Hunched over and crawling like a black widow within the halls of Father Martin's Holy Orthodox Academy, was an unholy creature, a booger of Saten.

"Imp" shouted a rebellious maiden of this school.

She wore a drunk rebel version of her Victorian uniform. A black knee-length dress with black stockings and shoes. But instead of an apron that was supposed to go around her dress, she had two loose as-goose belts making an X on her.

The belts jingled with the ammunition on them, as she pointed her flintlock pistol at the demon's face. This scum of hell took one glance at this raven-haired maiden with a gun. Taking notice of her emblem embedded on the collar of her dress, the Imp realized they were face to face with a demon hunter.

The halls echoed loudly with the heart-stopping bang of the demon-hunting maiden's gun. Nothing remained of the Imp as upon death, their body disintegrated.

Mary Von Leuchvex was this young slayer's name. The last daughter of the Leuchvex demon-hunting family flicked her knife-chopped, Wallace Bob cut hair to the side as she heard footsteps.

She found herself face-to-face with a pale young man, with a shy, but cheerful smile that made a crowd jealous. Yet underneath his timid and lengthy build, Mary saw something that put her and everyone else off of the young man.

His piercing crimson eyes.

"I-I heard a loud noise, are you okay?" he fumbled with his words.

Mary scoffed "If you hear a bang, that means a demon died."

"A demon died? Huh... Well, if you're alright, I better figure out how to get to class. Bye." he smiled politely and waved goodbye. Turning around, his wild brown hair wafted with a lone tiny ponytail that desperately held on to dear life.

In the proper uniform, Dario Achlys immediately got lost and never found his way to class.

Mary in the meantime took advantage of her hunter-family privilege and roamed the halls, making sure there were no more demons.

But to herself, Mary remarked how the frequency and class of the demons was growing exponentially. This to her was a sign of something evil about to expose itself like a deranged pervert. And when that soon-approaching day of fate arrived, she would need to be prepared.

Her arsenal would prove lacking, so Mary knew she would have to turn to something long abandoned.

A device created through ancient alchemy, known by many names. The Chastity Belt... The Holy Grail... But a more famous name for it is the Belt of Slaying.

This belt would grant the user holy armor and the power to beat any demon. On paper, it sounded fantastic, but in reality, it's difficult for one to use, as they must be a "pure soul", thus dramatically decreasing the potential pool of candidates.

But Mary knew of the perfect person to give this great power to aid her in the right against hell's spawn.

Suzy Roovy. Mary's best friend, and the saint of the school.

With her family's treasury possessing an old belt, and her recently recovering the blueprints for the belt, she believed she possessed all that she needed to battle the growing demonic forces of her territory.

Roughly a week had passed after Mary, used her family archive, and the rare blueprints to repair the belt, though she had yet to give it to Suzy for testing. It was only the other day when she completed it.

Until she could meet up with her, Mary would have to resume her vanilla school.

In class with everyone else, she studied with the enthusiasm of a sloth high off weed, that is to say, she did not care.

It was only when a demonic presence was so powerful, that it made everyone on the school premises feel as if they were drowning, that Mary momentarily wished she hadn't taken for granted her school life.

But a demon slayer had no time to wallow in regret when there were demons to slay.

She turned her gaze out the window to see three high-class demons.

A horn of Satan. A grotesque mass of black steel and flesh, towering at 8 feet of height, the mass was in the shape of a knightly executioner with a guillotine blade as a sword.

A Claw of Satan. Then, with arms that reach stretched to the ground, being longer than a giraffe's neck is compared to its legs. Yet there was elegance within the suits they wore to make them resemble a human butler, or perhaps it is the butler who resembles him.

And last, but by no means should you state near her presence, was Satan herself.

She looked human, but to think she is is to fall for the tricks of this Icon of Sin.

Emerald hair, long, flowing like a waterfall down her back, she possessed demonic wings, which wrapped around her chest, like a hug, to make a corset that taunted to reveal something but never would. Her legs, at first glance, seemed covered in purple tight, but in reality, it was all scales.

Her fringe, dances above her Piercing purple eyes which turned to the school building.

"Human!" Lilith, Queen of Hell shouted. "Obey me, or die! And for my first order of businesses..."

The thunderous crack of a gun echoed, as everyone saw Lilith hold a bullet between her fingers.

"Hm?" she hummed.

"Begone Demon! Or else!" Mary warned Lilith. "My name is Mary Von Leuchvex! A demon hunter!"

Lilith's pale pearl face crunched into a scowl "Leuchvex...? I'm the damned Queen of Hell, and I get one of the nobody clans to greet me?!" she spat with disgust and prepared to give enough pieces of her mind to kill Mary, however, the pitter-patter of rushing steps made her turn around.

Chugging down a bowl of porridge as he ran toward school Dario saw only his breakfast as he blabbered to himself "I'm late, late, late!" most of the porridge fell out of his mouth during his panicked muttering.

But it would all disappear as Dario crashed straight into the Demon Queen, covering her in his breakfast. Dario fell in front of Lilith who stood immovable but covered in his breakfast.

