Start with Demon Slayer and create the strongest demon sword!.

Even Muzan may not be able to withstand Chidori.

This wave is an epic enhancement!

However, being strong by yourself is not enough. Only when everyone is strong can we be truly strong. Now we have to plan how to make Tanjiro stronger.

It would be better to develop the Fire God Kagura first for now.

……

As time goes by.

The next morning.

When the first ray of sunlight in the early morning shone on the earth, Tanjiro had already started today's training.

In the courtyard of the mansion, Tanjiro took deep breaths to keep his breathing method going, and ran in the courtyard carrying a huge rock.

This made Zenitsu and Inosuke's scalps tingle.

"This is not good. Tanjiro is trying too hard." Zenitsu opened his eyes wide and sat in the corridor in front of the room with a slightly shocked expression.

But considering Tanjiro's strength, I think this makes sense.

Although he also wants to become stronger, he wants to be self-disciplined.

Zenitsu could only say, "I can't do it..."

As for Inosuke standing aside, his answer was even simpler and more direct, with just two words.

Trash!

On the other hand, Tanjiro was exercising while concentrating on his breathing, but after a while he stopped and started breathing heavily.

The whole body began to tremble slightly uncontrollably.

"Just trying to keep my full concentration and breathing a little longer, my lungs felt like they were going to explode, and even my ears hurt like crazy."

Lin Fan, who was in the knife, could only comfort him, "It's normal to feel pain. Take a deep breath, let the air circulate to your fingertips, and improve your concentration as much as possible!"

"Ok!"

Tanjiro endured the pain and continued his training.

Time passes so quickly.

Waited until evening.

Lin Fan began to try to guide Tanjiro to learn Sun Breathing, but no matter what he said, it had little effect.

Tanjiro, who never understood the key, just kept apologizing, "Sorry, Ajuramaru, I'm too stupid and I can never learn it."

What can Lin Fan do? I feel helpless too.

"Since you can't learn it for now, then focus on the breathing method. Make sure you focus on your breathing when you sleep at night. I will supervise you."

Hearing this, Tanjiro was quite moved.

"Then I'll leave it to you, Ajuramaru!"

into the night.

When Tanjiro fell into a deep sleep, his original state of full concentration on breathing unconsciously ended.

Lin Fan released the black mist without hesitation and condensed it into a hand, then he went up and gave Tanjiro a big slap in the face.

There was a snap.

Simple, rough and direct.

Tanjiro sat up abruptly and turned his head quickly to look around.

"What happened?"

Zenitsu and Inosuke beside him were sleeping so soundly that they showed no signs of waking up.

And Lin Fan reminded.

"Your breathing was disordered just now, get up and go back to sleep."

"Ah? Thank you for reminding me..." Tanjiro was confused. He was slapped in the face by his own knife, but he still had to say thank you.

Is this justified?

I had no choice but to continue sleeping, but I couldn't keep breathing and soon my breathing became disordered again.

Lin Fan had no choice.

He could only release his ghost power and condense it to attack, and then give him a big bidou.

Snapped!

Tanjiro sat up feeling aggrieved and helpless. To be honest, he didn't really want to sleep anymore. "Sorry, my breathing was disordered again just now. I'm really sorry to bother you, Ajuramaru."

"You are my sword master, so it's all my duty." Lin Fan answered naturally.

Next to him, Zenitsu had actually woken up with his eyes closed, but he didn't dare to speak at all.

If you tell me, others may not believe it.

I woke up in the middle of the night and suddenly saw a knife slapping Tanjiro in the face.

Tanjiro is still saying thank you...

This is absolutely terrifying!

Lin Fan was almost busy that night. Not to mention Tanjiro, he even consumed a lot of energy just slapping his own mouth.

You have to expend extra ghost power to help Tanjiro with his treatment.

Otherwise, tomorrow morning.

Tanjiro's face was swollen even bigger than Inosuke's pig headband.

The next morning.

Tanjiro got up with dark circles under his eyes, and the first thing he did was to practice breathing techniques.

From sunrise to sunset.

By constantly honing yourself, you will gradually begin to transform yourself. This is not a direct improvement like feedback, but another kind of reward that is unique to training.

The most prominent of these is the soaring physical strength.

Zenitsu and the other man were still watching Tanjiro training in the corridor, with no motivation to join in.

But during training.

Lin Fan also reminded deliberately.

“A person doesn’t have to master only one breathing method. You can learn multiple breathing methods to coordinate with each other or even integrate them together.

That guy named Zenitsu, his lightning breathing is pretty good, you can go and ask him about it."

"I see."

Tanjiro was thinking while exercising, then he put down the huge rock on his body and trotted to Zenitsu in the corridor.

He bowed slightly.

"Zenitsu, can you teach me the Breathing of Thunder?"

"what?"

Zenitsu was a little confused and his expression was a little stiff.

He didn't speak for a long time.

It’s not that I don’t want to teach you, it’s mainly because I only know one damn trick.

But looking at Tanjiro in front of him, he still relented, "Well... it's not impossible, but I've agreed in advance that I only know the first form of Thunder Breathing, and I can't teach the others."

"Really? Thank you so much, Zenitsu."

Tanjiro didn't pay any attention to what was said later and walked up to him and thanked him with a smile.

Inosuke followed suit.

"Why don't you learn the Breath of the Beast from me! My Breath of the Beast is the strongest!"

Tanjiro just smiled and started chatting with Zenitsu.

All he could hear was Zenitsu sitting in the hallway, reminiscing about the time when he was honing his Lightning Breathing, and thinking back to the old man.

"Tanjiro, when using Thunder Breathing, you need to focus your attention on your feet. You can't accurately grasp your body shape and muscle size.

Only when you understand it can you truly master the Breath of Thunder. This is what my grandfather, who raised me, often told me. "

Tanjiro was a little confused, but he still studied hard.

After all, learning a breathing method is not something that can be mastered overnight. It took him several years to learn and master the water breathing.

……

Three days passed in the blink of an eye.

At this moment, Tanjiro's breathing time with full concentration is getting longer and longer, which directly leads to a rapid increase in basic physical strength.

Maybe he was moved by Tanjiro.

Even though Zenitsu and the other guy were reluctant, they would occasionally follow along for the training.

The days passed so peacefully.

But Lin Fan knew that Muzan would definitely not just sit there and do nothing, and he probably had ghosts looking for them nearby all day long.

Days like this probably won't last much longer.

Storm is coming.

This is just the last calm before the storm.

Lin Fan saw it very clearly.

And the result was just as Lin Fan expected, after sunset on the fifth day.

Night is falling!