Invincible in the world, starting with the ghost curse

Are the raw materials ghosts? Ghost cells possess tremendous vitality. Remove the ghost elements, and only the vitality remains. It seems simple, but it is actually quite difficult to operate. These two people are worthy of being the ones who can combine forces to create a nearly fantastical human transformation drug.

Soon, the messenger crows flew to every swordsman with stripes, carrying medicine.

“Open the panel!”

Name: Seiichi Kamiya

Strength: First level, extreme

Spiritual power: 250/250 (the limit of humans in this world)

基础技能：日语精通（2500/7500）、剑术—宗师（5万/10万）、医毒圆满（0.1万/10万）

超凡能力：极阳呼吸法—全集中·极（破限）、日之呼吸—全集中·极（破限中2万/50万）、赫刀—破限、通透世界—圆满（60000/10万）、呼吸法融合术—熟练（1万/20万）、呼吸法（展开）

Temporary Talent: Almost Tao

Evaluation: First-level Supreme!!!

After the Yang Breathing broke through its limit, it became the Extreme Yang Breathing Technique. During the Battle of Infinite City, Kamiya Seiichi attempted to combine it with the Sun Breathing, and the result was a miraculous reaction. The red sword turned into blue fire, and a lotus mark appeared in his eyes.

It's very similar to Tanjiro's, but it's not the Crimson Lotus Breathing, but a different variation. Does fusing the Sun and Yang Breathing differ depending on each person's individual characteristics?

The red lotus may be the symbol of the destiny of this world, and it belongs only to Tanjiro.

During this period, Kamiya Seiichi's medical and poison skills made rapid progress through frequent exchanges with Kocho Shinobu and Tamayo.

His swordsmanship had probably already reached its limit, and it was difficult to achieve further breakthroughs in this world. Kamiya Seiichi planned to use the rest of his time to master the Breathing Fusion Technique and break through the limit of Sun Breathing.

However, as the experience gained in this world becomes slower and slower, Kamiya Seiichi estimates that it is unlikely that he will be able to make a major breakthrough.

But looking at his luxurious panel, Kamiya Seiichi's purpose of coming to this world has been exceeded.

No one can stop me with my long sword. I am invincible in this world!

He drew out the Sun Wheel Sword, the snow-white blade shone coldly, and with a light tap, the long sword made a crisp sound, as if reluctant to let go.

"Not yet, not yet. I can't bear to leave you, old friend."

Half a month later

Shinobu Kocho came to Seiichi Kamiya's yard with a resentful look, followed by Kanao.

In the yard, Seiichi Kamiya was chatting with Tanjiro.

Shinobu pushed the door open without any hesitation and stepped in under Kamiya Seiichi's astonished gaze.

"I've never seen Miss Shinobu act like this before. Tell me the truth, Tanjiro, what did you do?"

Seiichi Kamiya threw Tanjiro who was next to him over.

Tanjiro rubbed the back of his head with his hand, looking embarrassed. Kanao, who was behind Shinobu Kocho, was very calm.

“We don’t have many people in Butterfly House…”

"You also kidnapped my apprentice, Tanjirou-kun..."

Shinobu Kocho stretched out her hand, but Tanjiro showed no intention of dodging it despite his flushed face.

Instead of blaming Tanjiro as imagined, Shinobu Kocho stroked Tanjiro's hair and began to teach him some things, such as family matters. With her gentle eyes, both Tanjiro and Kanao had tears in their eyes.

“Master…”

Interrupting what Kanao was about to say, Shinobu Kocho held both of their hands and put them together.

"Tanjiro is a man worthy of trust. I feel at ease knowing you are following him, Kanao."

"After this matter is over, I will open a butterfly house in Kyoto City. Please come and visit us more often in the future."

Tears welled up in Kanao's eyes and she rushed forward to hug Shinobu Kocho.

that's nice!

Seiichi Kamiya, who was watching the show nearby, thought to himself.

"Oh, by the way, Inosuke is now a member of our Butterfly House."

Shinobu Kocho stuck out her tongue playfully and left, leaving the two people stunned. Kamiya Seiichi was stunned by the contrast and lost his mind for a moment.