The Sweetheart quirk

by Wezko

Summary:

To give her baby boy more confidence, AFO’s daughter Inko gives him a special quirk. Instantly, her son sees sparks, and girls see it with him.

Izuku has a harem quirk and everyone is wild.

Chapter 1: Intro plus Ochako

If you asked Inko Midoriya, she would tell you her son Izuku was perfect. He was smart, handsome, kind, and passionate. Unfortunately, in a world where strength was measured in quirks, none of that mattered. Izuku had been born quirkless…until now.

 

“Izuku, I have to tell you a secret.” One day, Inko sat down in the kitchen with her son. “For your entire life, I kept a secret from you.”

 

“You’re a lesbian and are dating Mitsuki Bakugou.”

 

“That was a one-night thing, but no. This is about your grandfather.”

 

“…He’s racist?”

 

“Yes, but that’s not a secret. He practically invented Apartheid. Anyway! My father was a villain who could give and take quirks. I inherited a version of it where I can give one quirk I designed myself. Over the years, I created the perfect quirk for you.”

 

Izuku’s eyes lit up. “Super strength? Laser eyes? A magical girl transformation?!”

 

“I call it… Sweetheart.”

 

“…That sounds like a candy brand.”

 

“Once you have it, you’ll be able to find girls who will love you with their whole hearts.”

 

“…Is this brainwashing?”

 

“Not at all, sweetie. It’s just that girls will see a spark when they see you, nudging them into the right direction.”

 

“…And you’re sure this is consensual?”

 

“Yes, Izuku. You aren’t forcing girls to date you.”

 

“And why did you create a harem quirk instead of a more..hero one?”

 

“Because I’m really proud of you, but wish you had more confidence in yourself. And what gives teen boys more confidence than a harem. I would know, my father sold me as a slave to a friend of his, focusing me to join his harem.”

 

“Please stop talking.”

 

“That’s actually how I met your father. He was part of that harem too.”

 

“I’ll take the quirk, just please stop, mom.”

---

After deciding to still apply to UA despite having no useful quirk, Izuku went to the entrance exam..only to trip in front of the gate. But before he hit the ground, someone grabbed his hand, causing him to float.

 

“Are you alright? It would be bad luck if you..fell..” a brown haired girl said with a smile. But the moment their eyes met, it hit them both.

 

Ochako gasped, cheeks turning red as fireworks seemed to pop behind her eyes. Izuku felt the same dizzy rush, like he’d just inhaled pure oxygen.

 

“You…” Ochako whispered, not letting go of his hand. “Why do I feel like I’ve known you forever? Like…like if I let go, the world ends?”

 

“I-I think…this is Sweetheart.”

 

“S-Sweetheart? That’s so embarrassing!” Ochako's blush deepened, yet she was smiling. “I’m Ochako. And…I think I”-“ALRIGHT, LISTEN UP! ROBOT-SMASHING TIME, BABY!” Before Ochako could continue, Present Mic wanted to start his introduction.

 

“G-Guess we have to get going.” Izuku stammered, laughing awkwardly before walking away. “G-Good luck!”

 

As he ran away flustered, Ochako watched him leave her sight. “…His cute ass will be mine.”

---

The exam was chaotic. Robots everywhere, explosions echoing through the mock city, students sprinting around like caffeinated hamsters. Izuku ran forward, adrenaline pumping, trying to focus on smashing robots despite having a quirk that was basically designed for shoujo manga instead of combat.

 

But the whole time, he kept glancing around for Ochako. Sweetheart tugged at him, an invisible thread pulling his heart in her direction.

 

And then he saw it. Ochako was trapped under rubble, pinned down while the Zero-Pointer loomed over her like a skyscraper-sized middle finger to common sense and the national budget.

 

“OCHAKO!” Without thinking, Izuku ran towards her to try and lift the rubble off her leg. But it was too heavy..until it wasn’t. As he saw Ochsko in distress, his strength increased just enough to lift the rubble off Ochako and throw it at the Zero-pointer. “Ochako, are you okay?” 

