Tokyo, a rented apartment.
Arthur woke up groggily, rubbing his eyes.
"Ah... so bright. I must have forgotten to close the curtains yesterday."
The sunlight streaming through the window was blinding, but he was too lazy to get up and close the window. He simply rolled over, lying on his side and sinking back into his dreams.
"It's a day off, no one can disturb my sweet dreams."
Arthur intended to go back to sleep, but his stomach growled loudly, protesting its emptiness. Reluctantly, he sat up, still half-asleep, and began to get dressed.
Yawning, he muttered, "Today marks the 68th day since I was transported into the Chainsaw Man world, and the 68th day my hatred for the Goddess Eris has deepened."
Yes, Arthur was a transmigrator. Sixty-eight days ago, while walking home, he was suddenly transported to another world.
A flash of white light, and the beautiful Goddess Eris appeared before him.
With a gentle smile, she said, "Mr. Arthur, you have been transported."
"Huh?"
"Mr. Arthur, the world you're about to enter is no ordinary one. It's a conglomerate of various anime worlds. And...
Eris gracefully extended her slender fingers, pinching the edges of her skirt and lifting it slightly, revealing her petite, bare feet. She tiptoed closer to Arthur, whispering softly in his ear, her warm breath tickling his skin.
"Moreover, this world is entirely populated by women, not a single man in sight. Even characters who were originally male in their respective anime are now beautiful women in this world."
"Your mission is to uncover the truth within this world and ultimately defeat the powerful Demon King. Are you ready? Let's embark on this journey!"
Ignoring Arthur's questions, Eris clapped her hands, and with a flash of white light, Arthur vanished, only to reappear in this new world.
Sixty-eight days have passed since then.
Rubbing his eyes and yawning, Arthur got up to cook, only to find the fridge empty. He remembered finishing all the food last night.
"What a hassle. I'll have to go to the convenience store."
After tidying up, Arthur left the apartment.
"Hopefully, today will be as smooth as usual, without any demon rampages on the streets."
This world was unlike any other, being the setting of Chainsaw Man, where humans and demons coexisted.
In the past 68 days, Arthur had encountered two demon rampages: the Cucumber Demon and the Yellow Eel Demon. Their appearances were sanity-shattering, and their strength was inexplicably powerful, leaving a profound impact on his young mind.
It was as if a Hollywood blockbuster had been filmed with the twisted aesthetics of a small country.
After buying groceries at the convenience store, Arthur waited at a street corner for the traffic light to change. His gaze drifted towards the nearby giant mall, Keio Department Store.
"This traffic light is taking forever."
BOOM!!!
The mall suddenly exploded with a deafening roar! A massive mushroom cloud soared into the sky, casting a dark shadow over the area.
The shockwave from the explosion hit like a hurricane, blowing Arthur's clothes against his body, creating a rustling sound.
People around him screamed and scattered in all directions.
"Damn! My luck's run out! A demon in broad daylight!"
From the blazing ruins of the mall, a massive black figure emerged, its body covered in large patches of red, clearly wounded. The figure looked grotesque against the backdrop of flames.
"Bat Demon!"
Arthur instantly recognized the demon.
The Bat Demon flapped its wings erratically, hovering in the air. One of its giant claws caught Arthur's attention...
Squinting, he noticed someone hanging from the claw.
It was an officer from the Public Safety Devil Hunters, identifiable by their uniform. She had stabbed her weapon into the Bat Demon's claw, gripping it tightly as she dangled in the air.
Eventually, the Bat Demon could no longer hold on, and both it and the officer plummeted to the ground.
Arthur glanced at the fleeing crowd, then at the officer's falling direction. Gritting his teeth, he ran towards her.
He soon found her amidst the rubble.
"Early... Hayakawa Aki?!"
Arthur exclaimed, realizing that just as Eris had said, this world was entirely female, and even originally male characters had been transformed.
This woman bore a resemblance to Hayakawa Aki, but as she lifted her head, revealing a delicate, somewhat fragile face, Arthur recognized her as the gender-swapped version of Hayakawa Aki.
Aki's hair tie had fallen off, and she was pinned beneath several large rocks, her face contorted in pain.
Arthur rushed over, trying to push the rocks off her.
"Hey! What are you...? Unrelated personnel, retreat to safety! It's dangerous here!"
"No time to explain, I'm here to save you!"
Suddenly, a loud roar shook the ground. The Bat Demon, which had seemingly fallen somewhere, took flight once more, reappearing in the sky.
Its grotesque head scanned the area, instantly spotting Arthur.
"Grrr... Curse you, ninja! I'll swallow you whole!"
The Bat Demon's words were slurred. It flapped its wings, diving towards Arthur at incredible speed. With no escape, Arthur steeled himself, pushing the rocks aside and reaching for Aki.
[Ding~ Detected host in imminent mortal danger. Transformation System activated.]
[Ding~ Detected host's first encounter with main character Hayakawa Aki. System rewards 3 points.]
[Ding~ Detected Hayakawa Aki's guilt. System rewards 20 points.]
[Ding~ Newbie gift pack awarded: Choose one 3-minute trial card from three male anime game characters.]
[Fate: Arthur Pendragon]
[Genshin Impact: Dainsleif]
[KonoSuba: Dust]
There was no time to save Aki. Arthur felt the Bat Demon's lethal threat as its massive form loomed over him, its jaws snapping open.
Arthur glanced back, catching a clear view of the Bat Demon's massive fangs and the nauseating saliva within its mouth.
