themightfenek

TG STORY - GIRLS DORM - MHA TG Act 1 | 2

Added 2025-03-03 21:33:50 +0000 UTC

This is the first 2 acts of a story that I will be posting along the month where the entire Class A gets TGed. The story is supposed to be "open ended" so more chapters can always be added! WHICH MAKES THIS SETTING GREAT FOR THIS MONTH'S SKETCH REQUEST.

DISCLAIMER: This story was originally commissioned and written in 2019, being completed in August. The manga had just reached the Paranormal Liberation Front arc. The writing may not reflect later revelations or developments in the series.

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-Act 1 Opening:

“Do I have to get good grades and be a good boy all the time to go to hero school?” A child asked.

“Of course! You should be the best boy or girl at all times!” Iida answered with enthusiasm, having dominated much of the Q&A so far.

‘Junior Heroes Day’ at UA was under way. Hero work was more than fighting and rescue jobs; community service and interacting with the public was a big part of the occupation as well. The freshman class was hosting a kindergarten class of kids from a nearby neighborhood. They gave tours of the school building and dorm explaining what daily life was like for a hero-in-training. They were currently giving an assembly on how to prepare for hero academies and adapting to your quirk. Presently they were holding a Q&A session for the kids.

“I can’t even be a little naughty?” The kid asked.

“Well you don’t need to be perfect. Why? Do you tend to get in trouble?” Deku asked the young boy.

“No but…” The kid pointed a finger at Bakugo in his hero costume on the other end of the panel, “He looks like the type of boy Mom says is up to no good.”

“Eh?” Bakugo turned his attention to the kid pointing at him.

“Mister, are you sure you didn't mean to go to villain school instead?” Another kid joined in with a sneer.

The explosive prodigy flared up. “What was that you little sh-MMPHH!” A tentacle of arms had reached over as Shoji manually censored Bakugo for the 10 year olds.

“Oh he might not look it but he does want to be a hero!” Mina piped up. She leaned forward and jokingly warned, “But you’re right! Dont become like him, he’s scarier than the villains!”

Bakugo was flailing around in anger as Shoji and Sero did their best to restrain him while Kirishima tried to calm him down. The kids were looking on in worried confusion until Bakugo was finally subdued.

The conversation rolled around to getting quirks. “When will I get my quirk? I ask Santa for mine every year, but I still don’t have it.” The kid clutched his hat, clearly expecting a certain answer.

“Well it could be at any time. Some of us got it when we were born, others were about your age. It might show up when you’re scared or excited. So keep checking every day and try lots of new things and eventually you’ll find yours!” Kaminari fielded this one with confidence. Deku looked like he wanted to add something, but decided against it.

“Ok… I’ll keep trying!” The kid excitedly pumped his fists, inspired by the heroes-in-training prompting most of the class to smile.

The afternoon rolled around and it was time for the kids to leave. After the kids had already walked off toward their school bus, Deku realized one of the kids had left behind their hat. The same one asking about his quirk from earlier. “Oh I better run this over to-“

“Give me that you damn nerd! I’ll take it to him.” Bakugo came from behind and snatched the hat, making Deku jump a bit. Before anyone could object, Bakugo launched across the campus with the hat in hand to return it to the child.

“What was that all about?” Kaminari asked, watching Bakugo shoot in the direction of the parking lot.

Tsuyu put a finger to her chin and after a moment concluded, “Maybe he was upset that the children didn’t think he was heroic. He’s taking them the hat to show he is a good guy?”

“Huh, guess there is a hero buried in there somewhere,” Sato chuckled. Everyone else agreed with Tsuyu’s assessment and started heading back to the dorm.

Meanwhile at the parking lot:

“AAAAAAAHHHHH!”

“HERE’S YOUR HAT YOU DUMB BRAT!!” Bakugo was launching himself at the kid who was fleeing in fear from the human missile as fast as his short legs could take him. Bakugo boosted ahead and landed in front of him. He pushed the hat into the kids hands. As he did the terrified child’s hands brushed against Bakugo and he felt a light electric shock. The kid looked surprised for a moment, forgetting his fear of the imposing student in front of him.