 

“Y-Yeah… you saved me.” She nodded weakly, eyes shimmering. Relief immediately washed over him. Then, suddenly, Ochako lurched forward.

 

Ochako vomited violently, directly all over Izuku, leaving him dripping and Ochako mortified. “I-I’m so sorry!” Ochako squeaked, face redder than a fire hydrant. “I just, when I overuse my quirk I, oh my god this is the worst first impression ever!”

 

Izuku blinked, then started laughing. “It’s fine.” He said, smiling despite the bile soaking through his clothes and face. “Actually Ochako, would you maybe…want to go on a date with me sometime?”

 

“Y-You’re asking me out while covered in my puke?!” Ochako’s jaw dropped. 

 

“Yeah. Because Sweetheart doesn’t care about that. And neither do I.”

 

For a second, Ochako just stared. Then she laughed too, a bright, nervous, beautiful sound. “Yes! Yes, I’ll go out with you! Just…maybe we should get you a new shirt…and Mochi.”

 

“It’s a date..though can I quickly go brush my teeth too? Your vomit got in my mouth.”

 

“Keep this up and you might get something else of mine in your mouth.”

 

As Ochako wiggled her tongue between her fingers, Izuku had to admit that this was a great quirk….even if it currently made him smell faintly of acid reflux.

---

Pick Izu’s next girlfriend.

Notes:

This is basically 100 girlfriends who really love you. I’m starting school again so I wanted an easy, quick to upload story to add to my current roster, since all others are more characters driven with bigger stories.

Next girl, you guys decide. I’ll be doing that for every upload. So leave a comment. I’m not fully sure what to do with older characters like Mirko or Nagant. Same kind of goes for genderswapped characters.

Chapter 2: Mei

“Are you sure it’s fine?”

 

“Of course. I’ll gladly pay for some mochi if it makes you happy.”

 

After Izuku and Ochako found a bench outside the UA campus, Izuku bought his date a large portion of Mochi. And after telling her it was fine to eat as many sweets she liked, Ochako’s cheeks got stuffed like a chipmunk’s. Izuku meanwhile almost had a heart attack because of the cuteness the brunette was radiating.

 

“*munch munch munch munch*”

 

“Yes Ochako, for the last time, I don’t mind it. Take whatever you like.” 

 

Suddenly, a loud WHOOOM echoed across the courtyard. A cloud of smoke, sparks, and metal debris erupted just a few feet away.

 

“Ochako, look out!” Izuku instinctively dove forward, pushing Ochako to the ground so she wouldn’t get hurt..even if pushing her to the ground hurt her a little too. But before he could apologize a billion times more, he saw what came out of the smoke. It was a pink haired girl with dreadlocks and steampunk goggles. She was also riding a mechanical Bull looking robot. Only it destroyed everything around it with lasers, rockets and stomps. Still, she looked like she was having fun, even when the bull flung her through the air into incoming traffic. 

 

“Watch out, Crazy-girl!” Izuku cried out, running as fast as Sweetheart allowed him to catch the girl before he got turned into roadkill.

“I’m okay!” The girl shouted as he caught her. She then adjusted her goggles, and looked Izuku in the eyes. Immediately, she left a spark, just like Izuku felt.

 

“Are you fine?”

 

“…I’m Mei Hatsume! And you and I are going to make a whole lot of babies!”

 

Before Izuku could respond to her, Mei’s backpack grew four mechanical arms that grabbed Izuku. “Don’t worry, hamster-girl! I’ll bring him back after making babies..and maybe dinner!”

 

“*munch munch munch munch*!”

 

“I get that you two were on a date, but I’m sure we can share him!” Somehow Mei understood her, before running off with Izuku.

 

“OCHAKO!” He yelled as Mei climbed up an apartment building. “Help me!”

 

“Hold on, Izuku! I got this!” Ochako shot forward, using her gravity quirk to float up the building, dodging the robotic arms with flair. Almost like how planes used to fly past that giant Gorilla climbing the Empire State Building in the movie.

