She knew puberty would be weird, and a time of great change in her life, but there had to be some kind of a limit! Or maybe even just a general plan as to what the hell was supposed to be happening to her body. Sure, quirks might make things a bit complicated, but there was no reason that her quirk should be causing these things to happen to her! Probably. Maybe?

She should have paid more attention to biology.

Eiko stared at herself in the bathroom mirror and pushed her long black hair back, revealing those red roots that Mina had pointed out. Her hair really was just turning red. Not that she had a problem with red hair, her favorite hero had red hair after all, so the color wasn't the problem, it was because her body was just randomly deciding to have red hair now.

Hair color wasn't supposed to just randomly change like this! She ran her hands along the top of her head and stopped. There were nubs. Small little bumps on the top of her head. Did she have cancer? No that wasn't right, these things, they weren't squishy like her skin normally was, instead it almost felt like bone or something was growing out of her skin. That was only mildly terrifying. Still, they felt really hard.

She tried to lean forward to try and get a look at the nubs, it was awkward due to the angle of it all but she caught a glance of one of the nubs. Small, blackish red, and smooth barely rising out of her skull. How had she not noticed those when she showered? Was this some new kind of cancer? Maybe her quirk was going weird and making her insides harden? Was she going to die?

She took a breath and let it out. A small plume of fire came out of her mouth.

Oh. So she had a firebreath now.

That was cool.

But also what the fuck was happening to her?

First she grows like, two inches in less than two days. Her skirt barely fit over her butt, and her breasts had just decided to start growing again too! Not that she had a problem with being taller, but really! Heroes didn't need big tits! And hers were plenty big already! Oh man, why was this happening?

There had to be a link between everything that was happening to her. She just needed to think. What could have caused this? Maybe it was because she finally manned up and helped that green haired kid with his bully. What was his name again? "Izuku, right?"

Guh that wasn't important, there was no way that something like this would cause her to start growing again and-

Why was her boob glowing?

Unbuttoning her shirt she saw the signs that her breasts were indeed now too big for her current bra, but beyond that, sitting on top of her left breast where her heart was, was a glowing circle about the size of her palm, glowing with a pale blue light. Little symbols were glowing like a rainbow inside the larger circle. None of them looked anything like any character or language she knew.

"Wait." She blinked and tapped on her forehead. Wasn't that Izuku kid doing something with weird symbols when she stood up for him against his bullies. She opened her eyes and looked at the mark. "This is so his fault!"

"Who's fault?" Mina asked, as she slunk into the bathroom, a sly smile on her face. "Did you get a super secret boyfriend or something? Wait! What's that?"

Mina ran over and with zero sense of shame or personal space and touched the still glowing circle on Eiko's cleavage. "They make glow in the dark tattoos? You got a glow in the dark tattoo!?"

"Mina." Eiko said softly, looking at her friends hand currently resting on top of her cleavage. Honestly that little circle was really sensitive to being touched, not in a sexy way, but, just, sensitive. "You're touching my boob."

"I know! And they've gotten bigger! I guess we won't be trading bras anymore. But what's up?" Mina took a step back and gestured towards Eiko with both hands. "Like, even your ears are changing."

"My ears?" Eiko jumped and looked towards the mirror, her ears weren't that different, just, less round. "First, I'm growing taller-"

"And thicker!"

"Then I start growing horns, and now my ears are changing too?" Eiko let out a whine and another blast of fire came out of her mouth, mixing with the moisture on the mirror and fogging it up. "And that!"

"Wait, horns? Let me see." Mina grabbed onto Eiko's head and combed through her hair, "And don't breath fire on me."

She didn't even know how that happened in the first place. Still, she covered her mouth and breathed in through her nose. Seriously, why was she breathing fire now? That wasn't her quirk! Horns she could see just growing for whatever reason, maybe even as a part of her quirk, but fire breath? That just didn't make any sense! She didn't even like spicy food!

"Oh wow, yep, those are so totally going to be horns, they look like mine when mine were growing in. Only a lot thicker, and black instead of yellow." Mina let go over her head and smiled at her. "That means we're going to be horn buddies! Kya! I'm so excited for you. I hope your boyfriend likes them!"

"I don't have a boyfriend," Eiko stood to her full height, only an inch or taller than Mina, she had gone from kind of short for a girl to about average for a girl in a few days. Sure she'd always wanted to be taller - a lot taller - because it would be awesome, but she had assumed that she was done growing! She didn't have that cash to afford a new wardrobe out of nowhere.

