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Two sides of the same coin

Summary:

Mirdoriya Izuku is born with a quirk. The only problem with their quirk? It's not exactly useful in combat. Oh, and if Kaachan ever finds out, he'll never hear the end of it. Ever.

So maybe it's just better if everyone thinks he's Quirkless.

~OR~

Izuku gets born with a quirk that allows them to change sex at will and decides after years of struggling with their identity and hiding their quirk to join high school as a female. Hidden identities and hijinks ensue.

Chapter 1: Prologue

Notes:

So this was a crack idea that totally got away from me after seeing an old clip from the British superpowers TV show Misfits - in which at one point a male character gains the ability to turn into a girl. So sat there staring through my facebook feed I thought... 'what if Izuku had that quirk? What if they went to high school as a girl, but like, undercover to try and avoid being on such terrible terms with Bakugo? What would it be like, to experience life as a girl in high school from a newcomer's perspective?' and it was roughly at that stage that the crack idea evolved into this long, long piece of work about discovering yourself and female experiences, parenting and relationships.

(See the end of the chapter for more notes.)

Chapter Text

The first time they met Katsuki like...this... had been a total accident of fate. It'd been a beautiful, sunny day – the first such day of this new year. It had put them in a good mood, the first sight of the end of winter as spring came in. Their mother had recently bought them a yellow sun dress, shyly giving it to Izuku with the suggestion that they wear it sometime, if they felt like it. Izuku loved to feel the warmth of the sun on their skin on days like this so in a fit of courage left over from their latest (and sadly, last) counselling session with Dr Abe, decided to wear it out to the shop. Of course, if they went as a male wearing a dress there'd be funny looks, much though they didn't understand most people's preoccupation with 'male' and 'female' clothes. It didn't really matter to them though. Today was feeling like more of a female day. She felt more ‘she’ than ‘he’ today, though she was always a mix of both and neither. It would be the first time she’d gone out of the house like this, at least around the local area. On holidays their mother had taken them on down in Osaka, they’d sometimes been brave enough to head out in public like this, unafraid to be recognised when they knew nobody in whatever little town they were staying in for the holiday. But never back home, where they might run into someone they knew. Silly. You probably won't even see anyone, it's a five minute trip at most.

Her mother smiled brightly when she saw Izuku in the dress, cooing over how it fit really well and offering to let her borrow a small handbag of hers that'd go well with it that could carry the change for the shopping. Dresses after all didn't usually come with pockets; the main reason that Izuku didn't wear them more often. It was a nice bag though, a small brown leather bag with a long handle to loop over her shoulder. It was just about big enough for cash, keys and a phone and nothing else, really. She grabbed a pair of sneakers and debated taking her jacket in case the weather turned. Her mother soon solved the question by declaring that the dress was much too pretty to cover up, you'll only be five minutes Izuku. She didn't question the sneakers, well aware by now that they preferred comfort in their shoes over aesthetics - something they both agreed on, though her mother still squeezed herself into heels for parents meetings. 

She had a point, still the strappy top to the dress was a little more skin than Izuku was used to showing. But, she was nearly twelve now. She'd seen girls from school wearing dresses much shorter and with much lower necklines. Don’t be silly, Izuku She told herself. You’ll be starting Junior high in a few weeks. Stop being a baby, it’s just a cute, grown up dress. She still felt self-conscious as she dutifully called goodbye to her mother and said that yes, she'd go straight there and straight back and yes, she'd remember all three things on the list of essentials; no she did not need a written list. She left quickly before her mother could get worried about something else and try to send Izuku off with a bento or something 'just in case'. The local convenience store was less than five minutes from the apartment and she was there before she knew it, hardly getting time to feel self-conscious any time someone looked at her in the dress. Hardly.

They aren't looking at you, izuku. You're being silly. Remember what Dr Abe said. Most people are feeling too self conscious about themselves, or worrying about their own problems, to even notice how other people look in detail. So long as you aren’t wandering around dressed as a chicken, you probably won’t draw their attention at all. You’re just a face in a crowd.

She breezed through the store to the familiar isles for milk, rice, bread and eggs. Her mother hadn't asked for eggs, but Izuku had noticed they were running low on them. It took less than three minutes all told; the store wasn’t large and she knew from previous visits where everything was. So what happened next was like some colossal joke of the universe. Because as she left the store with a shopping bag in one hand, putting the change away into her handbag with the other, she slammed straight into Bakugo Katsuki. It was exactly like a scene out of a shoujo manga – if the manga’s genre was romance/horror.

"Watch it!" He grunted, though telling short of his usual expletive or growled 'deku'. She pulled up short in the doorway, gulping at the air like a fish out of water. Bakugo's face was blanker than she'd seen it in years, though a twitch near his mouth told her that his patience was thinning by the second.

"You gunna move or keep muttering?"

"Oh! I'm stood in the doorway, you can't get past-"

"For god's sake, move." He put her hand on her shoulder and pulled her forwards and then out to the side so he could get past, impolite but not overly rough with her. Her shoulder felt sticky when he let go. Nitro sweat. It was a hot day after all. It smelt a bit different to normal sweat too. "Weirdo." She heard him mutter to himself and that was enough to prompt her back to moving, taking big strides away from the corner shop and straight back home. 

Because Bakugo had been strangely decent to her when she didn't look like herself and she suddenly wanted to rip off this stupid pretty dress and burn it. 

Why did her quirk have to be so useless? Izuku lamented, thundering up the steps of her apartment block, only half caring that she might be breaking the eggs with her careless strides. Angry, sad tears welled up in her eyes before she swiped them away, hating herself for even crying over this. Why couldn't she breathe fire like her dad or have telekinesis like mom? Anything that could be used to be a hero, to stay favourable in kaachan's eyes. She brushed away half formed, bitter little tears. She was angry and sad and just so, so sick of how things had turned out. Because really, what the hell kinda good was having a quirk that made her able to change into a girl at will?

Notes:

Just a bit of housekeeping and FYI:

Disclaimer: I do not own boku no hero academia or the characters.

Anonymous commenting is off and comment moderation is on - just to prevent any hate speech worming its way into the comment section. If all that is in your comment is hate, then sorry mate but it's not going to be displayed on my piece of work.

I will try my best during the course of the work to be as close to canon as possible and to be as sensitive as possible around issues of gender and sexual identity, as well as descriptions of issues around mental health, specifically anxiety and self esteem. I'd welcome hearing feedback from those who have experienced any of those issues and who think I'm missing the mark in terms of realism, or I've over looked anything. Izuku's pronouns will swap a lot and there will be a lot of discussion around their identity and them dealing with both self-acceptance and getting brave enough to come out to others in 1A. The first few chapters will mainly flesh out the basics of the quirk and how they are able to attend UA as a girl without Bakugo knowing, before moving on to their experiences. The work will mainly centre around their experiences in the classroom as opposed to sticking to a detailed retelling of the plot and the villain fights. Future chapters' end notes will mainly contain explanations of any reasoning for canon deviations and characters being different (or why they behaved in a certain way), start notes will contain any trigger warnings so be sure to scan through them. Hope you enjoy!