Author's Note:

Greetings!

Thank you so much for the favourites, follows, and reviews!

You don't know how grateful I am. I've never received so many reviews from just one chapter before. I'm really happy that you seem to enjoy this story and decide to stick with it even with my slow update. I promise I'll try my best to update faster for you.

Ideas come up at the strangest of time. Because of that I love to write extras and plots that are completely irrelevant to the main story. If you like, I'd like to make more extras in the future. But you'll prefer normal updates to this, won't you? LOL.

Anyway, happy reading!

Disclaimer: I do not own My Hero Academia.


The Eyes Flirt The Most

Extra #1

"What if Mikoto was Katsuki's sister?" AU


EXHIBIT A – SISTER


It was a sunny day out, which meant it was another day of being dragged by Katsuki to play with his friends. "Miko, you're always at home," he had said as he forced her out of bed, "As your big brother, I'll bring you outside!"

Raising a hand to hide her yawn, Bakugō Mikoto watched disinterestedly as they played in the sandbox from her spot under a tree. If only Mimi weren't on a family vacation then she would have someone to accompany her.

Hugging her legs, Mikoto rested her chin on her knees, about to fall asleep. There was never a fear in her to sleep in weird places because Katsuki seemed to have a Mikoto-radar. He somehow always knew where she was.

She was about to go to dreamland when she was disturbed by a loud cry. Peering an eye open in annoyance, Mikoto noticed that Katsuki had destroyed Izuku's sandcastle.

Again.

Feeling an incoming headache, Mikoto rose and made her way towards them before a fight could break out. "All right, what's happening here?"

"Miko-chan!"

"Uh-oh…"

"W-We didn't do anything!"

Katsuki's minions took steps back from the three figures left in the sandbox. Katsuki clicked his tongue, "I just fixed Deku's castle, is all."

Mikoto's amber eyes flickered briefly to the destroyed castle, "This is how you fix something?"

"Shut up! You didn't see how it looked! This is so much better!"

Mikoto sighed, "You're impossible." Crouching down, Mikoto picked the hand shovel up, "I'm sorry, Izuku. I'll help you rebuild your castle." She didn't see Katsuki's fists clenching and smoking.

"I-it's okay, Miko-chan!" Izuku blushed cutely, "I can build it again on my own."

"You don't want to build it together with me?"

"T-that's not it!"

"Then let's do it together," she smiled and ruffled his fluffy hair, "Let's make the best castle okay?"

Still blushing, Izuku giggled shyly, "Miko-chan really feels like a big sister."

"Hm?"

"N-Nothing!"

It was her turn to laugh. Ruffling his hair again, she told him, "Izuku also feels like a little brother," which caused him to turn even redder, "If you'd like to, you can call me 'Onē-chan' too."

"M-Miko-nē-cha—"

"SHE'S MY SISTER!"

The playground was silent except for Katsuki's laboured breaths. Mikoto blinked up at the blonde and her eyes widened. Katsuki was biting down on his trembling lip as tears gathered in his red eyes.

"She's my sister!" he repeated in a lower volume, "You don't have the right to call her your sister too!"

"S-sorry, Kaccha—"

"Shut up!" he lifted a hand to wipe his eyes. A sniffle escaped him. "Stay away from my sister!"

Mikoto sighed. "Really," handing the shovel to Izuku, Mikoto stood up and approached him, "You're impossible." She took out her handkerchief to clean his face. "This isn't something to cry about, is it?"

"Shut u-up!"

Once his face had been cleaned, she put her handkerchief back in her skirt pocket. Her hands reached out and took his clenched ones in them, "You're really a crybaby, aren't you, Onī-chan?"

"I'm not a crybaby!"

"Yes, yes." Her lips curled up when she felt Katsuki relax. His fists finally unclenched and he held on back to her smaller hands. "I am your sister. You don't have to be so jealous."

"I'm not jealous!"

"Yes, yes." Letting go of his left hand, Mikoto turned to Izuku, "Izuku, we'll be going home first. Sorry. I promise I'll build a castle together with you next time." Izuku nodded hesitantly, glancing between the two of them.

"You're not building a castle with Deku!"

"Yes, yes. Let's go home, Kacchan. Wanna watch All Might videos together?"

"…I'll watch."


EXHIBIT B – PICK UP ARTIST


"Hey, you alone?"

"Come hang out with us!"

Mikoto glanced up from her phone, her eyes meeting two unknown older males—pick up artists. She sighed inwardly. She was used to them, yes, but that didn't change the fact that they were really annoying. Worse, now really wasn't the best timing.

"I'm not alone," she replied dismissively.

"Aw, don't be so cold."

"Yeah, we just wanna hang out."

This time, her sigh was outward. "I said I'm not alone. If you know what's good for you, you'd leave."

