AN: Okay, well this is my first story I'm going to be publishing... anywhere really. This is actually one of about four or five diffrent stories I began writing and depending on how things go with this one... well we'll see. This story is a crossover of MHA and Strike the Blood and I own neither of them... sadly. My Hero Academia is owned by Kohei Horikoshi and Shonen Jump, and Strike the Blood is owned by Gakuto Mikumo, Manyako, and Hiroyuki Yoshino.

Prologue: The Origin of the Blood

Musutafu, Japan year 22XX, Izuku Age 5

-No one in this world is born equal. This is something I learned when I was only four years old.-

In a small park somewhere in central Musutafu a young scraggly boy with wild dark green hair big emerald, green eyes and four freckles in a diamond pattern on his cheeks, wearing a light green t-shirt, green cargo-shorts and red high-top sneakers stands trembling in front of another crying child with his fists raised in a weak fighting stance and trembling. The only thing that set this boy apart from his peers was the small fangs the boy had hardly any larger than normal eye teeth.

"K-Kacchan p-p-please stop hurting him… that isn't how a hero is supposed to act! I-if you don't stop then… I'll stop you!!" The boy named Izuku Midoriya stutters softly with growing conviction, while trying to keep the boy behind him safe. In front of Izuku are a group of three other kids one was a larger child with red bat-like wings growing from his back, the second was a skinnier kid with each of his fingers seeming to extend from his hands as if they were limbs of their own. Though it was the final child with spiky blond hair and ruby red eyes who kept most of Izuku's anxious attention, especially with the dark look and grin he was giving the greenet.

The blond boy, 'Kacchan' known by everyone else as Katsuki Bakugo seemed to stop for a moment before getting an angry look on his face and replying with a disturbing amount of venom in his young voice, "Damn Deku, who the hell do you think you are huh? I'm just showing this worthless extra where he stands in the world." While speaking the boy starts to raise his hands with sparks starting to appear from them. The boy continued, "Now, if you don't get out of my way you damn nerd then you can take that useless extras place and get beaten down like the useless piece of quirkless shit that you are!!!"

-A few moments later-

The green haired boy Izuku laid on the ground beaten and bruised sullenly thought to himself 'Why Kacchan… why does everyone treat me so badly? Is it because… I don't have a quirk like everyone else?' As he thought this Izuku looked back on the day that everything had changed, the day that he lost not only his best friend but any chance of gaining a quirk.

-Flashback, Izuku, Age 4-

"You might as well as give up." Was the nonchalant response of an older doctor with a large grey mustache, large tinted circular glasses with magnifying glasses attached to the frame.

A younger Izuku sat in front of the doctor along with a young woman who looks to be in her mid-twenties with similar green hair to Izuku. This woman is Izuku's mother Inko Midoriya. With a worried look in her eyes. "Oh my, excuse me Doctor there must be some mistake." The worried mother continued "I mean I know that all the other kids in Izuku's class have already awakened their quirks. I mean Izuku's father, and I both have quirks, weak as they are, but are you sure that Izuku is not just a late bloomer?"

The Doctor named Garaki sighed and replied to the question in a tired voice, "Look, there have been many tests done on quirks and the effects on the human body they cause. Usually, a child would have either a powered-up variant or combination of their parents' quirks, but as is the case of some children of early generation quirk families." Rolling his chair to a board with Izuku's X-rays lit up on it, pointed to the area of the boy's pinky toe. "There is sometimes a chance of a child of fourth generation or similar generation children being born with two joints in their toe, this indicates that the child is not able to develop a quirk. It is purely a case of a genetic mishap."

Listening to these words young Izuku showed a look of wide-eyed shock, dropping his All Might action figure and feeling his hopes and dreams of being a hero just like his idol All Might slipping from his fingers before he could even try. Looking at her son in worry Inko uses her quirk to pick up the action figure and holds onto it. After a few minutes of scared thought Izuku slowly looked up to the two adults and asked in a quiet voice "M-m-mom can we go home please?" Slowly with tearful eyes Inko took Izuku's hand and walked from the room.

Back in the office Doctor Garaki waited until the door had completely closed before darkly chuckling to himself. "Hm-hm-hm… such fools," The man looked down at the data taken from the tests he had conducted on the boy, 'To think there would be another quirk that could have the potential to surpass even All For One… hmm I should tell sensei, but I wish to see the possibilities of this quirks growth.' Garaki thought to himself slyly while hiding the files of Izuku's quirk results on a private secure drive and making up false papers to show the boy's quirkless status. With a sickening smirk Garaki had one last thought before continuing his day, 'Well Mister Midoriya, be sure to give me a good show of your potential.' "Heheheh-hahaha-HAHAHAHAHA!!!!!!!"

