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I didn't do anything—
I originally thought the little girl from Konoha was an exception, but I didn't expect the Demon Slayer World to be even more so.
— — — —
On a bustling street, a boy with a scar on his head was screaming hysterically at a man in a suit and fedora.
"Muzan Kibutsuji, I will never let you go! No matter where you go, I will pursue you to the ends of hell to take your head! I will never forgive you—"
However, although he shouted this, his body didn't chase after him, because he was desperately holding down a man.
This man had just scratched his wife because Muzan Kibutsuji had grazed his neck as he passed by, injecting a bit of his Blood Demon King's blood.
Immediately, the man's eyes turned bloodshot, and he writhed on the ground in agony, then, in the process of transforming into a demon, he even tried to eat his own wife.
To prevent casualties among the crowd on the street, the kind boy had no choice but to give up chasing Muzan Kibutsuji, even though he was the enemy who had murdered his entire family.
"Hey, hey, let go of that man, or we won't be polite!" The police, who had rushed over upon hearing the commotion, didn't know about demons and only saw the man's wife lying in a pool of blood.
Seeing the boy struggling with another ferocious-looking man, they grabbed their batons and were about to step forward to pull them apart.
"Sorry, I can't let him go. No one but me can restrain him, or more people will get hurt." The boy was anxious. How could he explain?
"No one here but me can stop him. Please don't come over, just go!"
Just as the boy was at a loss, a gentle and pleasant voice came from the crowd.
"Blood Demon Art ~ Bewitching Blood, Visual Dream Fragrance."
The people on the street suddenly saw scenes of flowers flying everywhere, and everyone fell into an illusion.
"Ah, ah, what is this?"
"Nani ~ What's going on? Why are there flowers everywhere?"
The boy stared intently in one direction, because a woman in a kimono and a boy follower were slowly approaching from there. Their scent—they were demons.
"Let me help you," the woman in the kimono said gently.
"This scent... you're a demon?!" the boy with the scar on his head exclaimed in surprise.
"That's right, I am a demon, and also a doctor. My name is Tamayo—"
[Her scent is pure, she is not lying]
An hour later, in Tamayo's house, the wife who had been scratched by the demonized man was lying asleep on the sickbed.
"Excuse me, that lady, she...?" the scarred boy asked.
Tamayo said regretfully, "She's fine, but her husband..."
"Although I feel very bad, her husband has been tied up and locked in the dungeon by us..."
Tamayo stood up and said to the boy, "Let me introduce myself. My name is Tamayo, and he is Yushiro. We are both demons. Because of our profession as doctors, we only need a very small amount of blood to survive, so we don't need to eat people."
"Oh, sorry, my name is Tanjiro Kamado, and this is my sister, Nezuko. She is also a demon." The boy, Tanjiro, stood up, released his sister from his wooden box, and introduced her.
"I believe you are not demons who kill innocent people indiscriminately, because you have a clear scent on you that holds no lies. By the way, Miss Tamayo, do you have a way to turn a demon back into a human? My sister Nezuko is also a demon, but she hasn't eaten anyone. I'm searching everywhere for a way to restore her to human form."
This was his special ability, a miraculous sense of smell that could not only detect various scents but also the scents of various emotions.
Tamayo pondered for a moment and said, "For so many years, I have also been searching for a way to turn demons back into humans. Unfortunately, I haven't been able to collect enough demon blood, otherwise, I might be able to research an antidote. Yushiro is the only child I've transformed into a demon in two hundred years."
Young Tanjiro was shocked, "Two... two hundred years? May I ask how old you are?"
Yushiro, standing nearby, immediately became furious and punched Tanjiro in the stomach, "You scoundrel! Don't ask a lady her age!"
Nezuko looked at her brother, then at them, with a blank expression, then boredly lay on the ground, rolling around. While they were chatting in the clinic, two demons were chasing the scarred boy, Tanjiro, along the street, because this was an order from their leader, Muzan Kibutsuji.