 

Finally, after a long drawn out fight, Ochako managed to make Mei’s arms smoke, free Izuku, and gently try to float him down to safety. But then Izuku grabbed Mei as well, once again protecting her from an exploding creation, pulling the backpack with mechanical arms off her back.

 

“Mei…that was…intense.” Izuku panted, adjusting his now very winded hair.

 

“I…uh…apologize,” Mei said, cheeks red behind her goggles. “Maybe…my love is a bit…overzealous?”

 

“Just don’t almost kill Izu again.” Ochako sighed with a glare.

 

And surprisingly Mei nodded, though she was also staring at Izuku with heart-shaped eyes. “I will behave…for now. But soon…we will revolutionize romance and science together! HAHAHA!!!”

 

Izuku glanced at Ochako, who sighed, smiling despite herself. “Well…that was…a date.” He muttered.

 

“Sure was.” She said, nibbling on another mochi piece she pulled out of nowhere. 

 

Between his Mochi loving girlfriend and the mechanical maniac that loves him a whole lot, Izuku knew this time at UA would be weird. Especially once both girls linked their arms around his, with Ochako glaring while Mei smiled. But both had a look that screamed competitive’.

---

Third gf

Notes:

A short comedy one because nearly all the actual emotional stuff fitted Melissa better.

I’ll probably do one more new gf before having a calmer chapter like them meeting Inko or doing something together.

Next girl, you guys decide. I’ll be doing that for every upload. So leave a comment and or do the poll. I removed Mei and added a couple new ones.

Chapter 3: Himiko

Izuku was already drowning. Not in schoolwork, not in hero training, but in romance.

 

Ochako wanted to spend afternoons eating sweets with him. Mei wanted him to ‘test’ her inventions, also known as ‘babies’, in her workshop. And both girls were very clear that they weren’t giving him up.

 

So Izuku sat at his desk with a notebook open, scribbling like he was preparing for a national exam. “Okay, so Mondays, Wednesdays, and Fridays I can see Ochako after class. Tuesdays, Thursdays and Saturday, Mei. And we’ll just have to rotate Sundays every week.”

 

“You’re really making a schedule for your girlfriends?” Ochako leaned over, munching a mochi.

 

“It’s the only way to make sure you both get the time you deserve!” Izuku proclaimed, as if announcing the most important fact of the galaxy. Both girls stared at him,  and their hearts squeezed with adoration.

 

Mei was sprawled across his bed, goggles pushed up on her forehead, tinkering with something that occasionally sparked. “Don’t stress, Zuku. Love is like engineering. Sometimes you need extra screws, sometimes you need extra lube.”

 

“MEI!” Izuku squeaked, face red.

 

Before Ochako could smack Mei with a pillow, the window suddenly burst open. A blonde blur launched itself into the room. It was a girl with messy blonde hair in a wrinkled school uniform. She landed squarely on Izuku’s lap and looked him straight in the eyes. Sparks exploded.

 

“…Another one already,” Izuku thought weakly, right before the girl wrapped around him like a koala.

 

“H-Hey, who are you?!” Ochako and Mei screamed in unison.

 

“Nyahaha~!” the girl purred, nuzzling his cheek like a cat. “You’re so warm! So perfect! So mine! I’m Himiko, and I love you, Izuku!”

 

Izuku’s face lit up crimson. The spark was undeniable. Sweetheart was tugging at his chest again, and he could feel her sincerity.

 

But before he could respond, Ochako and Mei tried to pull Himiko off him. Himiko looked at the two, and suddenly the lights in the room flickered out.

 

When they came back on, Ochako and Mei were gone.

 

“HIMIKO! What did you do?!” Izuku screamed, but Himiko just tilted her head innocently, still clinging to him. “Mrrr…don’t be mad, Zu. I just wanted you all to myself. Only for a little bit!”

 

“You kidnapped them?!” Izuku panicked, flailing. “Why do people keep getting kidnapped?! *sigh* I hope the next girlfriend won’t include abductions.”