-Later That Evening-

Back at their small apartment Inko Midoriya was both sad and worried for her little boy. Ever since the two had returned from the quirk doctor her son had shut himself in the computer room for the last three hours at this point, he didn't even come down to eat his favorite dinner Katsudon. Sighing to herself, Inko went to the office where the Midoriya's kept the computer. Knocking softly Inko opened the door to find the lights off with only the light of the computer screen illuminating the area and the familiar sound of the Number One Hero All Might laughing coming from the speakers a small bundle sitting in the chair in front of the screen where sniffling could be heard. Hearing this Inko's hurting heart cracked a little more seeing and hearing the pain her biggest light in her life was in. Slowing walking to the bundle in the chair she was surprised to suddenly hear a soft hurt voice.

"M-Mom see, he always saves people with a smile…" the top of the blanket turns to Inko showing the tear-filled eyes of Izuku as he continued, "Mom… d-do you think I could be a hero just like All Might?" These words were the final straw for the distraught mother, Inko leapt forward hugging the boy to her while crying.

"Izuku, Izuku, Izuku I am so-so-so sorry… I wish I could have done something more" Inko continued to apologize blaming herself, not seeing the small red spark in Izuku's eyes while he began to cry even more.

-Those weren't the words I needed to hear mom; I needed you to believe in me not blame yourself-

-One Week Later-

Life for Izuku did not become any better when he had returned to his pre-school. Izuku's quirkless status had been told to the other children by the teachers when they had received the news from the records office in the school.

Unknown to most in the school district, this school along with others in the area held slight quirkest ideals. This means that the more powerful the quirk the more praise and privilege was given to the child or individual. The opposite was also true weaker quirks or heaven forbid a quirkless would be looked down upon or in the case of a quirkless… well a weakling should not be put before the strong or their natural betters.

This meant that days before he had come back, the teachers who were part of the quirkest told the students that Midoriya was lesser than the rest of the students and should be treated as if he had a handicap or worse in some cases. One such student to latch onto this was Katsuki who saw this as a perfect way to finally put the annoying useless Deku in his place and keep him from bothering him or besmirching his reputation as the future number one hero.

The day he returned it was hard for Izuku not to notice all of the other kids in his class no longer talked to him, or if they did it was usually to insult the boy. The teachers did nothing or even encouraged the behavior. Izuku noticed that while he was still taught the same as the other kids in his class, the teachers would no longer answer any of his questions. Of course, being a very intelligent child Izuku improvised by finding the answers on his own in the library.

The final nail in the coffin of the start of his horrible time was when Izuku attempted to speak to Kacchan at lunch the day he came back. As Izuku looked around the playground for Kacchan's group of friends, he finally found them near some of the play equipment. Approaching the group Izuku waved to his 'best' friend.

"Kacchan I've been looking all over for you!!" Smiling widely and running towards the group Izuku did not notice the dark look in the eyes of Katsuki and his group before he had gotten to close and was immediately knocked down by a strike from none other than Katsuki himself.

Looking down on the boy who was formerly his friend Katsuki Bakugo started yelling at the young greenet, "YOU DAMN NERD, WHO THE HELL DO YOU THINK YOU ARE APPROACHING US LIKE WE ARE FRIENDS HUH!?!" The blonds' hands began to smoke and pop as he continued his rant "I WON'T LET YOUR QUIRKLESS ASS DRAG ME, THE FUTURE NUMBER ONE DOWN. SO, KEEP AWAY FROM US IF YOU KNOW WHATS GOOD FOR YOU, YOU DAMN DEKU!!!!!" By the end of his rant Izuku was crying his eyes out and ran from the area as the other kids around him began to pile on even more insults adding to the damage caused by his now former best friend.

-End Flashback-

Slowly standing to his feet Izuku looked around seeing that the park was now empty. Slightly sweat dropping at how long he had been reminiscing on his not so pleasant past. With a slight wince Izuku slowly made his way home to hopefully keep his mother from worrying to much and possibly crying a literal flood into their apartment… again. With a sigh Izuku continued on his way with a single thought in his mind. 'No matter what anyone says, or how many times I'm knocked down, I will achieve my dream. To become as great or a greater hero than All Might!!!'

-Little did I know this belief would lead to the end of my life as Izuku Midoriya the human and to the birth of the world's greatest hero 'The Blood Ruling Primogenitor Hero: Kaleid Blood-