These two, a man and a woman, the man had eyes on his palms, and the woman had several arms, each holding a ball... "Ah, the medicine is used up, Nagi-kun. I'm going to Doctor Tamayo's place to get some medicine." The girl, Kagome, shouted into the basement, then skipped out.
Uchiha Nagi, who was conducting an experiment, responded, but for some reason, after the girl left, he felt restless and uneasy, even knocking over several test tubes while experimenting.
"What's wrong? Why do I feel uneasy, yet there's no danger?" Uchiha Nagi's hand, holding a test tube, paused, and he frowned.
He took a deep breath, calmed himself, and continued the experiment, still feeling a strong sense of irritation in his heart.
"Hmph~" Uchiha Nagi put down the test tube in his hand and walked out of the basement to get some fresh air.
Night fell, and the surrounding area was already lit up with countless lights. Human settlements with electricity looked incredibly brilliant, as if he had returned to modern times... "It's already night, the daytime in autumn and winter passes so quickly..." Uchiha Nagi looked at the sky; it was already dark. Wait—
He suddenly remembered where his unease came from. This peaceful world had no Ninja, but there was a type of creature that could only appear at night—demons.
After activating his Mangekyo, Uchiha Nagi's mental power was incredibly strong. He confirmed that his restlessness wouldn't come without reason, which could only mean there was danger.
Kagome was in danger—
Thinking of this, Uchiha Nagi suddenly opened his eyes, and the three tomoe appeared in them.
Whoosh—the next second, he leaped onto a rooftop and vanished.
"Seventh Form: Dropping Ripple Thrust. Curve."
The protagonist of the Demon Slayer World, Tanjiro, was using Water Breathing to battle two demons who had tracked his scent to Tamayo's house.
They were a man and a woman, subordinates sent by Muzan Kibutsuji to hunt him.
"It's an honor for you to be killed by me, one of the Twelve Kizuki! Come on, let's play until dawn, hahaha!" The six-armed woman laughed excitedly.
"Hey, Zhu Sha Wan, remember not to smash the head of that boy with the hanafuda-like earrings. We need to take it back to report. Tsk~ so unappetizing." The other man held a pale arm and bit into it with a mouth that split to his ears.
"Why does the ball curve~?" Tanjiro asked, puzzled. The female demon in front of him threw balls with immense power, but what he couldn't understand was that the balls would also curve to attack them.
As a result, they were incredibly powerful, like self-guided missiles. Tanjiro was overwhelmed; just dodging them was difficult, let alone cutting off their necks.
"You—you even killed someone!" Tanjiro was furious. The hand the other demon held was still dripping blood, clearly freshly killed.
"This? Heh heh, we encountered her on the way. She seemed to be looking for that traitor Tamayo. Seeing she was young, I ate her on a whim. Didn't expect her flesh to be so unappetizing." The demon man, Ya Habaki, who had eyes on his hands, cursed.
Tanjiro was enraged and was about to use [Sixth Form: Twisting Whirlpool Flow] to deal with the opponent, but a cold, emotionless voice suddenly came.
"I'll handle this man..."
— — — —
Under the dim starlight.
Scattered on the ground were remnants of torn clothes, and besides the bloodstains, only a head remained.
There was also a basket on the ground, meant to carry medicine from Tamayo's place, but now it lay alone to the side.
Uchiha Nagi's trembling hand reached for the head, brushing aside the hair on its face. It was Kagome... This girl, whom he had known for only a few days, had already fallen into eternal sleep here. A cheerful smile still adorned her face, which was probably the only good news, as she likely died without feeling any physical pain.
Uchiha Nagi's hands trembled incessantly, as did his shoulders and legs.
It wasn't fear, but rage—so much rage that his body trembled uncontrollably.
Suddenly, he lifted his head, and the three tomoe in his eyes had transformed into the plum blossom pattern of the Mangekyo Sharingan.
The Mangekyo spun continuously, and vast ocular power surged forth, emitting an evil and powerful aura—