"Oh! I'm so sorry! Here..." Dario handed her his bowl and spoon, then pulled out a handkerchief to try and clean her, but he only ended up smudging the porridge all over her. Before the Demon Queen could kill him, Dario noticed everyone from his school looking out the window.

In Dario's mind, his teacher set this up to humiliate him as a punishment for once again being late. "Mister Foxtrot! It isn't my fault this time! My brother didn't wake me up!" he shouted, as he rushed into the school as the demon queen began sizzling with rage.

Everyone in the school felt the boiling heat from Lilith. If there was no fear before, there was now.

Lilith gritted her teeth as she said, "Get. Him. So I may KILL HIM MYSELF!!" She yelled, her entire body bursting into purple flames, frightening her two minions to summon lesser demons to go chase after Dario.

Mary was already out of her class, in search of her friend, Suzy, so she could hand her the Belt and together, push back the demonic invaders.

Racing without a wasted step, Mary arrived on the first floor where she found Suzy, a blond maiden, with long curling hair, coiled into a bun to shorten the length of her waterfall locks to fall down just under her shoulder. Surrounded by demons, anyone would understand why Mary chose her, not only was she more loving than a mother, and as graceful as a swan, but she passed the skills to dance around the demons.

Like a professional ballerina who had rehearsed a dance her whole life, she spun, slid, and leaped over all the demon attacks. No one could possibly consider that it was all improvised, yet it was.

The thunderous roars of a gun being fired, a grim contrast to Suzy's grace, saved her. Upon shooting down multiple demons, Mary dragged Suzy away so she could hand her the Belt.

"It's time" Mary muttered as she drew The Belt from a little satchel hidden under her dress, tied to her leg.

The Belt looked like an oversized belt buckle. It stretches from finger to wrist and is as thick as half a brick. Silver with golden trims, at the very center, was a ruby core. Suzy grabbed it and placed it on her hip, magically, two chains wrapped around her, explaining why it was called a Belt.

And as the demons gathered, the Belt did nothing.

"Mary? Am I supposed to do something else?" Suzy asked.

"No. It should just work!"

Mary fired her gun to ward off the demons. "Does it need a charge or something? Hand it here!" she shouted.

Suzy removed the belt tossing it to Mary, who placed it on her waist, which she quickly learned was a mistake.

"Inliberalis"

The Belt, like a machine used incorrectly, made a sound, to tell her she was unworthy. A sound followed by a horrifically painful shock that brought Mary to her knees and made her scream out in pain.

As The Belt fell off her waist, Suzy quickly got to her side, worried.

"Are you okay!?"

"Ugh..." Mary grunted, as she found the strength to form words once more "Stupid ancestors... You couldn't make a damn instruction book to go along with the blueprints!?"

As a demon charged at the two, Mary grabbed the Belt, preparing to throw it, but it was quickly snatched out of her hands by a young man, who walked past and kicked the Devil's booger away. Mary then noticed a ring on the young man's index finger.

This ring possessed the mark of a demon-slaying family she had seen before.

"Are you okay?" Dario turned around and asked, making Mary finally question who this boy was.

"We should get out of here!" Suzy suggested. "Once Mary's recovered, we can make a plan to-".

Dario interrupted. "These are demons, aren't they?" He wasn't paying attention to Suzy at all, he was more intrigued by these demonic creatures.

"My father taught me to always help those in need... And my mother told me if I ever see a demon, I should kill it until it's dead... Then kill it again."

Not even he noticed the grin growing on his face. "It seems I must put what I've been taught into practice." Dario raises the belt, to slam on his waste, an act almost instinctual to him.

Mary and Suzy shouted for him to stop "Wait-" but that didn't stop him.

The Belt landed and wrapped around him. But instead of receiving a shock or no reaction, Dario caused the belt to crackle with red electricity, which like a Tesla coil, hummed a jingle not yet discovered by humans.

This demon music compelled the devil's minions to rock their heads back and forth to the tempo. Dario did the same with his foot as he clenched his fist, never doing so before, Dario dug his nails into his palm, drawing blood.

Throwing his hand down, as if he was strumming a guitar, Dario splashed his blood onto the belt, causing a flash of red that consumed him like a wicked beast.

"Commit The Crimson Sin"

The hums of power commanded Dario.

As the light surrounding Dario faded, they no longer stood a timid young man, but a crimson and silver demonic-styled knight.

Fully clad in silver armor and this strange Crimson flesh-like substance with scales, had no humanity viable. Especially the face, as a silver helmet with a blank face with these large yellow eyes that curled inward at the tips.

Mary grabbed her gun and immediately aimed this "Crimson Sin" at both humans and demons.

"Mary? What are you doing?"

"That's..." she steadied her grip on her gun. "That's not at all how the Belt should work."

The Crimson Sin approached the Demons, with a confidence Dario has never shown.

One of the Devil's Boogers ran up to slash at him with their claws. Swinging their arm, it was stopped by Dario who caught it by the wrist. The eyes upon the helmet squinted into a glare.

