, please!" Deku brought him over the the circle and stepped inside. "Could you use your quirk on your entire body, please?"
"Sure thing!"
Once sure Eijiro had done so, Deku surprised everyone, but Eijiro especially, when he reached down and grabbed him by the ankles, single-handedly. Eijiro yelped as Midoroya held him aloft, still with one hand.
A soccer ball appeared around the test ball, and Midoriya kicked it up into the air. Then, he swung Eijiro at the ball.
"DOKONJO BAT!"
ド根性バット
Eijiro was wide eyed as his hardened face slammed into the ball, sending it flying through the air. Midoriya put Eijiro down.
"Thanks for the help!"
"705.03 metres," Aizawa said, as if one of his students hadn't just used another as a baseball bat.
Eijiro blinked. "Er, no problem, bro."
How...Manly?
"Kirishima, I'll take that as your score, too."
Nevermind, it was Super Manly!