Chapter 1: Debt

"Is it done yet?" The boss of the yakuza organization, Shie Hassaikai, asked Chisaki Kai that nodded.

"Hisashi Midoriya is gone now with his wife." He explained and the boss nodded.

"I thought he had a son too."

"He does. Izuku is his name. He is in school right now." Chisaki explained and the boss nodded and hummed.

"Go and pick him up. I want to talk to him." Chisaki raised a brow but didn't ask why. He just nodded and went on his way.

*Later that day*

Chisaki got out of the car and was walking towards the school to pick up the brat. He tried to avoid the kids that were running around school grounds. He was thankful he was wearing his medical gloves, medical mask and long sleeves.

As he was walking towards the playground, he had memories of his own childhood. A similar sandy playground, with quite a lot of games and kids laughing. He couldn't help to smile slightly. Until an explosion called his attention.

He raised a brow as he walked to the explosion. He heard laughs and saw some kids calling another one 'useless' and 'deku'.

He saw that the kid had green hair, telling him he was Izuku, and was standing up to the blonde one tormenting him. He noticed some bruises on his face and the blonde brat was going to punch him again and was impressed he didn't flinch until the fist hit his face sending him to the ground, falling on his butt.

The blonde laughed loudly and was going to punch him again, when the shadow of Chisaki stopped him. He and his two cronies turned around to see him. "Beat it."

The blonde brat gulped before running away with his cronies. He stared at Izuku that stared back at him. "Can I help you sir?"

Chisaki turned around and simply said "Follow me."

He expected the brat to shut up and obey but instead the little brat got mad "And why should I!? I don't even know you!"

Chisaki turned around to glare at him "I'm not asking you. Besides, you owe me."

Izuku stood up, a bit shaky but glare anyway "Owe you what?"

"I helped you, I gained nothing from doing it, but I did it anyway."

"So? That's just common courtesy. What? Don't tell me no one had helped you before?" Izuku asked and Chisaki remembered the kindness of the boss. He didn't gain anything from doing it... but he still took him in. And tried to stir him in the right way.

"Someone did." Chisaki said and Izuku grinned, knowing he was right. "Say, does your face hurt? From the punch I mean."

Izuku rubbed his bruise "A bit."

Chisaki nodded "I can heal them to avoid an infection. We can do it on the way."

"On the way to where?"

"You'll see. It is about your parents." Izuku eyes widened and gulped.

"A-Are they okay?" He asked in a panicked voice.

"I'll explain in the car. Now come."

Izuku decided to obey this man, and followed him to the black car. Inside, Chisaki started to clean the bruises and scrapes and putting bandages on them. "Are you a doctor?" Izuku asked and Chisaki shook his head.

"I am not. But I know my way how to treat people." Chisaki explained "I don't like diseases."

"Me neither. I hate when my tummy hurts." Chisaki founded that comment amusing, smiling behind his mask.

"Yeah. Me too." After he was cleaning him, he called the boss, to inform him they are on his way.

"Chisaki, do you mind inform him on the situation of his parents?" The boss asked.

"I don't mind."

"Thank you, my boy. Remember to do it with kind words. This kid is innocent from what the parents did." After that, the boss hung up and Chisaki turned to Izuku that was looking out the window.

"Hey." Chisaki said and Izuku turned to him "You need to know something."

"Is it about mom and dad?" Izuku asked and Chisaki nodded. "You're one of those Yakuza guys dad talked about, right?"

Chisaki was impressed by the deduction of the brat. "I am. A problem with that?"

Izuku blinked at the hostile question "Should I? I mean, dad said you gave him money. So you guys are good, right?"

Chisaki blinked. This kid saw the Yakuza as good people? That's... new.

"So, what happened to them? Are they okay?" Chisaki snapped out of his thoughts at the question.

In one hand, he could tell him the truth and ruin the view this kid had on the yakuza. But, in the other hand, he could say something else. A lie that isn't too farfetched from reality. He just needs to make sure the boss doesn't find out.

"Your parents left us." He said and Izuku face fell from hopeful to confused?

"I... don't get it."

"They..." Chisaki was thinking quickly to invent something "Died on a disease. We were treating them but they passed out."

That was the worst lie he ever heard. The kid was smart, he probably sees right through it. He blew I-

"They're dead?" was the only thing that came out of his mouth. Guess that the shock of this new surprised him. Chisaki nodded and Izuku started to cry. Suddenly he jumped and hugged Chisaki and cried on his shirt.

Chisaki was frozen, not liking the contact of another human being. He patted his back awkwardly and gulped "Don't worry. Everything will be fine. Trust me."

*Shie Hassaikai HQ*

Chisaki enter the room where the boss was waiting, next to him, Izuku with red eyes from crying.

The boss smiled at the boy "Hello Little Izuku. It seems Chisaki already told you what happened. Didn't he?" he asked giving a glance to Chisaki that nodded.

Izuku nodded and sniffed making the old man squeeze comforting his shoulder "Tell me, do you have anywhere to go now?" Izuku shook his head and the old man nodded "Well, why don't you stay with us? You can become one of us, and help us."

"Really?" Izuku asked. He can be part of the yakuza, the people that tried to save his parents.

"Only if you wish it. After what we had done, I am not going to force you."

Izuku gulped s Chisaki place his hand on his shoulder. "This is what I talked about earlier. You owe us. This way you can pay your debt."

The boss glared at Chisaki "Chisaki! Don't pressure the boy into joining us!" He scolded but Izuku made his resolve.

"I will join." He said, with determination on his eyes. "I will repay the debt my parents had with you."

The boss was impressed by the boy's resolve and chuckle. "Very well, Little Izuku. Welcome, to the Shie Hassaikai."

*10 Years Later*

Izuku was wearing a black leather coat, with green fur, a white shirt with a black tie. He had a black medical mask and medical gloves of the same color. He had his green messy hair as he followed Chisaki.

"You heard the news?" Chisaki asked and Izuku nodded.

"The boss son-in-law died, didn't he?"

Chisaki nodded "Yes. It seems that his daughter killed him by accident. Now we are taking care of her. And by we, I mean you."

Izuku raised a brow but said nothing. If Chisaki said so, guess that he didn't have a choice. "Where is she now?"

"In the guest room. You can go see her now." Chisaki said and Izuku nodded and walked away.

He made his little trip to the guest room, and knocked on the door. He didn't got an answer. "Coming." He said and opened the door.

It was a relatively small room, and he saw a small girl, in a grey medical gown, with grey hair, red eyes and a horn coming from her forehead.

"Hi." Izuku said with his hands in his pockets. The girl didn't answer and just stared at him. "Mind if I seat?" The girl didn't answer and he sighed. He sat on the border of the bed. "My name is Izuku Midoriya. And yours?"

The girl eyed him before muttering "Eri..."

Izuku nodded "Eri... that's a nice name."

Eri blushed and covered her face with the blankets "T-Thanks..."

Izuku chuckled as he removed his right glove "Well Eri; my job is to be your nanny now. So, what you say if we become friends?" He grabbed a small bullet from his pocket, and slwoly, a red rose bloomed from it.

Eri eyed the transformation with wide eyes and when Izuku handed her the flower she gulped. It was really pretty and it also smelled nice.

"So, friends?" Izuku offered his hand to Eri that hesitantly took it.

"Friends..." She said with a small smile.

Next Chapter: End of the Deal