In a Dojo under a house in Mustafu, you could see two people exchanging blows at an astonishing speed, one of the two person was an adult man with black hair, Midoriya Hisashi. He never was a man whose expressions were visible on his face but people that knew him could have guess that he was really surprised. Surprised that his 4 year old son had an amazing talent for fighting, he didn't learn their family secret art yet and wasn't using a quirk but he was able to trade blow for blow against him. Even though during the spar Hisashi didn't go all out, it was really mind-blowing seeing his black haired son refusing to lose.
"Stop both of you, I have a good news and a bad one" said a green haired woman who was walking in direction of the arena. (???)
The two fighters stopped fighting when they heard her. Young Izuku was pouting because he was interrupted in one of his favorite hobbies fighting.
"Couldn't you stop the fight after my win?" (Izuku)
"As if you would have been able to win against me" (Hisashi)
"I will bite you to death old man!" while taking a fighting stance (Izuku)
"Both of you stop please, it's really important" (Inko)
"What's so important that makes me unable to correct this omnivore's behavior?" (Izuku)
"Izuku you're going to be a big brother" (Inko)
"And what's the good news?" (Izuku)
"…"
"…."
Inko then punched Izuku on the head 'Fist of love style'. Hisashi laughed.
"You still don't know how to talk to him after all these years. What she is saying Izuku is that you will need to protect your new sibling so you will need to grow stronger to keep them safe" (Hisashi)
"Even if they are herbivores?" (Izuku)
"If they are you would have more people to fight to protect them" (Hisashi)
"What's the bad news then?" (Izuku)
Inko hesitated, she knew he would not like it "We are going to do your quirk exam tomorrow"
"Not going, I don't need a quirk till I have bitten him to death" while pointing to Hisahi.
"Come on Izuku don't you want a cool quirk like Kaachan?" (Inko)
"Even with his quirk he is weak. So no thanks i'd rather use my own strengh" (Izuku)
"I just remembered that you still need to apologize to him" (Inko)
"What did I do wrong?" (Izuku)
"You injured him, little devil" (Inko)
"What did I tell you about beating up your classmates" (Hisashi)
"To not bite them to death" (Izuku)
"And what did you promised me to do?"( Hisashi)
"To not bite them to death" (Izuku)
"And what did you do?" (Hisashi)
"I left him near death's door, so there is no problem" (Izuku)
Hisashi laughed. Inko sighed once again while patting her belly. "May this one not be like you"
"Son weren't you supposed to only beat people who didnt respect the rules?" (Hisashi)
"That's what I do" ( Izuku)
"Clearly that's not what you are doing…"(Inko)
"Honey, you are asking the wrong question again. The right question is what rules did you put?" (Hisashi)
"Not in classroom before the bell… Bitten to death. Making sound while im sleeping…Bitten to death. Not in proper school uniform…Bitten to death" (Izuku)
"But your school doesn't even have a school uniform!!!" (Inko)
"I know" (Izuku)
"…" (Hisashi)
"…" (Inko)
"So we cant do anything about that. What about your quirk little devil?" (Hisashi)
"Still not going just for that" (Izuku)
"What if I start teaching you our family martial art?"
'Family martial art? That means that to see my progression we will need to spar more. You fool I outsmarted you' (Izuku)
"Whatever" (Izuku)
'I know you think you outsmarted me but I would have taught you anyways, I outsmarted your outsmarting' (Hisashi)
Inko : "I forgot to tell you the Bakugo's are dining with us"
'Not the noisy family' (Izuku)
"Can I stay in my room ?" (Izuku)
"Why do you ask when you already know the answer ?" (Inko)
"Okay good night"(Izuku) He then started walking in the house direction. Inko walked behind him.
"You are not going to disrespect our guest by staying in your room, you will stay with them and be a good host" "You are not coming with us Hisashi?" (Inko)
"Both of you go, I will clean the mess we made while fighting" (Hisashi)
Izuku and Inko left. Inko kept reminding him that if he was not nice to others, he will be alone. Izuku tried to explain to her that that was his plan, so he could fight more enemies at once.
Hisashi was cleaning the dojo when he spat a mouthful of blood.
'So it started again, its more violent than last time. My end is near, its sad that my own quirk is killing me. How can I have the only quirk in the world that is deficient enough to kill its user. I need more time, I must teach him well to protect the family and if possible change his personality a bit'
Hisashi quirk had been misdiagnosed as a fire breather type of quirk but in reality it was a stockpile type of quirk and when his body reach the maximum energy it could holds, the surplus of energy was expelled by his mouth in the form of a flame torrent that burned his throat. The rest of the energy was used to quickly heal his throat. That gave him throat cancer but as if it wasn't enough now his quirk was gaining in prowess and the accumulation of energy was breaking down his body and building it back up. But his heart and lungs couldn't keep with it.
'I shouldn't fight with him anymore, it will just accelerate my death, but it will make him so happy'
He then walked to the house with a little smile on his face.
------------------------------------------------------
Inko was preparing the dinner when someone knocked at the door
"Izuku! Go welcome our guests" (Inko
A irritated Izuku went to the door and opened it.
"Its been a while we didn't see you little devil!" (Mitsuki)
"Hn" (Izuku)
"You didn't change a bit" (Masaru)
"Fight me Dek…" (Katsuki)but before he could finish his sentence that his mother smacked his head.
"Don't you remember what happened last time ? " (Mitsuki)
"Yeah I do hag, that punk got lucky" (Katsuki)
"Who are you calling hag, just shut up!" (Mitsuki)
'Yelling in front of my house, sentence : bitten to death' (Izuku)
He prepared to attack them but before he could do any movement Mitsuki gave him a small box.
"It's a present for you little devil" (Mitsuki)
"What is it?" (Izuku) with a surprised expression on his face
"Open it you will love it" (Masaru and Mitsuki)
He opened the gift while they entered in the house. It was two small wooden tonfas. He immediately fell in love with them.
'As a thanks nobody will be bitten to death today' (Izuku)
Nobody knew but this simple gift will lead to a life time of trouble for anyone who will dare to stand in his way.