Chapter 1: Weak Heart, Strong Resolve

Izuku Yagi, is the son of the number one hero, All Might. Not that anyone knows.

Because his father is the number one hero, his existence, just like the relationship that his father has with his mother, Inko Yagi, is secret. He could have lived with that. He was doing that until he turned four and his quirk appeared.

His quirk, Operator, let him create an area where he can control everything. from his surroundings to people. But that wasn't the only thing that he was born with.

At the same age, they detected a cardiac insufficiency. He gets tired more easily, sometimes he feels weaker and his heart beats are irregular. And whenever he uses his quirk, that uses a lot of stamina, he feels worse.

He always wanted to be a hero. He always wanted to be just like his dad. But those dreams were crushed when he asked his dad.

"I don't think so, son." Toshinori Yagi said to Izuku as his grin slowly faded.

"What?"

"Your body is weak son. And I doubt it will get any stronger. I'm sorry." Izuku nodded slowly as tears came to his eyes "But hey! You can be another kind of hero! Maybe a doctor like your grandma Chiyo!" He said rubbing Izuku's head with his massive hand.

Not noticing his son crying.

*Hospital*

"Tell me sonny, why you want to be a doctor?" Chiyo Shuzenji asked to Izuku that was sat on a chair in the heroine office.

"Because I can't be a hero... and I want to help people." Chiyo blinked confused at that.

"Why you say that dear?" Chiyo asked as Izuku's tears started to escape.

"D-Dad said that I can't be a hero... b-because I am not strong and-and-"

"Shh, don't worry dear. I know you will be a great hero." The small eldery woman said as she hugged Izuku that sobbed in her shoulder.

"Y-You think so?"

Chiyo nodded with a smile "Yes. And I know the people that will help you for it."

She gave Izuku a candy and took went towards the pohone in her office and slowly pressed the buttons to call the two persons she had in mind.

*Next Day, Sorahiko's Appartment*

"Okay, what's the matter?" Sorahiko Torino AKA Gran Torino asked Chiyo as he received her and Mirai Sasaki AKA Sir Nighteye in his home.

Chiyo was sat in front of them both as she cleared her throat "It is about Izuku."

Mirai blinked "Is there something wrong with him? Toshinori told me about his condition."

"Yes." Chiyo said and Sorahiko eyes widened.

"What happened to the brat?!" He exclaimed thinking that he suffered a heart attack before he did.

"He wants to be a hero." Torino almost fell from his seat hearing that.

Mirai sighed in relief "And I thought it was something serious."

Chiyo bonked him on the head with her cane for the comment "The problem is, that Toshinori won't let him for the condition he told you about." She explained as Mirai rubbed his head.

Torino grumbled "And what do you expect us to do? Train him or-oh..." He stopped realizing where she was going with this meeting.

Chiyo nodded "Yes, I want you two to help me train him. I plan on teaching him medicine and you two can focus on the fighting stuff."

Torino smiled "It had been a while since I last taught someone... I'm in."

Mirai wasn't so sure "I don't know... I will see if it is a good idea, and if it is, I'll try to convince Toshinori."

Chiyo nodded smiling "That's more than enough sonny. Thank you."

*At the same time, Park*

Izuku was sat on a swing on the park as his mom was watching him. He was still sad about what his dad said, but what grandma say yesterday, gave him hope. He looked at his mom that smiled seeing an old friend of her. It was a blonde woman with a little girl with her.

Izuku went to see who it was and when Inko saw him smiled "... and this is my son, Izuku. Izuku, this is my friend Mitsuki Bakugou and her daughter Katsumi."

"Hi..." Izuku said and Mitsuki grinned.

"He's so cute!" She said passing a hand on his head and turned to Katsumi that was frowning "Say, want to play with Katsumi?" She asked and Izuku shrugged.

"I guess." He said and Katsumi huffed and went to the sandbox and Izuku followed her.

Once in the sandbox, Katsumi started to make sand castles with a frown, clearly not liking it. Something that Izuku noticed. "Hey, are you mad?"

"...Yes..." She said after a while "I want to play heroes and villains." She explained and Izuku nodded.

"Okay... want to play hero and villains with me?" He asked and Katsumi shook her head.

"No." Izuku frowned.

"Why not?"

"Because you won't like to play with me."

"Eh?" Izuku asked and Katsumi sighed like he was an idiot.

"My quirk is kind of dangerous. Look," She opened her palm and an explosion came out. She closed her eyes to expect him to run and scream, but instead...

"That's so cool!" She snapped her eyes open to see his eyes full of awe "Can you do it again!?"

Katsumi nodded dumbly as another explosion was created. When he asked for it again, she smiled.

After an hour of playing and talking, Katsumi grabbed Izuku's hand and dragged him where their parents are. "Something wrong?" Mitsuki asked and Inko looked at them with a smile.

Katsumi grinned "Mom! Can I marry Izuku!? Please?!"

Inko chuckled and Mitsuki laughed. Izuku blushed and rubbed the back of his head.

That's how Katsumi Bakugou and Izuku Midoriya became friends.

*Time Later, All Might's Hero Association*

"I think Izuku can be a hero." Toshinori blinked at the statement of his sidekick.

"Why you say that?" Mirai looked at the picture on the desk and smiled.

"Earlier, when I talked to him, I saw his future. He has potential to be a great hero. Maybe not a symbol like you, but a great one anyway." He explained and Toshinori nodded.

"I see..." Mirai smiled thinking that he saw reason "But I won't support him. And neither should you." Mirai frowned at those words.

"I think you're being irrational right now."

"No. I told you of his condition already, and even if your prediction is 100% flawless, I don't want to run the risk. I hope you understand." Toshinori explained his position.

"I understand from the perspective of a parent. But from the one that wishes to see promising new heroes, I can't understand." Mirai said and Toshinori sighed.

"One day you'll be a parent, and then you'll understand." Mirai nodded and walked to the door.

"I'll go finish your paperwork..." He said with his mind set.

Izuku Yagi will become a hero.

*Same Time, Hospital*

Izuku was reading from an anatomy book his grandma gave him. It was honestly; really fun. In the sense that it was interesting.

Besides, he was happy. He made a friend in Katsumi, found people that believe in him in Grandma Chiyo, Granpa Torino and Uncle Sasaki. The only down part is that his own parents don't.

But that doesn't matter! He will become a hero! A great one too!

Just wait and see.

Next Chapter: His Rebel Phase