"Oooh," Mina nudged her in the side as Eiko began to button up her shirt once again. It wasn't exactly tight around the chest, but apparently the extra height made it strain lengthwise and the slightest stretch could have her shirt untuck itself from her skirt. "Then who was the 'he' you mentioned."

"Just some boy."

"Some boy?"

She really should have phrased that better. A lot better. "Remember how I said I was going to try and be more like you and start standing up for people and not be so afraid?"

"Yeah! You were so cute when you made that promise, how could I forget! I even printed that selfie!" Mina gave her a wide smile her arms flailing about.

Great, now there was a picture of her crying somewhere on Mina's wall of memories.

"Well, I did that. I saw a guy, err, student, getting picked on while he was practicing his quirk so I stood up for him. The guy that was bullying him was a real jerk too, he had a super strong quirk. So, my rescue attempt didn't really go that well and we both ended up in the river. But, when I saw Izuku's quirk it had the same kind of symbols that my uhh-"

"Boob tattoo."

"Boob tattoo has. Only they were in the air, so I think, that maybe, all of this." She gestured towards her now red roots, pointed ears, obsidian horn nubs, and her body in general. "Is because of him. But maybe not on purpose."

"And your sharp teeth."

"Yeah. Wait, I've always had those."

"Oh yeah." Mina tapped her chin and smiled up at her. That was going to take some getting used to, but she also kind of liked it. "So, what are you going to do about it?"

"I think I'm going to go to the park after class and see if I can find him." Eiko tapped her chin and tried to visualize Izuku in her mind. He had messy green hair, even greener eyes, he was a bit on the skinny side, and he was tall. And he also had really pointy ears. "Ah-"

She could almost feel something, like, just a gut feeling of what direction he was in. But it was generic, just pulling her east. Was this because of the circle?

"That sounds fun! I'm coming too!" Mina jumped and pulled out her phone like it was a super move. "What park was it at? The one on your way home from school right?"

"Yeah, and wait, why are you coming?"

"To give you back up, duh! Consider me your pink emotional support alien!" Mina gave her a thumbs up and a wide smile that showed she was up to something. Eiko didn't know what that something was, but it was a general rule of thumb that if there was a guy and a girl that Mina was trying to set them up or silently routing for them.

"You're not going to try anything are you?"

Again, Mina just smiled tapping on her phone.

"Besides, if he's not there, we can go to Karaoke."

XXXX

The moment Eiko stepped into the park she knew where Izuku was. That vague direction she had felt earlier, was now just as clear as seeing him standing there in her vision. If not more so. Her head snapped to the right and she moved off the pathed trail, making a bee line right for him.

"Eiko?" Mina shouted. "Did you see him? Eiko! Dammit! If my tights tear I'm holding you responsible!"

Mina didn't wear tights, her sweat melted them.

"He's this way." She turned back and motioned for Mina to hurry up, then ducked under a low branch. She moved through the underbrush, trying to find a walkable trail along the thick vegetation until she arrived at a small rock filled opening. And there she saw him.

Izuku, the boy she had saved a few days ago, drawing symbols in the air with one hand and a notebook in the other. His sleeves and pants were rolled up, as he stood ankle deep in the water. Half entranced, half curious, she watched him frown, and attempted to draw a new symbol in the air, his pointer and index fingers leaving a glowing trail that lingered until he was finished.

The water in the stream rose up, in a bulbous sphere that shimmered in the air.

Izuku looked at his notebook and turned the page, nodding to himself and started to draw a new symbol. It lingered near the first, and then began to merge with it, their shared lights glowing brighter by the second. The sphere of water began to vanish. No, that wasn't quite right, it was still there, just instead of solid water, it was forming mist, and that mist began to thicken, until a dark angry cloud began to form around Izuku.

"Alright. Good." She heard him mutter as he turned a few more pages in his notebook.

He started another symbol. This one more jagged than the other two, after a moment that form began to waiver, the other two symbols rejecting it and then that dark angry cloud, exploded in a downpour of water, soaking the ground around Izuku. He just stood there for a moment, then sighed and marked it down in his notebook.

"Is he allowed to be practicing that here?" Mina whispered, making Eiko jump.

Which then caused Izuku to look at her.

Which caused her to jump again.

Which caused her to lose her footing.

Which caused her to tumble down the slope.

Showing off once again that she was incredibly graceful.

"Eiko?" She heard Izuku ask outloud followed by him splashing across the stream to come see her, his pants legs were now soaked. "Are you okay? And, um, what are you doing here? I umm. You look different."

