"Damn it!"
"Where the hell have I been sent?"
"Is this even still inside the country?"
Before Yasui Ryosuke could even react, a massive flood of memories forced its way into his brain, churning madly.
The Meiji Era. Legends speak of evil demons that eat people at night.
There are also legends of Demon Hunters who formed the Demon Slayer Corps to behead these demons and protect humanity.
...
This is the Hashira Extinc... cough, cough, the Demon Slayer: Kimetsu no Yaiba world?!
Are you kidding me?!
Yasui Ryosuke was ready to first cry, second scream, third Mikami Yu...
No, wait, he was heartbroken.
Absolutely heartbroken!
Look, bro, I haven't even spent the hundred thousand Primogems I saved up yet!
Konoha Village has no one to guard it anymore!
I didn't even get a chance to equip my legendary gear!
I haven't deleted the several terabytes of "study materials" on my computer!
The browser history on my phone, those random sketchy apps, and games like "Agents" and "Beautiful World" haven't been formatted yet!
If the cops crack my phone password...
"There goes my reputation!"
Yasui Ryosuke howled at the sky.
He was a bright and upright flower of the motherland, doing good deeds every day. He didn't win the lottery, so why did staying up late for one night get him conscripted into this place?!
However, facts proved that staying up late really does cause sudden death.
Are transmigrations really this aggressive regarding quotas nowadays?!
Good news: Yasui Ryosuke has read the original work in great detail.
Bad news: He is about to die.
"Pfft!"
A tearing pain ripped through Yasui Ryosuke's body.
He couldn't control the spasms seizing his body as he violently vomited fresh blood.
Damn it!
The original owner of this body was a sickly invalid with not long to live. His parents were both eaten by demons, and he was saved by a fierce-looking, one-legged little old man leaning on a cane.
"I'm already this miserable... System-bro, stop hiding!"
Yasui Ryosuke cried out in pain.
Sizzle—
The sound of an electric current rang in his mind.
[Demon Slayer System Activated.]
[Host can obtain lifespan to cure chronic illnesses by beheading evil demons. Lifespan can also be used to learn Breathing Styles and Sword Techniques.]
"..."
The corner of Yasui Ryosuke's mouth twitched. "System."
[Hmm?]
"How much longer do I have to live?"
[Congenital liver failure. At most one year. Heehee~]
"Heehee my ass!"
Yasui Ryosuke was furious.
What the f—
Me?
Use this sickly body to go behead demons?
Are you playing with me?!
Leaving aside the fact that he didn't have a Nichirin Sword, this lifespan point system was a pain in the ass!
What kind of 'good' System asks a host to burn their own lifespan (pay-to-win)?!
I'm done for!
Yasui Ryosuke roared in anger, "How the hell am I supposed to kill demons with this body? Kill them with kindness? Talk them into slitting their own throats?!"
[Host, do not panic. At least it is a liver problem, not a lung problem. You can still rely on a strong physique and Breathing Techniques to alleviate it. You will die slower.]
"..."
Yasui Ryosuke ground his back molars so hard they nearly shattered. "Motherf... Which factory produced you? I want to file a complaint!"
Zzzzt—
The current continued; the System played dead.
Fine!
You win!
Yasui Ryosuke took a moment to accept reality.
What else could he do? Train! Learn!
If he didn't kill demons, he really would die!!!
"Ahem!"
A deliberate cough sounded from the doorway, interrupting Yasui Ryosuke's denouncement of the unscrupulous System.
Ryosuke looked up.
Standing at the door was an old man. Though short in stature, he exuded a calm and steady aura.
He had white hair and a white beard, with a stern and fierce face.
Most striking was the scar running under his left eye, identical to Wolverine's, and the prosthetic limb on his missing right leg, supported by a wooden cane.
Jigoro Kuwajima!
The former Roaring Hashira and Cultivator of the Demon Slayer Corps!
The master of Agatsuma Zenitsu and Kaigaku.
"Awake?"
Kuwajima Jigoro spoke with concern, but mostly with sternness. "You're a tough kid."
"Thank you for saving my life, Senior."
Ryosuke stood up to bow, but his body was weak, making his movements somewhat clumsy.
"Hmph!"
Jigoro walked a few steps closer with his cane, his gaze sweeping over Ryosuke like a knife.
"This body of yours... it's like rotten wood hollowed out by termites. It would fall with a single gust of wind. You're weaker than this old man. Congenital liver failure, deficient in both Qi and blood. It is a miracle you have lived this long."
Yasui Ryosuke: "..."
That hits hard, old man!
Was there really a need to emphasize that right now?!
"Is this from birth?" Jigoro asked.
"Yes."
"Hmm—"
Jigoro furrowed his brows tightly. "The doctors in the Demon Slayer Corps can help you manage it and drag it out for a bit longer."
Hearing this, Yasui Ryosuke smiled bitterly in his heart.
Based on the original owner's memories, it should be the end of the Meiji Era right now, about 10 years earlier than the original timeline.
Shinobu Kocho and Kanae are still little brats; the Butterfly Mansion hasn't even been established!
Manage it? Manage my ass!
Let alone trying to cure congenital organ failure with the current medical standards?
That was simply impossible.
As for turning into a demon...
Heh—
Scum Boss Muzan offers no wages, no social security, and lays people off at the drop of a hat. Modern corrupt capitalists would call themselves saints if they met him!
Even if Yasui Ryosuke wanted nothing and just wanted to admire Muzan's female form...
Once that Scum Boss peeked into Ryosuke's memories and found out where the Blue Spider Lily was...
Given Muzan's personality, after achieving his goal, he would mostly likely crush Ryosuke instantly.
I'm not afraid of sunlight and I've become the Ultimate Lifeform, what the hell do I need you bunch of demons for?!
The demon path was completely blocked. Direct pass.
The current situation was: If Yasui Ryosuke didn't kill demons, he would die! Direct cremation in one year!
The System's "burning lifespan" mechanic was the only way for him to survive!
An intense will to survive and a sense of crisis washed away all of Ryosuke's hesitation and hopes for a fluke.
Jigoro watched the changing expressions on Ryosuke's face, thinking he was in despair. Just as he was about to say something like "cherish the time you have left"...
Yasui Ryosuke moved.
He slowly propped up his body and bowed ninety degrees to Jigoro.
"Coach! I want to play basketba... uh, wrong!"
Yasui Ryosuke, who had switched to the wrong channel, spoke again.
"Senior! I want to slay demons! Please teach me!"