"Damn it!"
"Where the hell did I end up?"
"Is this even my country anymore?"
Before Yasui Ryosuke could react, a flood of memories forcefully surged into his mind, stirring it violently.
During the Meiji era, it was said that demons devoured people at night.
Among the people, there were also demon hunters who formed the Demon Slayer Corps to kill demons and protect humanity.
…
This is the world of Demon Slayer?!
What the hell!
Yasui Ryosuke cried, made a fuss, and—
No, he was heartbroken.
Heartbroken!
Damn it, I still hadn't used the hundreds of thousands of Primogems I saved up!
No one was left to protect Konohagakure!
I didn't even get the chance to wear my family heirloom Liu Tao outfit!
The terabytes of study materials on my computer hadn't been deleted.
The browser history on my phone, along with those random fruit apps and games like Agent and Beautiful World, hadn't been formatted either.
What if the police hacked my phone…
"My spotless reputation!"
Yasui Ryosuke howled toward the sky.
He was an upright and honest young man who did good deeds every day. He hadn't even been hit by a truck, so how did simply staying up late and sleeping once get him dragged here as forced labor?!
But the facts proved that staying up late could indeed cause sudden death.
Is transmigration performance this hard to achieve now?!
Good news: Yasui Ryosuke had carefully read the original work.
Bad news: He was about to die.
"Pfft!"
A sharp pain tore through Yasui Ryosuke's body.
He couldn't control the convulsions wracking his body and violently spat out blood.
Damn it!
The original host was a sickly person with little time left to live. His parents had been devoured by demons, and he himself had been saved by a fierce-looking one-legged old man with a cane.
"It's already this miserable… System, stop hiding!"
Yasui Ryosuke cried out in pain.
Buzz—
The sound of electricity rang in his mind.
[Demon Extermination System activated.]
[The host can obtain lifespan by slaying demons to cure illnesses, and can also use lifespan to learn Breathing Techniques and sword skills.]
"…"
Yasui Ryosuke's lips twitched. "System."
[Hm?]
"How long can I live?"
[Congenital liver failure, at most one year, hehe~]
"Hehe your sister!"
Yasui Ryosuke was furious.
Damn it!
Me?
Use this sickly body to kill demons?
Are you kidding?!
Not to mention he didn't even have a Nichirin Blade—just the lifespan cost alone was already unbearable!
What kind of system makes the host trade their life?!
Damn it!
Yasui Ryosuke roared, "How the hell am I supposed to kill demons with this body? Persuade them with kindness and make them slit their own throats?!"
[Host, don't panic. At least it's a liver problem, not a lung problem. You can rely on a stronger physique and Breathing Techniques to alleviate it a bit and die more slowly.]
"…"
Yasui Ryosuke nearly ground his molars to dust. "Damn you! What factory produced a system like you? I'm filing a complaint!"
Buzz buzz buzz—
The electric sound continued. The system played dead.
Fine!
You win!
Yasui Ryosuke spent a long time accepting reality.
What else could he do? Train, learn!
If he didn't kill demons, he would really die!!!
"Ahem!"
A deliberate cough sounded at the doorway, interrupting Yasui Ryosuke's complaints about the unscrupulous system.
He looked up.
An old man stood at the door, short in stature but exuding a steady aura.
He had white hair and beard, with a stern and fierce expression.
Most striking was the scar under his left eye, similar to Wolverine's, and the prosthetic attached to his missing right leg. He supported himself with a wooden cane.
Kuwajima Jigoro.
The former Thunder Hashira of the Demon Slayer Corps and a trainer.
The master of Agatsuma Zenitsu and Kaigaku.
"You're awake?"
Kuwajima Jigoro spoke with concern, though more sternness than warmth. "You've got a tough life, kid."
"Thank you, senior, for saving my life."
Ryosuke stood and bowed, but his body was weak, making his movements somewhat clumsy.
"Hmph!"
Jigoro approached with his cane, his gaze sharp as a blade as he examined Ryosuke.
"This body of yours… it's like rotten wood hollowed out by worms. A mere breeze could knock you over. You're weaker than this old man. Congenital liver exhaustion, severe deficiency of vital energy and blood—being alive until now is already a miracle."
Yasui Ryosuke: "…"
That hurts, old man!
Was there really a need to emphasize that now?!
"Was it from birth?" Jigoro asked.
"Yes."
"Hmm—"
Jigoro frowned deeply. "The physicians of the Demon Slayer Corps can help you recover somewhat and extend your time."
Hearing this, Yasui Ryosuke laughed bitterly inside.
Based on the original host's memories, this should be the late Meiji period, about ten years earlier than the original timeline.
Shinobu and Kanae were still little kids, and the Butterfly Estate hadn't even been established yet!
Recovery? What recovery!
Let alone curing congenital organ failure with the current level of medical technology.
That was simply impossible.
As for becoming a demon…
Heh—
That scumbag boss Muzan offered no salary, no benefits, and randomly eliminated subordinates. Even modern black-hearted capitalists would praise themselves as kind compared to him.
Even if Yasui Ryosuke wanted nothing and only admired his elegant female disguise.
Once Muzan saw Ryosuke's memories, he would learn the location of the Blue Spider Lily.
With Muzan's personality, after achieving his goal, he would most likely crush Ryosuke to death.
If I'm not even afraid of sunlight anymore and become a Jo-level lifeform, why would I need you demons?!
The path of becoming a demon was completely impossible. Rejected.
The current situation was that if Yasui Ryosuke didn't kill demons, he would die! Cremated in one year!
Using lifespan through the system was the only way for him to survive!
The intense desire to live and the sense of crisis washed away all of Ryosuke's hesitation and wishful thinking.
Seeing the changing expressions on Ryosuke's face, Jigoro assumed he was in despair and was about to say something like "cherish your remaining time."
Yasui Ryosuke moved.
He slowly supported himself up and bowed ninety degrees to Jigoro.
"Coach! I want to play basketball… uh, no!"
Realizing he had spoken in the wrong context, Yasui Ryosuke corrected himself.
"Senior! I want to slay demons! Please teach me!"