 

“Okay..I’ll help you find them!” Himiko cheered, pressing her forehead against his. “It’ll be like a date! A cute little rescue mission, just us!”

 

Despite himself, Izuku’s heart skipped. Sweetheart was pulsing,  he really did feel it. She wasn’t lying. She loved him.

 

Still, he got on his feet. “Then come on! We have to get them back!”

---

They searched the neighborhood together. Himiko skipped at his side like it was a stroll through the park, while Izuku checked every alleyway, calling out for Ochako and Mei. But they were nowhere to be found…but then, when Izuku began to tear up for losing his girlfriends, Himiko sighed dramatically, tugging at his sleeve. “Okay, okay, fine. I’ll confess. I locked them in the supply closet.”

 

“HIMIKO!…That actually makes sense. I really should have checked there first.”

 

“I just wanted a little private time before I had to share you with those two. Sharing’s hard, Zu!” She whined, eyes watering just enough to stab his heart. “But…I guess that’s a bad girlfriend action, right? We all get to love you. And we all get your love.”

 

Izuku froze. She understood it, better than he expected. And even if she’d gone way too far…he couldn’t deny the warmth in his chest. “Thank you for understanding me, Himiko…now let’s hope that Mei and Ochako aren’t too mad.”

 

“Oh, I gave them something to enjoy themselves with. So they should be fine.”

 

“…Did you give them a vibrator?”

 

“Nope. Sometimes more..you.”

 

Something more ‘Izuku’. What could that even mean? We’re the girls reading his notebooks, or watching his baby photos?

 

As it turned out, neither. Because when Izuku opened the doors he was met by Ochako and Mei. Their wrists and ankles were taped together, as were their mouths. But the weirdest part…Himiko had taped his spare red shoes over their mouths and noses. And judging by the hearts in their eyes, the girls liked the smell.

 

“…I think I need a drink.” Izuku sighed as Himiko agreed, right before nimbling on Izuku’s arms.

 

This…was just Izuku’s life now.

---

Izuku’s fourth girlfriend

Notes:

This took so long..because I actually didn’t want ti do Himiko yet, and so was waiting for Kyoka to surpass her. But that didn’t happen, and I actually like the gimmick of you guys choosing the next girl.

Next chapter won’t have another kidnapping…I think.

Next girl, you guys decide. I’ll be doing that for every upload. So leave a comment and or do the poll.

Chapter 4: Momo

Izuku had faced many challenges in life. He was quirkless for a bit, got vomited on, kidnapped by his second girl. But nothing compared to his newest trial: buying gifts for three very different girlfriends. He scribbled notes furiously in his shopping planner, which was color-coded.

 

• Ochako: Mochi, obviously. Maybe something extra sweet.
• Mei: Tools or mechanical parts. Something she can use for her inventions/babies.
• Himiko: Cat plushie or a bag of blood Still pending research.

 

Clutching his allowance, Izuku steeled himself as he went to the mall.

---

He made his way into a fancy sweets shop, overwhelmed by rows of pastel-colored desserts. And that’s where he saw her.

 

A tall, elegant girl with dark hair tied in a ponytail, wearing a pristine dress that probably cost more than his entire wardrobe. She was staring at the mochi display like it contained the answers to life’s greatest mysteries.

 

More importantly though, he felt a spark once he saw her. But to see if it was mutual, he had to talk to her.

 

“Uh…excuse me?” Izuku gulped, causing the pretty girl to get startled and then composed herself instantly with a perfect, polite smile..That was, until she felt the spark too. “Oh! My apologies. I was simply…studying these sweets. I’ve never purchased…what is it called again?…‘strawberry mochi’ before.” The previously composed girl was now blushing like a schoolgirl..which she probably was.

 

“…You’ve never had mochi?” Izuku asked. 

 

She shook her head, embarrassed. “I was raised in a household where nutrition was carefully regulated. Most indulgences were…discouraged.”

