Demon Slayer: You can become stronger by swinging your sword

Feng Yu sat on the bed and looked at Butterfly Ninja, who always had a sweet smile on his face, and couldn't help but think of watching the anime prequel about her, Kanae, and Kanae in his previous life. →

The girl used her smile to hide her inner pain.

She is not suitable to be a demon-slayer swordsman because her wrist is not strong enough and she is the only one in the Demon Slayer Squad who cannot cut off the demon's head. However, in order to avenge her sister, she found another way and used her proficiency in pharmacology and toxicology With his own advantages, he developed poison that can kill ghosts to make up for his shortcomings.

She also created her own set of breathing, the breath of insects. She is a genius and a sad person.

Butterfly Ren was once serious, unsmiling, and outspoken, with a competitive and irritable side. After the death of her sister Chanae Butterfly, Shinobu's whole person changed a lot. She completely imitated her sister's behavior, tone and personality, always maintaining a calm side, and she also began to smile like her sister all the time.

Butterfly Ninja will show no expression when angry or serious. When she is angry, she will ask herself that "the inability to control emotions is a sign of immaturity." She will try her best to control her expression and calm down as much as possible.

Feng Yu also knew at this moment that the butterfly ninja was trying to use himself as a container to inject poison, hoping to kill the two children together.

Feng Yu admired her courage, but he also thought she was stupid. People have hope while they are alive, and even if the hope is slim, they should learn to protect themselves first.

Feng Yu knew why she just wanted him to show her two breathing techniques.

It's just that he wants to become stronger and have a higher winning rate against Tongmo in the future.

"No matter what, if you can reduce the tragedy a little bit more..."

Feng Yu sighed and then came to the martial arts training square.

In the center of the square, Butterfly Ninja was already waiting here.

"Feng Yujun, you are here..."

Butterfly Ninja said with a smile.

"Butterfly... endure..."

"Feng Yu-kun, do you have anything to say to me?"

The butterfly ninja's expression suddenly turned cold when he saw Feng Yu's hesitant expression.

"No……"

How dare Feng Yu admit it? Seeing the smile on Butterfly Ninja's face again, he couldn't help but shudder.

"Then Mr. Feng Yu, please tell me how you achieve the two breathing methods..."

"Actually... I don't know why I can master the two breathing methods. I just suddenly realized it..."

Feng Yu couldn't explain why. In the final analysis, it was because of his own body.

The body's resilience is so strong that it is not afraid of irreversible damage caused when switching between the two breathing methods.

"Maybe it's because of my physical condition..."

Feng Yu then explained.

"So that's it..."

The Butterfly Ninja looked at Feng Yu with a thoughtful look on his face.

"Feng Yu-kun, can you show me your own breathing method?"

The Butterfly Ninja requested.

"Can!"

Then Feng Yu began to show the butterfly ninja the two moves of Breath of Light.

"Full concentration, Breath of Light Type 1 Moonlight Slash..."

"The Breath of Light II, the radiance of the world"

"These are the two moves I have researched so far..."

Feng Yu said after showing it.

"It's incredible, Mr. Feng Yu, your second move actually made me feel the warmth of the sun..."

"And this intense light might make it surprisingly difficult to fight ghosts!"

The Butterfly Ninja said with a surprised expression on his face.

"Feng Yu-kun, can you show me how you can transform your water breath into light breath again?"

"Yeah, okay"

Then Feng Yu first used the breath of water, and then transformed into the breath of light.

The two breathing methods transform each other.

The butterfly ninja looked at it very seriously.

The smile on his face also faded a lot, and his gaze remained on Feng Yu's face.

"Hoo~"

After showing off, Feng Yu let out a breath of turbid air.

"It's very powerful, Feng Yu-kun. None of us in the Demon Slayer Corps can transform breathing techniques without harm like you."

Butterfly Ninja praised.

"Feng Yujun, how does your body feel when you are transforming the breath of light?"

The Butterfly Ninja asked again.

"Do you feel it...it just feels like a little discomfort...and a little damage to your body..."

Feng Yu answered truthfully.

The Butterfly Ninja nodded in approval. After all, the Demon Slayer Corps had once verified whether one person could learn two breathing techniques or more.

but

Basically they all end in failure, and the biggest difficulty is discomfort.

