Fox Demon: Heaven rewards diligence; I will eventually achieve divine mastery of martial arts.

"It's Kurihana Kanao!" Kanao spoke up.

Tanjiro Kamado nodded, not delving too deeply into the other person's emotions, and went into the room.

Kanao's eyes held a complex expression.

In the past two months, she had actually visited Tanjiro Kamado several times.

But whether it was a coincidence or not, every time she went to the door, she could see Kamado Tanjiro digesting the effects of the medicine.

As a member of the Butterfly Mansion, she naturally found out very easily how much medicine Tanjiro Kamado had used over the past two months.

She had no idea how much suffering Tanjiro Kamado had endured.

But seeing the other person's expression, she ultimately didn't ask the question.

"He's focused on becoming stronger, I shouldn't bother him."

Kanao Tsuyuri sighed and followed Tanjiro Kamado inside.

The room was very dark.

Since Tamayo and Nezuko were there, there was basically no sunlight coming in.

The dim yellow light illuminated every inch of the room, and also fell on the girl not far away.

The girl's eyes lit up when she saw Tanjiro Kamado, and she bowed to him.

Tanjiro Kamado was also pleasantly surprised:

"Nezuko!"

"Sorry, Nezuko can't speak yet."

Shinobu Kocho spoke up, her eyes revealing undisguised weariness.

To be honest, researching how to kill a ghost is actually quite simple, but researching how to cure a ghost is a much more complex subject.

Even with Shinobu's pharmacological knowledge and Tamayo's years of experience treating demons, and with a general direction in mind, the two still encountered countless difficulties.

However, during this process, Shinobu Kocho completely let down her guard against Tamayo and Nezuko.

One is Tamayo's patience and gentleness, which makes Shinobu Kocho unable to see any negative emotions from the demons.

Nezuko is the same; her gentleness is different, very delicate, and makes people feel warm.

Shinobu got along very well with both of them, and the past two months had been quite happy, except for being a little tired.

"If all goes well, he will become no different from a normal person after the treatment."

Kocho Ninja Way, while Tamayo stepped forward and handed a vial of reagent to Kamado Tanjiro:

"Although you both agree, I want to say that the last ingredient is not a medicinal herb we know, but sunlight, so I hope you will think it through."

There was no weariness in Tamayo's eyes, or rather, when Tanjiro Kamado first saw her, he felt that she was always radiating a faint sadness.

And there is always a feeling that I am atoning for my sins.

Unfortunately, Tanjiro Kamado was unable to plant the seed of emotion within Tamayo, otherwise he would have been able to see Tamayo's emotional changes.

"Okay, I understand. Of course I believe you, and if Nezuko agrees, I believe she believes you too."

Tanjiro Kamado cleared his mind of his random thoughts and spoke.

He then handed the medicine to Nezuko, saying:

"Nezuko, I trust your choice. If you agree, then drink it yourself."

Nezuko took the potion, nodded to Tanjiro Kamado, then nodded to Shinobu Kocho and Tamayo, and without any hesitation, drank the potion.

The potion was all gone, and Nezuko looked at herself with some curiosity.

However, nothing changed, and at this moment Tamayo spoke:

"Go, go and bask in the sunlight. Only when your whole body is bathed in sunlight will it have an effect."

Nezuko nodded and glanced at Tanjiro Kamado.

Tanjiro Kamado nodded to her as well.

Nezuko smiled, and the light in her eyes became extremely firm.

She slowly stood up and walked towards the door leading to the outside world.

The dappled sunlight peeked through the cracks in the door, creating a dreamlike effect when mixed with the dim light.

Nezuko slowly inserted her fingers into the crack of the door, then suddenly pushed the door open.

The sunlight instantly divided the room into two spaces, and Nezuko was bathed in its warmth.

Everyone's hearts jumped into their throats, because success or failure hinged on this one move.

If she fails, death will be the only thing waiting for Nezuko.

However, when the sunlight shone on every corner of Nezuko's body, nothing changed.

Nezuko slowly turned around, looked at everyone, and smiled.

The crowd's expressions shifted from surprise to shock, and then to delight.

Successful.

Nezuko successfully transformed back into a human from a demon.

Tanjiro Kamado finally breathed a sigh of relief.

It's impossible for him not to be nervous.

But in the end, he still chose to believe Nezuko, after all, Nezuko herself made that choice.

All he could do was firmly believe in Nezuko.

Fortunately, Nezuko succeeded.

Tanjiro Kamado's eyes welled up with tears.

Finally, the tears slowly gathered and slid down his cheeks.

Master, Mother, and Shijuro—Nezuko has successfully turned back into a human.

Nezuko saw Tanjiro Kamado crying, opened her mouth, and made a soft sound from her throat:

"Brother... Brother, don't cry..."

His voice was broken and he sounded very unskilled.

However, as she spoke, tears welled up in her eyes, just like Tanjiro Kamado.

She walked up to Tanjiro Kamado and hugged him tightly.

The two siblings embraced and wept, the past two years seeming like a dream.

Now that nightmare is over, they are about to embrace a brand new life.

Shinobu Kocho, Tamayo, and Kanao Tsuyuri all couldn't help but smile as they watched the two embracing.

While everyone was still immersed in the warm atmosphere, no one noticed that a faint aura of passion was emanating from Tanjiro Kamado.

The emotional energy slowly dissipated into the air. Although it was shallow, it was continuous and spread outwards in all directions.

At the same time, Muzan Kibutsuji, far away in the Infinite Castle, seemed to sense something, and his pupils suddenly contracted.

An image slowly emerged in his mind.

It was a picture of a young girl walking towards the sunlight, basking in its warmth, and turning back with a radiant smile.

Memories immediately flowed through Muzan Kibutsuji's mind like a stream.

Then it slowly froze in a frame.

That was a scene from several years ago when he was experimenting with creating a ghost that could withstand sunlight.

He remembered that it was winter, and snow was falling from the sky when he stumbled into the home of a charcoal seller who lived in the mountains.

Then, without any effort, he injected his blood into the family.

Before long, these people could no longer withstand his blood and gradually died.

He remembered that the girl was one of them at the time.

"How can this be?"

Oniwu Tsuji Muzan muttered to himself.

"For hundreds of years, evil spirits that can resist sunlight have been born."

"Find her! We must find her!"

An impulse suddenly arose in Kibutsuji Muzan's heart.

But then he hesitated again. After all, with someone like Tanjiro Kamado around, he was afraid that he would be attacked by others if he went out.

His original strategy was to wait for Tanjiro Kamado to die before going out to take action, but he didn't expect Nezuko's appearance to disrupt everything.

After hesitating for a while, Muzan Kibutsuji's eyes hardened.

"No, I must get my hands on her."

Kibutsuji Muzanmei's crimson eyes flashed with an extremely cold light.