Disclaimer: Of course I don't own My Hero Academia, its characters, or the franchise.
Story: When you're away from your Soulmate for a long time, it kind of drives you nuts, you know? So Izuku and Enji have been apart…and Enji doesn't take it so well. Cue his return and things turn a little strange.
Set as an AU canon divergent fic.
Spoilers: No, not really?
Warnings: Age disparity
Pairings: Izuku/Endeavor

Miss You Like Crazy
IV: Daughter

"Um, so just move the numbers here and line them up, and then…"

Izuku listened closely as Fuyumi explained the math problem to him, tapping his pencil against his notebook.

"Did you get that, Dad?" she asked.

He blinked before blushing, though he nodded vigorously.

"Thank you, Fuyumi," he said, trying not to think too much of the older female calling him 'Dad'. "I really appreciate it."

She smiled widely, blushing a bit. "It's okay! You're family now too, so of course I don't mind helping."

Izuku felt both warm and embarrassed at being called family, but he did grow uneasy.

"Hey, Fuyumi," he cautiously started. "Are you…are you really okay with me being your Dad's Soulmate?"

She blinked, surprised by his question. "Well, one, you're Dad. Father is Father," she giggled at his look. "Secondly, you two are Soulmates. Neither of you had a choice in the matter anyway. Why would anyone be upset at either of you two for something you can't control?"

He shrugged but was still hesitant. "True, but that doesn't change how you and your siblings feel. O-or Rei-san," he nibbled on his lip.

"True," she agreed, looking thoughtful. "But…Even if it was strange and concerning at first, because you're Shoto's age and his best friend, we also understood the concept of Soulmates and that it was rare in the first place. Plus…"

Izuku shot her an encouraging look and she suddenly smiled brightly at him.

"Plus you make Father really happy!"

Izuku's face blared hot and red and he was tempted to hide his face. He hadn't expected that from her at all.

"Before you, Father was always stern and cold with everyone, even his own family. Even if recently he tried to do his best to change that, he was having trouble. Then he met you and he was trying even harder, and sometimes it came a little easier to him even. And now, he's slowly able to be more expressive around us and talk and act more freely with his emotions, compared to before. Just this morning even! He made a bento for all of us," Fuyumi beamed at Izuku. "You really helped him a lot, even if he still has trouble expressing himself."

Izuku stuttered. "I-I'm really glad, Fuyumi."

But then she looked uneasy herself. "Um, it must be strange for you too, huh?"

He was taken aback, but reluctantly nodded. "Yeah, you could say that. I mean, Enji is older than me by a lot and I kinda worry if I'm too young or immature for him? And well, sometimes I think that he won't be attracted to me. I'm just a seventeen year old weird fanboy, and well…that too. I'm a boy. He was married to Rei-san before, so I don't know if he's okay being bonded to someone that's male too."

"He was uneasy about the age too," she revealed. "But it was more that he thought he was too old. He was surprised that he was bonded to a male, but he got over it pretty quickly. Anyway, what I meant to say after asking that is…you have step kids already. Me especially. I'm…twenty five. I know it's weird for you, right?"

Oh. Izuku looked her over and hadn't realized that even Fuyumi would feel insecure about this. It also kind of slipped his mind that being Soulmates with Enji wouldn't just affect the two of them. While he did realize on a basic level that it would, he didn't think about how they would feel insecure or worried about him accepting them. He just thought they'd be upset about this whole thing, about their father being Soulmates with Izuku, and how it'd affect their family and the strangeness of it all.

The fact that Fuyumi was worried he'd feel weird about her being his step daughter hadn't occurred to him at all.

He found himself reaching over and hugging her. She stiffened up before relaxing, and was then hugging him back tightly.

"Actually, I'm really happy to have you and the others as my kids!" he said, pulling away to look at her with a happy smile. "I always wanted a big family!"

Fuyumi looked extremely happy back at him and he hoped that she felt how sincere he was.

He didn't expect having a daughter at his age, but he didn't mind Fuyumi at all.

Fuyumi had been worried at first, when she found out her father had a Soulmate. Enji knew that. She was the worrying type, always worried about him, despite him never deserving it after everything in their family's past. And she definitely worried about her younger brother, given that Enji's Soulmate had ended up being Shoto's best friend. Natsuo had been explosive, being the angriest of them, and had shouted at Enji for a good hour or so. And Rei…

They had just started getting along and were working towards being amiable with each other again, like they once were in the beginning. She had even managed to start seeing him in person and was slowly not being afraid.