Hashira of the Demon Slayer Squad can also learn two breathing techniques, but not only will his strength not be improved, but his body will be dragged down.

What the Demon Slayers want is to improve their strength, not decrease it.

The Butterfly Ninja circled around Feng Yu, and then suddenly pulled out a knife and gently scratched Feng Yu's skin.

"As expected..."

The Butterfly Ninja saw that the bleeding area where he had just scratched his skin quickly became scabbed and healed.

"It seems that Mr. Feng Yu has a very special body..."

Butterfly couldn't help but touch the scabbed area.

With a light touch, the scab fell off, revealing new skin without any wounds.

"Feng Yujun, are you thin-blooded?" 🄲

Butterfly asked nonchalantly.

"Thin blood...I don't know..."

Feng Yu pretended that he didn't know whether it was thin blood. After all, his physique was an ageless constitution that was even more powerful than thin blood...

Moreover, before this body gained the ageless physique, its recovery power was already astonishing, not to mention the various body-building techniques...

Just when Butterfly endured it, he still let go of his own defenses before slicing his skin.

Otherwise, the membrane cannot be cut with just that little strength.

The butterfly ninja's eyes were a little disappointed, but he still had a smile on his face.

"How about... take a look at this..."

Feng Yu can't bear it

He took out a marrow-cleansing pill from the system space and put it in Butterfly Ninja's hand.

"Feng Yu-kun...is this?"

Butterfly Ninja was a little confused and looked at the small pill carefully.

"You will know the effect after you eat it... As long as you know that my body is so strong, it is due to it..."

Feng Yu didn't want to explain too much.

Butterfly put the Marrow Cleansing Pill into his mouth with hesitation.

"It's numb... This woman can look so beautiful in everything she eats..."

Feng Yu turned away and stopped looking at Butterfly Ninja.

"How could it be!"

Butterfly ninja let out a exclamation

His face instantly became excited.

Because she felt her body becoming stronger as she clicked.

"Fengyu-kun!"

"Where did you get this pill? Can you give me some more?"

"Or do you have a recipe for it?"

Butterfly Ninja asked excitedly.

"This elixir is called the Marrow Cleansing Pill... Where you got it is a secret of mine. I don't have much left. I can give you another one and let you study it..."

Feng Yu said.

"That's it...it's a pity...but it's already very good..."

Butterfly Ren suppressed her excitement, and then saw Feng Yu take out two marrow cleansing pills and put them in her hands.

"You can eat another one and keep the remaining one for research. I hope you can study its ingredients and then develop it on a large scale..."

Feng Yu said without blushing or heart beating.

"Fengyu-kun, is this the same quality as the elixir Mr. Linlong sent a year ago?"

"You mean the healing pill?"

Only then did Feng Yu remember that he had given the healing pill to Rintagaki Sakonji, but he had never thought that he had sent the healing pill to Butterfly Ninja.

"Sure enough, it was also done by Mr. Feng Yu..."

"Feng Yu-kun, I am very grateful to you here. Because of your healing pill, our Demon Slayer team has reduced casualties."

Butterfly Ninja bowed deeply for Feng Yu and said.

"You mean the healing pill was successfully developed?"

Feng Yu was a little unbelievable.

"Yes and no, Mr. Feng Yu, because we can only make elixirs with very weak effects, mainly because some of the ingredients in them seem to not exist in this world..."

As he spoke, he looked at Feng Yu with strange eyes.

"Feng Yujun is really a strange person..."

"You make me feel like you don't have the heart to sacrifice everything..."

Then Butterfly Ninja left with the Marrow Cleansing Pill. She wanted to quickly develop the Marrow Cleansing Pill and then mass-produce it.

After all, this elixir is really amazing. My originally dormant strength has improved a lot. Of course, the main reason is because my body is dirty.

Butterfly couldn't bear to be like this in front of Feng Yu, so she wanted to wash off the impurities on her body first.

"If it is developed...can I cut off the ghost's head..."

Feng Yu stood there and looked at the departing Butterfly Ninja, thoughtfully.

"I can't tell my secret, I'm sorry..."

…