My Hero Is My Dad?!

Summary: Izuku Midoriya only ever knew a couple of things about his father. He breathes fire and works overseas. But one of those things is a lie, and Izuku's life changes forever when his favorite hero of all time, All Might, suddenly returns to Japan from years of hero work in America for an unknown reason.

Disclaimer: Boku no Hero Academia/My Hero Academia is created by Kohei Horikoshi, definitely not me.

LES: This story is a Biological Dad AU where All Might is Izuku's father and Hisashi Midoriya does not exist. My idea is that while Toshinori was spending his time in America away from All For One, he made occasional trips back to Japan for various reasons. Usually to help with a major villain and then to go back to America. It was on one of these trips that he met Inko Midoriya. They were not in a real relationship. They were friendly with each other, but got drunk and slept with each other. The result was Izuku. When this story is turned into a series, the relationships that I am considering adding are Izuku/Ochacko, Todoroki/Momo, and possibly Kirishima/Ashido. NONE of these pairings are going to be in this first part if they bother anyone. The first part, and all of the parts, will mainly focus on Dad Might and Izuku because even they are my father/son OTP, and I largely consider the romantic ships to be secondary to this. We will also be getting Dadzawa and Shinsou eventually (Another father/son pairing).
As an author, I believe firmly in laying all of my pairings cards up front and center.
Oh, and one last thing... I promise. This story does have some violence, because I decided to go into All Might's first fight against All For One and the aftermath. If you've seen the show past the first episode, you will know that All Might got messed up from that fight really badly, and I spent so much time Googling various aspects of All Might's injuries that Google thinks I'm dying. But it's not perfect. In canon, it said that Toshinori lost "half of his respiratory system", but the total removal of one lung is a seriously major operation which is usually not even considered except for cases of extremely bad cancer because of the high fatality rate of the surgery. I don't really see a doctor okaying All Might for this surgery with the risks involved. Don't worry, his left lung is messed up, but not totally removed.
Sorry for the long author's note. Without any further ado, let's get going!

ACT I: CHILDHOOD

Chapter 1


It was a question that Inko Midoriya had been dreading for years. She had been keeping herself busy washing the dishes from dinner when she felt a light tug on her skirt. She looked down into the wide and innocent eyes of her precious four year old son. "Do you want something, little man?" Inko asked, quickly drying her hands off on her skirt and kneeling down to her son's level.

"Mommy, where's my daddy?" Izuku asked.

Inko's breath caught in her throat. Somehow, she knew that this question was coming. Now that Izuku was having more contact with other children, of course he would notice that most families were so-called 'nuclear' families. Thankfully, she had four years to think about this. From the time she had found out she was pregnant, she'd known that she couldn't tell her child the truth, at least for a very long time. She'd had a lot of time to think of a story. She opened her arms wide. "Come here." She said, and Izuku obediently jumped into his mother's arms. Inko stood up and carried the small boy over to the couch and sat down.

"So, you want to know about your father?" Inko asked.

"Yeah. All of the other kids always talk about their dads. But I don't know mine at all. Kacchan says that a father is a man who stays around moms all the time and help raise children. But we don't have any men around at all."

"Well, Kacchan is… sort of right." Inko said slowly. "But, sometimes, a father can't be around all the time. Sometimes they have to work far away to take care of their families." Inko reached over to the side table and pulled over an envelope. The envelope was a business envelope with the company information written in English and with an address in America. However, the delivery address was written by hand in both English and Japanese. The occasional envelope filled with American currency was the only contact that Inko had with Izuku's father since the day of his birth. "You see, he sends us money to support us."

And that was about the only thing Izuku's father could do. To be honest, it wasn't like she had any sort of real relationship with Yagi Toshinori, the man who fathered her son. They were friends, of a sort, that got drunk one night and had things go too far. Finding out that she was pregnant had caused the both of them a lot of stress. At first, he had made comments about marrying her and bringing her with him back to America. But Inko had been the one to turn him down.

Go to America? She didn't know if she wanted to pack up her whole life with a child on the way and move to a foreign land. Despite his assurances that he would take care of her, she knew no one in America and knew that she would be miserable there, especially since she couldn't say that she loved this man.