He offered her a hand up and she took it without hesitation.

"Yeah she does!" Mina shouted, sliding down the slope with ease. "At least you noticed, now then, what did you do to her?"

"Huh? What?" Izuku flailed his arms the moment she was standing and took a step back, his cheeks were flushed and he looked genuinely confused. "I didn't do anything to her. At least not on purpose."

"A likely story, then why is it that your symbols are on her chest." Mina slapped the spot where the mark was, causing Eiko to let out a short squeal and cover her chest slightly. "Oh, sorry, forgot what that was."

"Wait really?" Izuku's eyes went wide and he turned back to his belongings on the other side of the creek. He drew a symbol in the air and they were pulled towards him with. That really was amazing. Just what was his quirk? "Can you show me? I know it might be selfish of me to ask, but if it is related to my quirk it might help me a lot in becoming a hero."

Show? But where it was. That place was. Eiko looked around the forest, and swallowed. She didn't want to do something like that out here of all places. "Sure." She muttered a small flame shot out of her mouth and made Izuku's blink back in shock. "Sorry, I don't have control over that yet. But, can we go someplace more private?"

"Uhh, sure?" Izuku shrugged.

"I know just the place!" Mina placed her hands on her hips and looked between them. "Man, I'm so not used to being the shortest person. Anyways, come on, and you're paying for this, twiggy!"

"Twiggy?" Izuku muttered looking at her.

Eiko shrugged, Izuku was on the skinny side, and he was really tall, but he was strong enough to pull her up easily enough. Though, how long would that last?

XXXX

She must be blushing up a storm. This was her first time going to Karaoke with a guy! Sure, Mina was there but that was only making things worse! It was like she was the third wheel, except they were a tricycle and Mina was the big wheel so she was deciding where they went! But it wasn't like she was dating Izuku. Sure she thought he was kind of cute, and nice, and kind of funny, but that didn't mean that she wanted to date him. She always thought that kind of stuff would happen after she became a hero and stuff.

Eiko breathed fire out of her nose and took a long sip of the fizzy cherry drink that she had ordered.

"So, Izuku," Mina leaned back on the single seat across from them a wry smile on her face as she took a sip of her own drink. "What exactly is your quirk?"

Izuku, who looked to be as freaked out as she was over the prospect of everything that was happening, not the least of which was that they were sitting on the almost too small couch inches away from each other in a very small room, swallowed and looked between the two of them. His face was likewise very red. "Well, it's umm, it's bullshit."

"Bullshit?"

"Bullshit."

"Dude, explain, we saw you do that water stuff. At the park." Mina leaned forward, her black eyes glaring at him.

"Sorry, I mean that's the best way to describe my quirk. It's magic bullshit." Izuku brought up his pointer and index finger and made a small symbol in the air that lingered for a moment, then he reached into his drink and pulled out an ordinary ice cube. It began to glow a rich blue color that bathed the room in its light. "I can draw symbols in the air, at first, that's all we thought it was, but, then I discovered that drawing certain symbols precisely, will make certain things happen. So, I've been practicing and trying to figure out new symbols so I can become a hero."

"You want to become a hero too?" Eiko muttered looking over at him. It made sense, that was why he was practicing his quirk. She should be doing the same when she got home if she was serious about being a hero too. Mina practiced hers a bit.

"Yeah," Izuku placed the ice cube back in his drink, it's blue glow slowly fading. "I want to be a hero like All Might, but right now I can't do much, and what I can do is a bit too slow, so I'm trying to find out new spells."

"Spells?" Mina asked, a wide smile on her face. "Oh! With how you hold your notebook and the way your quirk works, you're like a wizard! So of course they'd be spells for you. That's a super awesome quirk! I can spray acid everywhere, and Eiko can make herself hard."

"It's not breathing fire?" Izuku asked, his green eyes going wide as he stared at her. "Come to think of it, your skin did look sharper when you saved me a few days ago."

"No, the fire is new, I umm, actually think that you're to blame for that." Eiko took another sip of her drink before she got too worked up and started to breath fire again.

"Oh, umm, what exactly did I do?" Izuku leaned in close to her, those green eyes were sparking with curiosity, and just a bit of power. He was being really intense with this right now, she could see it in him, feel it in him. She liked that drive of his. Then he relaxed. "Sorry, I'm just, really eager to learn about my quirk so I can become a better hero."

"It's fine," Eiko took another sip and turned towards him, "It's just that after I helped you, I umm, started to grow, taller that is, and umm." She ran her and through her hair and pointed towards the red roots. "My hair's turning red. And I think I'm growing horns." She stopped at one of her nubs, then coughed. "And there's the whole fire breath thing."