And then Enji had gotten a Soulmate and his family had been thrown back into a spiral, especially given who that Soulmate was.

But…that chaos hadn't really lasted long to his surprise. Izuku fit in like he'd always belonged, Enji'd never felt as happy and content with life as he now was, and his family gravitated towards Izuku like moths to a flame. Except instead of burning everyone like Enji felt he himself had, everyone was warmed and at peace with things.

Just like now as he watched his daughter laughing delightedly as Izuku animatedly talked about some of his and Shoto's adventures in UA.

It was the first time Enji had ever seen his daughter so relaxed and so expressively happy.

"Good evening," he announced his presence and the two looked over to him, still smiling.

"Good evening, Father," Fuyumi smiled widely, still basking in her good mood. She'd smiled at him before, but not like this.

"Good evening, Enji," his Soulmate adorably beamed at him and he unwittingly felt his lips twitch up.

"What are you two up to?" he asked as he walked into the living room.

"Fuyumi was sweet enough to help me with my math homework, while Shoto is at his work studies. Which reminds me, when I go to do my work studies tomorrow, should I say something to Hawks for you?" Izuku teased Enji's daughter.

"D-Dad!" Fuyumi blushed bright red.

Enji was pleased to see them getting along so well, even though he was still unsure about his kids calling Izuku 'Dad' and not scaring him off with the title. But Izuku didn't seem bothered by it now, so he let it go.

Though that thing about Hawks….

"Why don't you tell him he's not allowed to talk to her without talking to us first," Enji grumbled, picking up the tea pot they had set aside and pouring himself a cup.

"Not you too, Father!"

Izuku laughed while Fuyumi hid her face against her hands. Still, when Izuku went to go to the bathroom, he turned to his daughter.

"Is he really alright with you calling him that?"

Fuyumi looked at him in confusion. "What? You mean 'Dad'? He seemed fine with it," she said honestly.

Enji nodded uneasily, still not sure about it.

"I would assume so," she bit her lip. "Since when I asked if he was bothered by having me as a daughter, especially since I'm older than him, he told me he wasn't at all."

That surprised Enji a lot, seeing as he hadn't thought his daughter would feel that way. But that she was…

She pushed around a pencil on the table, keeping her eyes on it.

"I love you and you'll always be my Father, but…"

"You can say it, Fuyumi," he muttered.

Fuyumi finally looked at him again. "You were a horrible parent. But then so was Okaa-san, because all she saw in me was you. I tried to be happy and upbeat for the family, but it was really hard and I wasn't always happy either. Natsuo could easily avoid you or shout off, and Shoto just let himself be standoffish all the time, but I wanted to try to keep the family together and try to be a normal, hopefully happy family. It was…really hard," she ended on a whisper that made him wince.

She clasped her hands tightly together, and he could see how tight they became as her knuckles grew white.

"When Izuku came though, it finally felt like that could happen. And honestly…he's like my first, real parent," she looked down at her hands. "He even hugged me."

She rubbed at her eyes. "You've never done that. And I don't even remember when Okaa-san did, before she turned her back on me."

Enji felt guilt well up in him and he hesitantly moved towards his daughter, kneeling by her before he slowly moved to hug her.

"He is already a good Dad to you, isn't he?" Enji murmured, tightening his arms around her as she started crying more openly. "Much better than I ever was. I'm sorry, Fuyumi."

Enji once again thought just how lucky he was to have gotten Izuku as a Soulmate.

Started 11/23/18 — Completed 11/25/19

A/n: Welp. This was supposed a cute, fluffy thing with Fuyumi and Izuku…and then it turned out like this in the end (shrugs). Haha, oh well! They still had bonding time XD I hope you guys enjoyed it and please remember to feed my thirsty soul, heh! I love reviews~

Quick Points:

1. If you'd like to request something you want to see happen in this 'verse, you're welcome to suggest it. I only have a handful of ideas right now.

2. Current BNHA fics as of 11/28: "Advent of a Heroine" (main), "Don't Want to Touch You (But You're Under My Skin)" (Main EnDeku), "Miss You Like Crazy" (EnDeku Soulmate series), "Cake and Smiles" (AFOIzu, became a three-shot), an exclusive Ao3 EnDeku smut fic called "A Wolf in My Heart" (done for Kinktober), and a new EnDeku fic called "Miles in Your Mind". I also have an EnDeku recently published called "A Little Sugar & Honey" and a new EnDeku multi-shot called "Sweet Love O' Mine" that will hopefully come out tomorrow or Friday. Please check them out~