Hi there everyone so, this is my first attempt at a fan fiction and I had the Idea myself for a while of Izuku having a quirk like this (no spoilers as to what it is you just have to read to find out) and what would happen when it manifested I hope this goes well but as I said this is my first time writing a fanfiction so please review and tell me honestly what you think about it and if you have any criticisms please tell me how you think I could fix the problem. Anyway I hope you enjoy.
"Normal talk"
"Loud booming talk"
"Thoughts being shouted"
"Normal thoughts"
Not all men are born equal, that is what Izuku learned at a young age but he more importantly learned that with any great power there is a price, a curse you could say in his case. Izuku was hyped for his quirk to manifest, the doctors told him that his quirk would be part emitter so he knows his single audio jack receiver earlobe wasn't all there was to it. He had just gotten home and his best friend had manifested their quirk, explosion, the ability to fire off explosion from his palms at will there were so many applications for his quirk he would surely become one of the best heroes there is, only second to All Might the unsurmountable, the unbeatable, the man who can win any fight with a smile. Izuku was going to listen to some music from his father's MP3 player and think about what his quirk might be ,the ancient device was incompatible with any speakers these days but Izuku had found out that the auxiliary cable for it was able to work with his earlobe and allowed him to listen to any song as loud or quiet as he wanted without damaging his hearing so when he had found out the songs were so much better than the quirk made songs of today he would only listen to songs from the Pre-quirk era when there was so much creativity with song making in his opinion. He connected to the MP3 player and decided to listen to a favourite song of his, Unstoppable by the band The Score, and then he lost consciousness and his body was surrounded by lights swirling and pulsing, when they stopped what stood in his place was a full grown man dressed in a full body suit with amour padding the man's eyes were a neon green as was his hair and on his left hand wrist was a watch that had a touchscreen interface showing the MP3 player screen the first thing the man did was activate the constant replay button for one song the man opened the window to Izuku's room and leapt out into the night.
Meanwhile elsewhere in Hosu
BOOM!
Vlad King was thrown to the side of the street by the Villains bomb that had popped out of his hands, Vlad was extremely beaten up his suit in tatters but the hero got back up and charged back in throwing a spear of blood at the villain but this fiend was just too fast for Vlad and was almost certainly going to get him killed if backup didn't arrive in time and that was seeming unlikely with how many other villains were attacking around the city. He believed that this was one of the organised underworlds last desperate attempt to keep their power by attacking an entire city to destroy it before the symbol of peace could show up and for a desperate attempt they were doing excellently having badly injured Loads of pros and cutting off all communications outside the city. He was just thankful they didn't have a nuke or enough explosive to blow the city sky high.
He jumped up to dodge a bomb thrown low from what he could see the bomb villain needed to wait a minute between making bombs and they blew up from any level of force exerted on them so it was a matter of being far from the bombs landing points. He rushed the villain hoping to knock him out before he could throw another bomb but, then he noticed it the villain had a submachine gun under his cloak and he was raising it up to Vlad's face.
"So this is it this is where I die then if I'm going to die I'll take him with me so no-one else has to die at his hands." Where his last thoughts before the green stripe punched the bullets back into the gun, wait, what! Vlad looked at the man who had just shown up and knocked out the villain by using the man's bullets to blow up his gun and knock him out cold, the man looked at him and picked the man up and ran to the nearest hospital put him down on an empty stretcher and ran off into the chaos of the city and back dropping off other heroes and villains that were knocked out and tied up. In five minutes the entire city was silent and the last villain was at the hospital everyone was too dumbstruck at the man's efficiency that they were all still outside the hospital when he got back.
Crack!
A massive hulking man about twice the size of All Might landed and stared at the Green haired man. "So you're the reason we were all taken out so fast, well don't expect me to be as easy I can go toe to toe with All Might so I suggest you run before I splatter you all over the street in one punch!" As the large man walked forward all the mysterious man did was stare at him and put up his fist with a smirk on his face, this clearly pissed off the man so much that he just straight up charged at him and punched him the sheer air force from the punch destroyed four buildings behind the green saviour. Everyone was frozen in fear this man could probably go toe to toe with All Might and they had so much fear for the poor soul who had stopped the punch with his face and break the guys arm with it! The guys arm was completely dishevelled and bleeding the green guy reached up and flicked the guy on the nose and the man was sent 5 meters back and was unconscious. Vlad didn't know who this man was but when he next met him he would personally thank him for saving all of their lives but the guy had run off after binding the man so he couldn't move.
"Well then I guess you might be a vigilante with how you avoided looking at any of us and ran off you green god like neon sign." Were Vlad's last words before he fainted.