"And her boob tattoo."

Eiko could feel the fire grow in the mouth. "And the boob tattoo, and I could kind of sense where you were earlier, so I think that, might be everything. I hope."

"Tattoo? Like with symbols and stuff?" Izuku looked more than a little excited. He reached for his bag, and pulled out a notebook and a pen. "Can I see it? Please?"

Was she really going to expose her chest to some guy she just met? She didn't want too, but, at the same time, he seemed really excited about it, and not all that interested in her breasts. Which kind of made her upset. Why did that make her upset? And it wasn't like she'd be showing anything more than she would with a swimsuit.

Oh god, what would her mother say if she saw her boob tattoo? And why was that its name now? This was why Mina shouldn't be allowed to name things.

Eiko let out a breath, the sound of a stove starting came to mind as a bit of fire came out of her mouth once more. Besides, if Izuku could understand it, he might be able to do something about it. "Fine."

She unbuttoned her top, button by button, almost painfully slow as she was aware of Mina leaning in.

"Oh." She heard Izuku mutter, his face now red. "When you said boob tattoo, you actually meant on your umm. Oh."

Well, at least now he was being bashful about it. Mina just stared at her with bedroom eyes that made Eiko question so many things about her friend. After a few more buttons, Eiko pulled her shirt to the side, giving Izuku a good look at the top of her bursting breasts. She turned away, her face red. "There. You, umm, you can look."

"Oh. I um. Oh. Wow."

"Pick your jaw up off the ground, twiggy."

"Oh. I um. Right. Could you hold still while I draw this?" Izuku scooted closer. His face so close she could grab it and shove his face in between her breasts. That was a weird thought. Why was she thinking weird thoughts? Oh. Because she could now breath fire, had horns growing out of her head, and there was probably a bunch of other changes too! This was all his fault.

"Can't you just take a picture or something?" She asked trying not to be aware of how close he was. She looked towards Mina, which was a mistake, as the things that girl was doing with her eyebrows deserved its own censor bar. She settled on closing her eyes.

"Do you want me to have a picture of your breasts?"

Fair point.

"Besides, my symbols don't show up on photo or film. So sorry, just please bear with it."

Why did he make it sound like that? It sounded lewd!

"Oh, I see."

"What's that?"

"Oh, well that symbol is one that I use a lot. It's for protection, if I use it baseline I'm kind of sturdy, but I can mix it with others to create a shield."

"Fancy, and that one."

"I have no idea."

"Really?"

"Really. I'll try drawing it later. I actually don't know a lot of these, but I'm going to experiment later."

"What happens if you explode?"

"I never said it was risk free."

Did they really have to be having a conversation like this while staring at her boobs?

"And done." Izuku closed his notebook with a snap and smiled at her. His blush returned when she looked at him. He looked kind of cute when he scratched the back of his head like that. "Sorry about that Eiko. And umm, thank you."

"No problem." She muttered, taking the time to button her shirt back up. "Just uhh, let me know what it does okay? And-"

She paused, turning to look at Izuku's shirt for a second. She could see a light coming from Izuku's chest, just barely through his own shirt. "I umm, think you might have one too."

"Hmm?" Izuku blinked and then looked down at his chest. He unbuttoned his shirt in a hurry, and pulled it to the side to show off what was a surprisingly muscular chest. Right over his heart was another uhh, boob tattoo, some of the symbols were different than hers. "Well that's new."

"Do you really have no idea what's going on?" Mina asked, leaning back into her seat. "Like its your quirk."

"Not really no." Izuku just smiled. "But I'm going to figure it out. Honestly, the fact that I can make something permanent like this has me really excited. I really can't wait to start experimenting with my quirk now."

"Oh, umm," Eiko pulled out her phone and pushed it towards Izuku. "Umm, could you give me your number? That way we can keep in touch?"

"Sure. That sounds great!" If she hadn't been stuttering just as much as he was, she might think it cute.

"You two are so adorable." Mina blurted out and grabbed the microphone. "Now then! We have like half an hour left so let's sing!"

When she got home that night, Eiko couldn't help but fall onto her bed and squeal. She finally had a boys number in her phone!

And while he was a little bit weird, he was also really nice.

But also strange.

But also cute.

AN: I saw acute (sexy) redheaded dragon lady and I wanted to write her, so here have this Elf Wizard Izuku x Dragon girl Eiko! *Cackles*