 

Izuku’s heart twitched. This girl didn’t just need mochi, she needed Ochako-levels of Mochi in her life. “T-Try this one!” He stammered, grabbing two strawberry mochis and handing one to her. “It’s my girlfriend’s favorite!”

 

She hesitated, then bit into it. Her eyes widened like she’d just tasted heaven. “Oh…oh my goodness…this is divine.”

 

And just like that, Izuku knew the day would end with girlfriend number four. And the school year hadn’t even properly started yet.

---

Trying to ignore the warmth spreading in his chest, Izuku rushed to the hardware store next. He needed screws, wires, maybe some welding rods. But who was at the counter, frowning at a manual for a nail gun she clearly didn’t understand?

 

The same elegant girl.

 

“Oh! It’s you again.” She said, bowing slightly. “I…I confess, I don’t entirely know what I’m doing. But these do look useful.”

 

Izuku rubbed the back of his neck. “W-Well, I know what I’m looking for. My girlfriend’s an inventor. She’d love these.”

 

“You…you are so thoughtful. To know exactly what makes her happy…” Her eyes lit with interest. 

 

And once again, Izuku felt Sweetheart tugging at him. Harder, this time. So much so that he already knew the girl was named Momo…So that’s how Izuku immediately knew Himiko’s name in the last chapter…But how did Himiko know his name?

---

Trying to not think about Himiko stalking him, Izuku ducked into a plushie store. Rows of cats, rabbits, and questionable knock-off superheroes lined the shelves. So he grabbed the cutest cat plush he could find.

 

“Nyahaha~! Look at this one, Zu!” Himiko’s voice echoed in his head once he picked up a green kitty. So this has to be the right one.

 

But then, from the corner of his eye, Momo was holding a rabbit plush with the most serious expression in the world.

 

“…Are you following me?” Izuku blurted.

 

“N-No! I mean, yes! I mean, please don’t misunderstand! I simply…I found today’s outing to be refreshing, and coincidentally, you seem to appear wherever I go.” Momo gasped, mortified. “It’s almost like...I’m pulled towards you like a magnet.

 

Izuku blinked, then exhaled. “It’s my quirk. Sweetheart.”

 

“Sweetheart?” Momo asked, tilting her head.

 

And so, standing between a wall of pastel cats and rabbits, Izuku explained. The spark. The connection. And that he had three girlfriends already.

 

“I…I see. Then, that means…we’re…connected too.” Momo’s cheeks turned crimson. But then, her face went serious again. “But while your dedication to your girlfriends is admirable, it’s probably terrible for your bank account. So let me help you.”

 

Once Momo opened her wallet, Izuku looked inside and almost fainted.

 

• He had a relatively normal girlfriend in Ochako.
• He had a  genius one in Mei.
• He had a  wild one in Himiko.
• And now he had...a sugar mommy in the form of Momo.

---

By the time he returned to his house with bags in hand, Ochako, Mei, and Himiko somehow were there. Inko probably let them in, judging by the cups of tea they all had. Mochi, tools, and plushies were all distributed. And then, behind him, Momo walked in, clutching the rabbit plush like it was her lifeline.

 

“Everyone…this is…Yaoyorozu Momo,” Izuku stammered. “She’s, uh…one of us now.”

 

Ochako pouted. Mei raised an eyebrow. Himiko clung tighter to his arm.

 

“I know I may seem out of place, but please allow me to join you. I will devote myself fully to this relationship.” Momo bowed deeply, accidentally causing her to drop her wallet again.

 

As soon as Ochsko saw the wallet’s contents, she flew at Momo to hug her. And just like that, Momo was part of the family.

---

Next one

Notes:

I liked this one more than Mei and Himiko..but do feel like I should probably start having the girls actually interact.

Fun fact. A commenter asked how Izuku and Himiko knew each other last chapter, probably expecting an in universe reasoning…I probably just forgot it.

Next girl, you guys decide. I’ll be doing that for every upload. So leave a comment and or do the poll. I briefly removed Eri and added a couple more.