One of them laughed, "You can't threaten us away. It's not every day we meet a high level cutie like you."

"C'mon, we'll show you a good time."

It was when one of the men grabbed her shoulder that crackles resounded—great timing, as always. "GET YOUR DIRTY HAND OFF OF HER!"

The hand was instantly gone as the owner was pushed away from her. "What the hell, dude?"

"Standing here like this, she's the one asking to be picked up."

"HAH? THE HELL DID YOU SAY, YOU SHITS?"

"Kacchan, watch your language. And don't spill my popcorns," going to his side, she grabbed the bucket of salted popcorns and her iced strawberry tea. "Let's go. We'll miss the movie."

"THE HECK I CAN JUST LEAVE!"

"Stop screaming."

"Don't order me around!" he snapped but his volume did lower.

"Tch," the man who had his hand on her shoulder turned around to leave, his buddy following him, "Lame. If you've got a boyfriend, don't act like you want to be picked up. What a bitch."

"WHAT DID YOU CALL HER? YOU DARE REPEAT THAT TO MY FACE?" And, he's shouting again. If Mikoto didn't have a nerve of steel—something she developed after being Katsuki's sister for years—she'd have shrivel and die from all the attention they were gathering. "AND SHE'S MY SISTER, YOU BLIND MOBS!"

"Wha—"

"Hey, isn't this guy dangerous?" They mumbled after seeing the sparks dancing on Katsuki's palms.

She grabbed his arm and tugged him away, "Kacchan, stop that. You know we aren't allowed to use our Quirk in public. Let's just go."

"LET GO—"

"Onī-chan!"

"Fine."

They were a few steps away from the pick up artists when one of them just had to open their mouth and asked, "Are they incestuous?"

"WHO ARE YOU CALLING INCESTUOUS, BASTARDS!"

BOOM!

Mikoto sighed. "Now I have to apologize again..."


EXHIBIT C – DOTING


"Oh, Bakugō, that smells good!"

"Is that curry? That pork cutlet looks so good…"

Eijirō and Mina came bounding over at the delicious smell wafting through the air. Mikoto chuckled at how the two were almost drooling at the sight of the food that Katsuki placed in front of her—curry rice with pork cutlet, spinach and mushroom salad with honey mustard dressing, and homemade strawberry milk.

"Looks good, right?" she bragged. When one looked at Katsuki, they wouldn't think he was this good at cooking. But due to his experience with being forced to help around the kitchen by Mitsuki, he picked up the skill. Not to mention, he had a talent to be good at everything. "Kacchan's cooking is really good."

"'Course it is." the blonde said briskly, sitting down across from her with his own food.

"B-Bakugō, don't you have any leftover?" Mina asked pitifully, "You should share!"

"Of course there's none! Go make your own food!"

"Don't be so stingy, Bakugō! Sharing is caring!" Kirishima joined in the begging.

Letting Katsuki take care of the chaos, Mikoto quietly ate her dinner. As usual, Katsuki's cooking was downright heavenly.

"That colour," Tsuyu's voice came from her side, "That's the sweet kind right? I didn't imagine Bakugō-chan to be the type to enjoy sweet curry—" her words were cut when she turned around to witness Katsuki adding half a bottle of hot sauce and black pepper into his curry. "Bakugō-chan, that much spiciness can't be healthy for you."

"Shut up." He mixed his curry, turning it into an unbelievably dark colour. Tsuyu and the other two turned visibly green.

"Mikoto-chan," Kirishima spoke up nervously, "Shouldn't you stop him?"

Mikoto blinked, confused, "Why?"

"I'm not a gourmet but even I know that's not how you eat curry." Mina blanched, "Ugh, watching Bakugō makes me queasy." She said, rubbing her chest.

"Mind your own business! Nobody asks you to watch, Raccoon Eyes!"

"It's all right, Eijirō. Kacchan's stomach is really strong. He doesn't like the sweet kind of curry anyway."

"Eh? Then why did he—"

"For Mikoto-chan, right? Really, Bakugō-chan is such a doting brother."

"HAH? WHAT WAS THAT?"

Mikoto smiled, tasting the sweetness of the curry. It was just like how she liked it. He didn't use kale, peas or bell peppers in the salad because he knew she didn't like them. Instead he used the mushroom and honey mustard dressing that she liked. Plus, of course, there was her favourite strawberry milk that he made himself the day before.

As much as he tried to deny it, he really was a doting brother.


EXHIBIT D – PAMPERING


"Bakugō-kun, your skin is really pretty, isn't it?" Ochako asked, her head tilted, staring curiously at Katsuki.

"Yeah, it's flawless." Kyōka agreed.

Mina added, "Bakugō's hair looks all spiky but I heard that it's actually really soft too."