Bakugo however just assumed it was some built up static and started walking back toward his dorm and shouted “You’re Welcome!”, leaving the kids and teachers to silently wonder what his deal was. The kid with the hat flexed his hand a couple times; still in thought.

That evening at the dorm, everyone was hanging out in the common room. Aizawa had turned in for the night already, leaving class A to themselves. Bakugo was sitting with Kaminari and Kirishima. The discussion had turned to that day’s events, Bakugo’s impression on the kids in particular.

“Well Bakugo, you’re gonna be one hell of a role-model!” Kaminari laughed before Bakugo smacked him.

“Yeah I mean, I guess there are other scary heroes like Endeavor, so you can still make it far without being super friendly.” Kirishima tried to give it a positive spin.

Boom! Bakugo swung his fist at Kirishima, causing a small explosion that forced the redhead to fall backwards out of his chair. “I’m super friendly, asshole!” He angrily shouted.

While Bakugo chased his friends, everyone continued chatting about how cute the kids were or how hard teaching was.

“Hey Kirishima! Give me a hand.” Sato called out to his fleeing classmate as he exited the elevator. In his arms was a tray of homemade cupcakes. “Hand these out to everyone for me, I left my oven on.”

Kirishima slipped out of the chase and came over to Sato. “Wow, what are these for?”

“Eh, we can say it's a celebration for a job well done today… But really I just had some ingredients I needed to get rid of. Now come on, I gotta run back up.” He hurriedly traded the tray with Kirishima before heading back upstairs. Kirishima happily began handing out the treats while congratulating everyone with a ‘Good job!’ as he did so.

“Good job Bakugo!” He tried to cheer up his grumpy dorm-neighbor only to get a tongue click as a reply. “You didn’t kill Kaminari did you?” Kirishima had yet to give him his pastry.

Toru overheard and answered, “He said something about needing to give something back to TetsuTetsu in Class B before curfew started and ran off.”

“Well I’ll keep his for him I guess.”

As night began to settle on the UA campus everyone began to get ready for bed. Another exciting day in the life of superheroes-in-training awaited them the next morning.

-Act 2: Deku’s perspective

Deku woke up with a start. He could hear one of the other students yelling. He sat up and prepared to run for the door, but after only a couple steps he slipped and crashed into the floor.

“W-What’s going on?!” His center of gravity was off and moving his body was inexplicably awkward. He got to his feet to take stock of his situation. And then he saw his reflection. The source of the strange imbalance he felt was readily apparent from one glance at his chest. Two round mounds pushed against his shirt and he could see the edge of their curves pressed together above his collar.

He let out a cry of shock and embarrassment in a higher tone this time in unison with many other voices on the boy’s side of the dorm. All of them too preoccupied with their own ordeal to piece together the obvious…

An hour later Deku heard a knock at the door. He had been hiding under the covers of his bed hoping to either wake up from a dream or at least not be forced to look at his new cleavage.

“I-I’m busy!” He yelped quickly, trying to hide his new tone of voice.

“Deku? Are you okay? Aizawa is wondering why none of the guys are downstairs. He’s getting pretty mad.” Ochaco was standing outside.

Deku raced to think up an excuse that would satisfy her. He ran to the closet to find a jacket or something to hide his body. His lack of response however prompted her to walk in to see him and his new assets. There was silence for a few moments and then both blushed furiously.

“D-Don’t look!”

“W-Why… Boobs? Huh!?”

Deku attempted to hide his chest. But even without the boobs front and center, his slimmer frame and cuter face were apparent to Ochaco who just stood there confused. And the two stammered for a good couple of minutes.

Eventually they pulled themselves together. After a very awkward exchange of information, Deku got dressed and headed downstairs with Ochaco. He remembered the other cries he had heard before coming upon his own crisis. He was about to ask if everyone was okay when he saw another student descending the stairs. Deku and Kirishima made eye contact and slowly let their gaze move downward to each other’s chests. Confirming that their current predicament was shared, they blushed and looked away, the three proceeding down the stairs in silence.