Ripping off the demon's hand, Dario used it to cut the face of its now ex-owner. Tossing it aside, he quickly punches the demon's head off. As the others rush to attack, the Crimson Sin crouches down and uses his leg to sweep all the boogers off their feet.

He then demonstrated tremendous speed, by stabbing each demon with his leg, before they could fall. And with the shish-kebab of demons on his leg, Dario threw a mighty kick at the wall with such horrifying force that not only did the Demons become Crimson splat, but the wall he aimed at shattered, giving him a hole to the outside.

Lilith and her two minions took immediate notice of Dario who flicked his wing-like tailcoat with swagger and raced towards the mighty demons.

The Demon Queen was perplexed by what Dario had become. "The bloody hell?"

Two Devil's nails pounced toward Dario from behind with their hell-steel blades. He didn't wish to slow down, so Dario jumped and helicopter-kicked them. The first got stuck with his left heel and the other with his right leg. After a full rotation, they were nothing but gush, evaporating into red sparks which got absorbed into The Belt.

Landing with a slight spin, Dario came to a halt facing the demon hoard racing toward him and the two high-ranking demons behind them. Walking towards the demons, he uppercutted the first one into the air, grabbing it by the leg once it reached shoulder height.

Dario began swinging the demon around like a sword, beating down everyone that dared to face him.

Lilith attempted to piece out where Dario was getting this Demonic power from as The flying demons, known as Devil's Spit, came in from above as he finished off the ground troops.

Tossing his demon "sword" at one of the flyers, Dario staggered the one that flew, and the one he threw bounced back toward him. Leaping into the air, he used that demon as a stepping stone to get higher, so he could reach the Devil's Spits.

Landing on one, he made it careen towards another which he kicked like a soccer ball that pinballed into the rest, causing a chain reaction of falling Spit.

Stomping on the one he's on, Dario rose higher into the air, before coming back down like a meteor that struck with a shockwave. His "helping" Devil Spit, splattered like a thrown water balloon

Turning to the three biggest threats in the area, The Crimson Sin silently approached, until another Devil's Nail swung down his blade in his path.

The blade landed in front of his feet. Stepping on the blade, Dario elbowed Angelo while twisting his body. Continuing to move his arm, Dario then grabbed the Devil's nail by the face when his palm lined up with it.

Continuing to turn around, Yn used the momentum of his spin to throw this demon at their Queen.

The Devil's Horn knocked the nail away whilst Dario grabbed its blade which was left behind in the ground then dashed towards the Horn.

Polishing her nails against her "clothing" Lilith looked unimpressed.

"Hmph! I see you wear your ego on your sleeves! No wonder you dared to humiliate me by pouring that sweet gooey substance onto me."

Dario swung down the blade he took at Lilith who raised two fingers and blocked the blade with her fingernails.

"I am the damn queen of hell. You don't bloody stand a chance."

Mary with Suzy watched from the hole in the wall as The Devil's Horn and Claw both stabbed Yn in front of the whole school. Lilith then snapped Dario's stolen blade in half and shoved the broken half into his chest next to the other weapons.

This made Lilith cackle, loud and proudly, as she believed she received her revenge.

Dario dropped the broken blade. Making Hell's Queen laugh more maniacally. He then grabbed the Horn and Claw's weapons.

"HAHA- Okay, why aren't you dead yet?"

With all his might Dario pushed their weapons out of his pockets whilst slowly walking towards Lililitg who was only a few inches away. Crossing her arms as Dario placed his forehead against hers, the Crimson Sin began pushing all three demons back who either stared at him confused or amused.

The scene was somewhat comical thanks to the demons standing as still as statues. The only reason they were being pushed back was that the ground gave way.

Once Dario removed The Claw and Horn's weapons he tore out the broken half of the blade Lilly left, tossing it to the side as he stoically glared.

Lilith's amused grin turned bitter. "What in all the realms are you?"

Strumming the belt once more, it spoke again.

"Crimson Punishment"

Demonic energy began gathering around him. But not just any demonic energy. Their demonic energy.

"Bastard! So that's where you got it!"

The three finally made some distance between him and themselves. Dario dashed at the three. Throwing himself in the air to dropkick Lilly, but a Devil's Nail ran in front of the attack and got pushed further into it by Lilith

Ferociously, the Nail exploded as it screamed wildly before bursting into red crystals made from the blood of all the humans it had killed. The blood crystals were absorbed into the belt, but during the explosive climax of the Nail's life, Lilith and her minions left, the perfectionist Queen had no interest in invading Earth without an army.

As thr smoke died, the students and teachers cheered at this mysterious person who simply stood in silence with no enemies around for him to fight.

Only when Mary fired at him, did Dario begin to move again. Putting his hands behind his head, Dario casually made his way to her. Entering the hole in the wall with her and Suzy, Mary placed a gun against his head.

"Fork over the belt!"

Crimson Sin's large yellow eyes almost seemed to roll.

Nevertheless, he complied, removing the Belt and reverted back into his normal human form, however, he immediately fell unconscious into Mary's arms.

"Whoa! Don't fall asleep dipshit!"

Dropping the belt to catch Dario, Suzy  is left to pick it up as the whole school comes to thank the Crimson Sin.