Neither one of them ever talked about the possibility of him staying in Japan. Inko didn't know why, but he never wanted to stay in Japan for more than a few days at a time. He only really came back to Japan when forced to by the public. So for reasons known only to him, it was out of the question.

So they had gone their separate ways. Inko had contacted him when his son was born, and Toshinori had started sending anonymous cash to Inko as unofficial child support.

"Does he not want to be around me?" Izuku asked, tears starting to form in his eyes.

"Oh, sweetie." Inko sighed. She could still remember the look on Izuku's father's face when he tried to propose to her for the sake of their child. For once, he had seemed scared out of his wits and without his famous smile, but his resolve had been firm. "He does want to know you. And you will get to know him. I promise you'll meet him someday."

"Extra-special promise?" Izuku asked.

"Extra-special promise." Inko agreed. Him being able to meet his father someday had always been in the agreement between Inko and Toshinori.


Over the years, Inko had been forced to come up with several other lies about Izuku's father. When she took Izuku to the doctor to find out why he hadn't developed a quirk yet, she couldn't very well tell the doctor the truth about Izuku's father's quirk. Mainly because she didn't know what his quirk was. No one knew what his quirk was for sure. But she knew that he did have a quirk, so she made one up that was completely unrelated to his abilities. Fire breathing was a fairly common quirk and no one would think twice about it.

If her son suddenly manifested his father's quirk, her lie would have blown up in her face. But she had all ready begun to suspect that her son was one of the few people to be born without a quirk.

That night, after Izuku had cried himself to sleep. Inko picked up her phone. After hesitating for about half an hour, she found the certain number in her address book and dialed it. She was not entirely familiar with the time difference between Japan and wherever Izuku's father was in America, but as near as she could figure it had to be sometime in the morning.

As she expected, it went to voice mail. "Hello again, Toshinori." Inko said softly so her son would not hear. "It's Inko, I..." At once, she began to regret calling him. What exactly did she expect him to do? Be disappointed? Come flying back to Japan? She knew he wouldn't. "I just found out that Izuku doesn't have a quirk. I'm sorry." And she quickly hung up.


(New York City, America)

It was well after midnight before All Might, real name Toshinori Yagi, could drag himself back into his penthouse. He almost walked past the answering machine on his way to the kitchen before he noticed that he had a missed call.

A little confused, since most of the people that he knew called him on his cell, he took a detour to the answering machine and playing the message. He was a little shocked when he heard the voice, since it was someone he hadn't heard from in years.

"Hello again, Toshinori." A female voice said in Japanese. "It's Inko. I..." There was a brief pause and Toshinori waited impatiently for the message to continue. Even though he'd had no contact with his son, not even a picture, the child was nearly always on his mind in someway. It took a couple of seconds for Inko to start speaking again. "I just found out that Izuku doesn't have a quirk. I'm sorry." And then the message ended.

To be honest, at first Toshinori was not incredibly surprised. After all, Inko could not know, but the boy's father was technically quirkless. One For All could only be passed on to another if the holder means for it to be passed on, and Toshinori did not mean for anything to be passed on that night with Inko, let alone his quirk.

A part of Toshinori was longing to get on the next plane to Tokyo, to meet his son for the first time, and to reassure him that being without a quirk was not as bad as it might seem. But the hero quickly decided that would do more harm than good. Being without a quirk in this superhuman world was hard, and pretending it wasn't was just a lie.

Toshinori couldn't help but feel sorry for the boy. If only he'd gotten his mother's quirk. Inko's quirk was not really that impressive, but if it had been passed on at all, there would have been the chance that the quirk would mutate in their child and become a stronger version of her slight telekinesis. Even still, having a weak quirk was seen as better than having no quirk at all.

Toshinori briefly considered calling back, but then he decided against it. What could he say? It was not like Inko would allow him to speak to his son. And even more, it wasn't like he could confess to either his son or Inko that he was the one responsible for his son being quirkless. Instead, he picked up the latest payment to Inko that he was planning to send in the morning. He opened the envelope again and added a short note along with the cash. "Everything will be fine. -YT"