"If you don't mind, could you share with us your beauty secrets, Bakugō-san?" Momo inquired, as polite as she ever was.

"Do I look like I have beauty secrets, you extras? Go away!"

"Geez, no need to be so rude, Bakugō-kun! We're just curious!" Tōru huffed.

"This is the reason why you aren't very popular, Bakugō-chan."

"Shut up! The hell the lot of you crowding me in the first place for!"

"We just want to know how you got your pretty skin and hair!" Ochako retorted.

"How would I know—"

"Kacchan!" All turned to see Mikoto approaching them, a package in her hands. "The sheet masks I ordered just arrived. Let's use these together. It's been a while since your last hair treatment too. Now is just as good time as any. I just got this really expensive hair mask so let's use that too." She rambled, excited at the prospect of self-pampering after days of training.

"As if I would—"

"Yes, yes, let's go!" she pulled him up from the couch, smiling, "I'll make you all pretty, okay~"

"I don't wanna be fucking pretty!"

"Now, now, there's nothing wrong with being pretty. It shows great self-care. And watch your language." Despite the tantrum and explosions, she continued pulling him with her. She stopped when a familiar figure descended down the stairs, "Izuku, good morning."

"M-Miko-chan, good morning!" Izuku greeted with stutters, flustered. Hesitantly, he turned to his childhood friend, "Good morning, K-Kacchan…"

"DON'T TALK TO ME IN THE MORNING, YOU SHITTY NERD!"

"Sorry!"

"Kacchan, stop bullying Izuku." Mikoto scolded. Smiling at the greenhead, Mikoto asked, "Do you have any plans for the day, Izuku?"

"Eh, n-not really…"

"Then let's the three of us spend the day together. It'll be just like the good old days."

"HAH?"

"EH?"

"Now I'm excited!" Mikoto chuckled, "Sheet masks, hair masks, aromatherapy, cuticle care… Now that I look at it, your brows are growing messy too. I'll thread them for you so let's spend the day relaxing together, okay?"

"T-Threading?" Izuku gulped, flushing, "D-Does that mean I'll have to lay my head on your—I mean—"

"AS IF! I'D RATHER DIE THAN SPEND THE DAY WITH DEKU!"

"Kacchan, y-you shouldn't say things like that…"

"HAH?"

"All right, stop complaining now. We're going to relax together no matter what. Let's go!"

And despite Katsuki's shouting and Izuku's trembling, Mikoto successfully brought the two to her room for a much needed day of relaxation and self-pampering.

The girls watched the unfolding scene with awe. "I understand the special treatment," Ochako began, "But to be able to make Bakugō-kun and Deku-kun spend the day together…"

"She's amazing, that Mikoto!" Mina exclaimed in awe.

"But now we know Bakugō's beauty secrets." Kyōka sighed, "I guess he has his own beauty specialist."

Momo nodded in agreement. "Mikoto-san is very well versed in the beauty department…"

"I wonder if Mikoto-chan will share her beauty secrets with me…"

"You should ask her, Tōru-chan. It's Mikoto-chan so I'm sure she'll share." Tsuyu noted.

Meanwhile, in the bedroom…

"Hurts! Miko, stop that!" Katsuki complained, twitching, his hair tickling her thighs.

Mikoto's eyes narrowed. In a way, he just offended her threading skill. "Stay still! It hurts because you keep twitching!" she turned to Izuku with a kind smile, noticing how he was fidgeting, his face flushed, "Ah, Izuku, you don't have to be that scared. I'm skilled at this so it won't hurt. I've done it for you before, haven't I?"

"Y-Yes!"

"What's wrong?" she blinked.

"N-Nothing!" he looked away, "J-Just… D-Do I also n-n-need to—"

"Need to?"

"I-i-it's nothing, after all!"

"Oi, Miko, are you finished or what!"

That switched her attention back to Katsuki, "Hardly. I can't work fast because you keep moving around. Stay still this time." What she said next made both boys froze, "I still have to trim your underarm, arms and legs next. After that, I'll clean your ears and nails. We have a long way before we can get to the good part!"

And the screaming began yet again.


AU Ends


I have naturally neat and thick brows so I never really take care of them but my friends who thread say that it's a painful experience. Poor boys. Mikoto is also used to bodily hair from Lilith's days as a beautician so we can count on her to keep the boys pretty. Personally, I find body hair unpleasant because I think it's unhygienic and it induce body odour.

If you're wondering why Mikoto is Katsuki's little sister, it's because her birthday is in June while Katsuki's in April. I have a headcanon that if Katsuki has a sibling, he'd be a very doting one. I also have the headcanon that if Izuku weren't Mikoto's sister in the main story, he'd have a puppy crush on her. I believe you know why.

All right, that's it. Hope you enjoyed it. Leave me lots of love, please!