"Run!"
Aki reached out, intending to push Arthur away.
[Ding~ Detected Hayakawa Aki's urgency. System rewards 5 points.]
"I choose Arthur Pendragon!"
[System confirmed. Host has used the newbie gift pack. Transformation initiated.]
A blinding golden light erupted from Arthur's body, enveloping the entire area.
The light seemed almost tangible, knocking the Bat Demon away.
Aki shielded her eyes from the brilliance.
Within the golden light, Arthur's body slowly levitated, a silver-white armor materializing around him.
Chapter 2: The Gender-Swapped Hayakawa Aki
The blinding golden light forced Aki to shield her eyes. As the light gradually faded, she adjusted her vision, taking in the figure before her.
Tall and slender, clad in gleaming silver-white armor, with a flowing blue skirt dancing gently in the wind...
[Ding~ Transformation System activated.]
[Transformation Character: Fate: Saber Arthur Pendragon 3-minute trial card.]
[Weapon: Sword of Promised Victory, 3-day trial card.]
[Skills: Magic Resistance A, Riding B, Instinct A, Charisma EX, Mana Burst A, Leadership B, Beast Hunter A, 3-day trial card.]
[Noble Phantasm:
Anti-Fortress: Sword of Promised Victory
Anti-Personnel: Wind King's Barrier
Barrier: Distant Utopia, 3-day trial card.]
"Wow... this is amazing... I've really become Arthur Pendragon..."
Arthur clenched his fists, feeling the transformation's effects on his body.
The Transformation System grants abilities based on the host's points (except for the newbie gift pack).
The system doesn't alter the host's body, only changing eye color, hair color, or length to fit the transformation concept.
"Who... who are you?"
Arthur turned to Aki, their eyes meeting. Aki was momentarily stunned.
How handsome... Those emerald eyes, like clear, deep lakes, and that beautiful, delicate face... yet, there was an indescribable charm about him...
In this world, where only women existed, the absence of men was a given, taught in elementary schools.
But now, that consensus was shattered. Arthur, the sole male in this world, exuded a unique charm.
It was the masculine pheromones, the scent unique to men.
Aki knew nothing of pheromones; she only felt her heart racing, drawn to him inexplicably, unable to look away.
Arthur was about to respond when his instincts kicked in, and he looked in another direction.
"Grrr! Grrr! Grrr!"
The Bat Demon, recovering from its shock, roared furiously. Its massive wings stirred up dust and debris as it charged towards Arthur.
Arthur reacted instantly, assuming a fighting stance.
Aki noticed his strange posture, holding an invisible sword, and shouted anxiously.
"Hey! What are you doing? The Bat Demon's coming! Dodge!"
"It's fine. Let it come; saves me the trouble of going to it."
Arthur's weapon was invisible to Aki, thanks to his Noble Phantasm.
Wind King's Barrier: By layering winds, the light refraction obscures the sword, making it hard for opponents to judge distance and trajectory.
The Bat Demon's fangs loomed close, saliva flying. Arthur crouched, his hands gripping the hilt, and with a burst of speed, he became a blur of blue light, slicing through the Bat Demon's neck. He reappeared behind it, flinging the hot, floating blood to the ground.
The Bat Demon froze mid-air, a black line appearing across its thick neck. In the next second, blood gushed like a waterfall.
Its head fell, rolling on the ground, its bewildered eyes reflecting Aki's shocked face.
"Phew, easier than I thought. Beast Hunter's too strong, treating it like a wild boar. Who says I'm only good for hunting wild boars? I can take down giant bats too."
Arthur kicked the Bat Demon's corpse, confirming its death, then returned to Aki, helping her up and leading her to safety.
Aki was still in shock, speechless.
Arthur glanced at her, noticing a tear in her uniform, revealing a glimpse of her chest. He casually adjusted her clothes.
Aki, realizing her torn uniform, blushed furiously, turning away, looking adorable.
[Ding~ Detected Hayakawa Aki's embarrassment. System rewards 15 points.]
"This Transformation System's interesting, rewarding points based on others' emotions. I'll have to check it out later."
Arthur thought to himself.
"Aki-senpai! Are you okay?! The ambulance is on its way! Where's the Bat Demon?! Everyone, stay alert for ambushes!"
Other Devil Hunters arrived, calling out to Aki.
Aki responded, her face still red, "I'm fine. The Bat Demon's been dealt with."
She pointed to the distant corpse.
"Aki-senpai, why are you so red?"
"Cough! It's nothing, just a physical reaction. Focus on your duties."
Arthur helped Aki sit on a fallen pillar. "I'll be going now."
Aki urgently asked, "Wait! Can I have your name? I don't recognize you from the force. Are you from a civilian devil-hunting group? I'll find a way to repay you!"
"Hmm..."
Arthur scratched his chin, thinking.
"My name's Arthur. I'm... neither a civilian devil hunter nor part of the Public Safety Devil Hunters. I'm a mercenary. That's all. Take care."
[Ding~ Detected Hayakawa Aki's embarrassment. System rewards 15 points.]
Seeing Aki's face turn from red to crimson, Arthur smiled, jumped up, and left.
"Arthur..."
Aki watched him go, whispering his name.
"Aki-senpai, are you alright? The ambulance is here! Where's the Bat Demon?! Everyone, stay vigilant!"
"It's handled. The Bat Demon's dead."
Aki pointed to the corpse.
"Aki-senpai, why are you blushing?"
"Cough! Nothing, just a physical reaction. Focus on your tasks."