Everyone gathered in the common room. Deku looked around and as he had begun to fear, the entire male population of the dorm was suffering similarly to him. Only some of them had developed noticeable breasts like Deku, but almost all of them had softer facial features and leaner builds. Some of them, like Iida and Mineta barely seemed changed thanks to their blocky and miniscule builds respectively. Only Iida’s longer hair and Mineta’s longer lashes clued people off to any change. Deku’s eyes inevitably moved to Bakugo who, like him, had a decent pair of breasts pushing against the jacket he had thrown on. A quick glare made Deku turn away. ‘Even with his more feminine features he was pretty scary… Maybe scarier.’ Deku thought to himself.

As if in defiance of that thought, some giggling and laughter began to break through the overwhelming awkward silence. “Pfft, Kirishima you’re so cute!” Jiro and Mina began teasing the redhead. He gave a half-hearted chuckle in response.

“Kaminari you barely look any different! You were already so girly looking!” Jiro began cracking up about Kaminari who had only had a slight change in his appearance, but could already pass as a girl.

“Wow Bakugo, you and Izuku seem especially affected by whatever this is.” Tsuyu voiced her thoughts on their bust sizes out loud, drawing most attention to their obvious growths outdoing the rest of the class.

“You wanna die, Frog?!” Bakugo snapped at her, making his shame obvious to everyone. Deku was nearing a meltdown of embarrassment when Aizawa finally walked out of his room and looked over everyone, silencing them. Many of them noticed he did not seem to be suffering from whatever the rest of the males were. Shoto stepped out with him; most of the class being taken aback by how pretty he had become. His face betrayed no emotion as usual; seeming to take this much less dramatically than the others.

“Well… I guess I can’t give you all detention for being late.” He sighed for a moment, unclear if he was annoyed at the situation or inability to dole out punishment, and continued. “Alright, well I’ve already called Recovery Girl about Shoto but I guess we’re going to have to have all of you checked out… What a hassle.”

Ochaco raised her hand and asked,“Excuse me sensei, why do we have to be checked? I’m pretty much the same as always. I think all the girls are.”

“Whatever this is could be spreading somehow. Two kids from Class B apparently called in with similar symptoms. Even if you aren't changing, you may be capable of transferring this. So sit here until Recovery Girl shows up.” Aizawa then retreated back to his room to make more calls.

Everyone had no choice but to take a seat. Many of the boys grabbed pillows or bags to hide their cleavage. Despite the seriousness of the situation, many of them, especially Mineta, couldn’t help but let their eyes wander. What changes did the others get? Who had changed the most? How cute were they? The mixture of emotions kept the group silent for some time. Until they heard the door open.

“Look at this sorry lot! The mighty Class A decimated! All of them looking not like heroes but sad little girls! Hahahahaha…” The constant laughter and mocking tone was obviously that of a certain Class B student. Everyone looked up to see Neito Monoma laughing away. On closer inspection though, he seemed to have a slimmer frame and altered facial features much like Class A.

“Idiot, don’t make fun of them when you’re in the same boat.” A white haired student walked in, smacking Neito on the head to stop his blathering. TetsuTetsu was clearly also under the effects of whatever this was, having a very similar, if not identical build, to Kirishima.

“You two also?” Sero asked.

“Yeah, looks like we got what you guys all have. Only us though, no one else in Class B seemed different. Boy it was embarrassing being the only ones in our dorms with this.” TetsuTetsu sighed.

Jiro and Mina turned around and snickered, “We’ve got plenty of teasing to go around if you’d like, cutie.”

The two class B students took a seat and right behind them was Recovery Girl. Some robots followed her and began setting up a makeshift office for her. “Well, now that we have everyone in one place, it's clear patient zero was one of the Class A students.”

“Then how did they get infected?” Ojiro asked, pointing to the two from the other class.

“Well, did you two come into contact with this class between yesterday and today?” TetsuTetsu put a hand to his head as did Kaminari.

“When I went over to give his video game back…” Kaminari lamented.

“Well, that makes sense, but what about Monoma?” Kirishima asked.

Everyone looked at Neito and in response he just gave a nervous laugh.

“When I walked into their dorm he shouted ‘Enemy invasion!’ and tackled me.” Kaminari explained.

“Well that at least confirms this is passed through physical contact. All of you come into the tent one at a time so we can get to the bottom of this.”

