Demon Slayer: Strength Gained with Every Swing of the Sword

Since the battle at Mount Tiancheng, Feng Yu had been staying in Qingyuan Town for a month.

During this time, he had gradually recovered, transitioning from the intense focus on his spiritual power research to his current routine—wearing simple clothes every day, fishing by the Qingyuan River.

The gentle breeze brushed his face, causing ripples to form on the clear waters of the river.

"After researching for half a month, this state seems to be the 'transparent world' described in the original text..."

At this moment, the world before Feng Yu had completely changed. The flow of time around him seemed to slow down, his mind completely clear of distractions. The world itself appeared transparent, allowing him to see everything—living creatures, objects, and any other special things—down to their essence.

Whenever he wished it...

He could obtain all the information about any object.

For instance, the fish swimming beneath the river's surface—whenever Feng Yu wanted, all the information about the fish from birth until now would instantly be available to him.

But maintaining such a state was highly taxing on the body. Even with his strong physique, Feng Yu could only sustain this state for about an hour.

After precisely hitting the one-hour mark, Feng Yu noticed that it seemed he could maintain the transparent world for longer now.

"Is it because my body has become accustomed to it, or have I grown stronger?"

Feng Yu quietly gazed at the calm surface of the lake.

Suddenly, his fishing rod trembled. With a light flick, a blue fish flew into the air, tracing a perfect arc.

Feng Yu watched the struggling fish land on the ground, then gently picked it up and released it back into the water.

"Everyone calls me a weirdo, but I think you're the real weirdo. You caught the fish, and then let it go! Are you crazy?"

A little girl's voice came from behind him.

"So you've come," Feng Yu smiled.

"You know me?" The girl jumped down from a tree and asked in confusion.

"Yes, I do," Feng Yu replied, his gaze steady on her.

The girl had bright green eyes, clear and sparkling like stars. She wore her hair in two pigtails, and her oval face framed by light bamboo-like eyebrows. Two small tiger teeth and dimples added to her cuteness.

"I not only know that you've been secretly watching me for over ten days, but I also know your name, where your home is, and how many people are in your family!"

Feng Yu smiled.

"I don't believe you. Tell me my name then!" the girl said, her face flushed with defiance.

"Your name is Nanako. You're already ten years old, and everyone at home calls you 'the monster.' Also..."

"Stop, stop, stop! Don't say anymore!" Nanako hurriedly interrupted.

"Hey, who are you, and how do you know all this about me?"

"You aren't some kind of pervert, are you?" Nanako covered her mouth, staring at Feng Yu in shock.

Feng Yu smiled faintly.

"It's nothing special. If you want to know, you can. Because the light in this world is everywhere..."

Nanako didn't understand what Feng Yu meant, but she could feel that at this moment, he seemed different—almost terrifying—as though she were completely exposed in front of him.

Nanako looked at him in fear.

"You... you..."

Her legs trembled, and she collapsed weakly to the ground.

"I know you've been stealing to treat your mother's illness, but have you ever thought about what happens to the people who are stolen from?" Feng Yu said.

"What do you know!" Nanako shouted, tears streaming down her face.

"People like you, rich families, can never understand our lives. We fight every day just to survive. You don't understand..."

Sighing deeply, Feng Yu took a stack of money from his pocket and placed it in Nanako's hands.

"Take this and use it to treat your mother. Don't do such things again."

"You... you're really giving this to me?" Nanako blinked, her face filled with disbelief.

"Yes, take it. But promise me you won't do any more sneaky things."

Feng Yu gently wiped the tears from her face before packing up his fishing rod and leaving.

Watching Feng Yu walk away, Nanako whispered a "thank you," only loud enough for herself to hear.

Feng Yu knew that because of Nanako's unusual eye color, she had been treated as a monster all her life—a child of demons. Her father, unable to accept her existence, had chosen to take his own life.

Since then, it was her mother who had raised her, but a woman with a child had little chance of surviving in such a world. So, her mother resorted to selling her body to make ends meet.

But this led to her mother contracting a virus—syphilis, as it was known in the previous life.

After contracting the virus, her mother had grown weaker and weaker, her condition deteriorating daily. When the townsfolk found out, they shunned her even more, even driving them away.

Left with no choice, the mother and daughter could only live in a dilapidated house outside the town.

Nanako's mother couldn't move much, so Nanako had to beg in town. But the people there still remembered her, for her striking green eyes were unforgettable.

The townsfolk believed that she too had contracted the disease, that she was dirty, the embodiment of evil. Not a single person ever offered her food or money.

Seeing that her mother would not survive much longer without treatment, Nanako resorted to stealing.

Using her extraordinary speed, Nanako would quickly snatch money or food and run, disappearing before anyone realized what had happened.

Thus, Nanako barely managed to buy some medicine to treat her mother.

It was ten days ago that Nanako spotted Feng Yu fishing by the Qingyuan River.

Seeing his clean, fine clothes, she immediately assumed he was wealthy, but struggled to find an opportunity to steal from him.

What intrigued her most, though, was the fact that Feng Yu, after catching fish, would always release them back into the water. She couldn't help but mutter under her breath every time she saw him do this.

Yet, sometimes, Feng Yu would deliberately toss the fish near her and say, "This person is just strange."

Over time, Nanako became deeply curious about him, unable to understand why he behaved this way.

The only conclusion she could draw was that Feng Yu was either a fool or a weirdo.

Looking at the money in her hands, Nanako hurriedly ran toward the medical clinic in town.

But little did she know, an unexpected visitor had arrived at her home... 

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