In ancient Japan there is a family of great renown. Considerable wealth and power but small. The matriarch gives birth to a boy who's deathly ill. 21 years of countless doctors unable to cure him. Until someone shows up claiming nor only can he cure...
The Kibutsuji family. They were a small family of considerable wealth and power in ancient Japan. The matriarch had just given birth to a boy. Though he was deathly pale. They called doctors to the estate to determine what was wrong. And they all said the same thing.
Random doctor 1: he has 23 years until this disease kills him. Random doctor 2: he's very weak. This disease will kill him in 23 years. Random doctor 3: he doesn't have long. I'd say 23 years.
Unwilling to let their baby boy die they commissioned the best doctors from all over Japan but they always gave the same response.
Random doctor: sorry but he can't be cured with today's medical knowledge. Maybe in a decade we'll be able to make a cure.
Over the next 21 years countless doctors came. You were so frail you couldn't walk far on your own, breathing was painful, your skin was always pale. People always commented on your appearance saying things like.
Random person 1: he doesn't look good Random person 2: he's so pale it's creepy Random person 3: he doesn't have long.
You hated those words. They made you angry. One day a man shows up at the door. With an experimental medicine that he said if works will not only cure him. But make him stronger than anyone alive. Skeptical the matriarch and patriarch lead the man to you. When they enter the room a young man is on the floor. He was struggling to breath and appeared to be in great pain.
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Y/N: Tch! Another doctor? Let's get this over with. Random doctor: young man. With me I have an experimental medicine that uses the rare and elusive blue spider lily. I've tested this on animals and have gotten amazing results. However since you've had your disease so long it'll take a day at most for the medicine to start working. After that we can administer the final dose. Sound good? Y/N: whatever. Let's get this over with.
The doctor pulls out a syringe from his briefcase and sticks it into your arm.
Hours later
It's been awhile since the doctor gave you the medicineand its now nighttime. You started getting frustrated when you felt something. A newfound strength. You tore off your top and instead of the frail body you were used to seeing you saw a body visibly building muscles. Your stomach began to fill out from a starving man with visible ribs to an athletes body. Muscles bulged every time you flexed. You stood up on your legs for the first time in over a decade. You began doing various exercises completing them all. You call for your mother and father.
Y/N: Mother! Father!
Your parents rush in the room expecting you in some form of pain or such other things. However upon seeing you your mother drops to her knees in tears and your father cries.
Y/N: call that doctor in. I want the second dose!
Your father goes to fetch the doctor from a nearby room and your mother stands up and puts her hands on your cheeks.
Mother: my baby boy! I'm so happy!
Your father hurries in with the doctor who smiles upon seeing you.
Random doctor: Facinating! The medicine worked much faster than anticipated! It appears to affect the human body much better than the animals ive tested. Here let me give you the final dose! The man pulls out another syringe filled with the same blue liquid. He this time sticks it into a vein in the neck. After he empties the contents your body begins convulsing. You could feel strength unlike any other enter your body. The small hole in your neck closes. You felt yourself getting smarter, stronger, more aware of your surroundings. Then you had a thought.
Y/N: (I need to see the doctors notes. Once I've read them I'll kill him. This medicine would make others the same as me. I want to be the only one with this power. My parents will need to die as well. They know too much.)
Soon your body stops convulsing and your eyes change from blue to a deep red with a slitted pupil. Four fangs grow two on each set of teeth. Soon your body stops changing.
Y/N: doctor. Let me see your notes. Random doctor: of course young man.
Your parents decide to go to the wine cellar to celebrate while you and the doctor go over the notes. After going over everything you thank the doctor.
Y/N: thank you doctor. But your life ends here. Doctor: huh?
You grab the doctors face and crush it with a single hand. You throw his briefcase and notes into the fireplace and head to the door leading to the cellar. You place a chair in front of the door and set it under the handle. You then set fire to the estate and leave walking through the village.
Centuries later
It's been several millenia and you've experimented with your body. You found consuming the blood of special people makes you much stronger. You've called this blood type marechi. Another thing you've found is you can manipulate your own body mass to do various other things. You've also found that if you inject your own blood into another they become like you. You've used this method to infect other people and gain their loyalty. People who are desperate. One day when you were experimenting with your body you found you had supernatural abilities and that infecting a human would grant them their own ability. It usually related to their life style but could sometimes be completely unrelated. Another thing you discovered was by consuming the blood of those you infected you could Gain their ability. You also found consuming blood of humans granted minor increases in speed, strength, senses, and intelligence. You could give these increases to your followers and would still regain the lost increases over time. You found out you could control others you infected using the blood you gave them. With the control you could place "curses". Things like being unable to say your name, defying your commands and other things. You decided to call yourself and those you turned "demons" and with yourself as the "demon king".
