Demon Slayer: Strength Gained with Every Swing of the Sword

Chapter 20: Chapter 21: The Mission Begins



Fourteen days had passed since Feng Yu completed his final trial.

That morning, Feng Yu began teaching Tanjiro swordsmanship.

After all, he knew that he was likely going to be gone for a long time to complete the mission assigned to him by the Demon Slayer Corps. Once he left, there would probably be no time to return.

Feng Yu held a deep fondness for the main character, Tanjiro. While Tanjiro could be a bit too idealistic and saintly in certain aspects, everyone had their own personality, and Feng Yu wasn't the type to scrutinize others too much. He simply fulfilled his responsibility as an elder disciple.

He also saw it as a way to lighten Urokodaki's workload a bit.

"Tanjiro, you're not exerting your force in the right place. It should be like this—hold the sword here…"

"Your stance is wrong too. Your base is unstable, and you're not applying enough force. Straighten your back…"

"You're too slow. Watch me closely and catch my point of force…"

Feng Yu kept adjusting Tanjiro's posture, constantly correcting him. He would demonstrate and then point out Tanjiro's mistakes.

"I didn't realize teaching someone would be so exhausting…"

"And it's really frustrating the more I teach. Sometimes I feel like I just want to beat him up myself…"

As he watched Tanjiro make another mistake, veins began to bulge on Feng Yu's forehead, and his face began to twist with anger.

"A good beating might actually do him some good. It'll help him remember his mistakes, and with the medicinal ointments from the master, he'll recover quickly…"

"But Urokodaki…"

Feng Yu glanced at Urokodaki.

Urokodaki knew what Feng Yu was thinking. He could only sigh and cast a helpless glance at Tanjiro before pretending not to notice.

In his heart, however, Urokodaki thought, Finally, someone understands the hardships of training a disciple…

Seeing Urokodaki's expression, Feng Yu's face slowly took on a more sinister look.

Tanjiro, who was practicing, felt a chill run down his spine and shivered.

"Danger… there's danger…"

Tanjiro warily glanced around. Only Feng Yu, holding a stick in his hand, was smiling as he walked toward him.

"F-Feng Yu… brother… What are you doing?"

Tanjiro could sense that there was something dangerous about Feng Yu's smile and couldn't help but speak up.

"Tanjiro, my younger brother, don't blame me. I went through this too, and that's why I improved so quickly… Hehehe…"

As Feng Yu came closer, Tanjiro suddenly shouted, "Urokodaki! Help! Feng Yu's going to kill me!"

"Hehehe, shout all you want. Even if you scream your throat dry, no one will save you. Be a good boy. I'm doing this for your own good, and it's a tradition in our line…" Feng Yu's voice was full of mischief.

Tanjiro's terrified expression did little to stop Feng Yu. In fact, it only seemed to amuse him, and his mood lightened, though he still wasn't going to stop punishing Tanjiro.

And so, for half an hour, the sounds of Tanjiro's anguished cries echoed throughout the entire Sagiri Mountain.

Inside the wooden house, Urokodaki, unable to bear the noise, shoved cotton into his ears and mumbled to himself, "I can't hear it, I can't see it…"

But despite the endless screams, the result was undeniable—Tanjiro was becoming more focused on his practice, dedicating himself to improving.

"Ah, now that's more like it. If only you'd done this from the start, Tanjiro. See? The purple and red marks on your body, your brother's heart aches for you…"

Feng Yu smiled broadly.

"Urokodaki taught you the same way, right? After all, geniuses are made under the stick. You're not like me with a 'golden finger' that can instantly make me strong. If I didn't have my 'golden finger,' I'd probably have gone through the same kind of torment you're facing now, but I have no complaints. This is a dangerous world after all…"

Feng Yu sighed, looking at Tanjiro's battered body.

Though he was a bit too harsh, the results were undeniable. Better for Tanjiro to become stronger now than face greater danger later when he undertook missions. That way, he could be better prepared for the powerful demons and suffer fewer injuries.

In Feng Yu's previous life, every time Tanjiro went on a mission, he returned covered in wounds. His injuries never healed before he was off to the next mission, and each new wound piled onto the old. Even a god would eventually suffer internal injuries.

"Tanjiro, do you blame me?" Feng Yu asked sharply.

"Brother, I don't blame you. I know you're doing this for my own good…" Tanjiro gasped, out of breath.

"Good. Tanjiro, remember this—no matter how badly you're hurt here, you won't lose your life. But once you leave this place, if your strength is weaker than a demon's or if you make one wrong move, death is waiting for you!"

"Think about your sister. What is your true wish?"

Feng Yu's words made Tanjiro fall into deep thought.

"My wish… my wish is… to restore Nezuko to her human form!"

"That's right. My wish is to restore Nezuko to her human form!" Tanjiro shouted with renewed determination.

"Good. Never forget that wish. But right now, you're still too weak. You must be strict with yourself and tough on yourself. Otherwise, you might never see the day when your sister turns back into a human."

"Do you understand?" Feng Yu asked.

"I understand!" Tanjiro shouted. Since Feng Yu's return, Urokodaki's attention had been on Feng Yu, and Tanjiro had become a bit lazy with his training. Now, however, Tanjiro was filled with shame and gritted his teeth, pushing himself harder.

Seeing this, Feng Yu understood that Tanjiro had finally returned to the mindset he had in his previous life.

Feng Yu entered the house and sat cross-legged next to Urokodaki.

"This kid, Tanjiro, has been slacking off a bit these past few days," Feng Yu remarked.

"You've done well…" Urokodaki said.

"Yeah, I guess this is something I had to do before I leave on my mission…" Feng Yu replied.

"Dealing with demons is always full of danger and misunderstanding, Feng Yu. When that time comes, I hope you'll help him. Don't let this kind-hearted boy lose his spirit…" Urokodaki said, his voice tinged with worry.

"I will, Urokodaki-sensei," Feng Yu nodded, looking at Tanjiro practicing hard outside.

"That's good. That's good…" Urokodaki sighed, a rare sadness in his tone.

The two fell into silence.

At that moment…

"Wah… wah…"

The sound of crows calling echoed.

Soon, a small black crow flew into the wooden house and called out to Feng Yu, "Feng Yu of the Nakagawa clan, you have received orders. Proceed to the southeast town. People have been disappearing there—someone, or something, is behind it. Investigate the town, locate the demon lurking there, and kill it. Be careful!"

"This is your first mission as a demon slayer!"

Feng Yu nodded and gripped his Nichirin Sword tightly. However, Urokodaki fell silent.

At that moment, Feng Yu's system emitted a faint sound… 

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