Boys entered one by one. Many of them left the tent looking ashamed or shaken about whatever went on behind the tent flaps. A few anxious minutes passed and Deku finally got his name called to go into the tent. Recovery Girl wasted no time checking his vitals and drew some blood for study. Then Recovery Girl hopped onto a stool and said “Now take your shirt off dear.”

Deku looked at her in shock. “W-What?”

“Ah every one of you! Your shirt! I need to examine your breasts, especially since you seem to have some of the biggest amongst your peers.” The unintentional compliment to his bust made him want to hide under something. “Hurry up, nothing I haven’t seen before. Well, never on a healthy young man, but you know what I mean.”

Deku reluctantly took off his shirt and let the old woman assess his breasts. A light squeeze elicited a shudder and a pinch of his nipple elicited a yelp. “Hmm, so just like the others, it isn’t just for show. So do you have any ideas as to how this happened? Come into contact with anything or anyone strange?”

“No Ma’am.” Deku answered, swiftly slipping his shirt back on.

“Alright dear, thank you. Call in young Bakugo for me.”

“Yes ma’am.”

Deku walked out and sent the next person in. He took a seat with the others who had finished, all of them silently dealing with the shame of their reactions.

Eventually everyone, including the girls and Aizawa, had been checked and they were instructed to stay in the dorm until Recovery Girl could go over all the results. Most of the boys returned to their rooms, wanting to deal with their embarrassment alone.

Deku sat on his bed unsure what to do for now. No one seemed to be in the mood to talk, leaving Deku alone with his thoughts. His busy mind kicked into gear, theorizing from every angle he had available. Unfortunately, even for a nerd like him, theories could only take him so far with no information. But he kept thinking, not because he thought he’d find an answer, but more so he wouldn't have to directly confront his own body. So he kept on thinking. How did this happen? Who in school has a quirk like this? Could it be a villain attack? How would this affect their quirks? How thorough would the changes be? Would he lose everything that made him male? How large would his chest get? As big as his mother’s? What color suited him best? How short a skirt was he willing to wear? Would more makeup help him stand out for guys?...

The thoughts had taken a strange turn, but before he could dwell on them he felt a presence nearby and turned to see a figure standing next to his bed. “Who are you?!” He shouted, pushing himself against the wall. He tried to start up One for All, but nothing happened. He took a closer look at the person in front of him. It was a young girl. She was exceptionally curvy and the strapless dress she was wearing showed that off quite well. Her small dainty hands had well manicured nails and her strappy heeled sandals showed her feet were the same. She had a small purse hung over her shoulder.

“Giggle You look so cute already. But wouldn’t it be better to go even further? Even girlier? Like me?” She puffed her messy dark locks with a hand and then started twirling some hair around her finger.

“N-No! Revert this right now! I’m not a girl! I’ll fight you if I-”

A spotlight fell down on the girl and everything else went black. For some reason, Deku only now could see her face clearly. It was his own. Longer lashes and green lipstick couldn’t hide that. She reached into her purse and produced a tube of lipstick, then with a gleeful expression began approaching Izuku to apply it. He tried to move, but found himself trapped in place as his doppelganger got closer. He tried to cry out, but found no voice to do it with. The cylinder of dark green brushed his lips-

Deku’s eyes opened. He sat up slowly and looked at himself… Still the same as he had been when going to sleep. The dream lingered in the back of his mind, while he tried to not ignore the increased sensitivity that washed over his body. As he rose out of bed he heard a knock at the door.

He and the rest of the dorm were called back to the common area to hear what the next steps were.

“Well dearies this is a rare case of a quirk that can produce a contagious virus.” Recovery girl began. “As far as we are aware, none of the students or faculty have quirks capable of anything like this. It’s going to take some time for us to determine where it came from. Since that’s all we know… We don’t know the full extent of the virus and how long it lasts. Because of that you’re all going to have to be quarantined to the dorm until we can be sure it isn’t still contagious.”

“How will you know?” Deku asked.

“Well Aizawa has already come into contact with you. Assuming he doesn’t transition himself within the next few days, we should at least be able to get you all back to classes while we figure out if this can be reversed.”

The ‘if’ at the end of the sentence hung over everyone’s heads. No one had even considered that this might be a permanent condition. Recovery Girl went through the procedures and rules they would have to follow during the quarantine. Basically it all boiled down to: