The Delicate Illness Extraction Technique

"You did a splendid job! Young man, you use Thunder Breathing. You must be Suzuki Mufeng, the one Kuwajima sent a letter of recommendation for. You managed to defeat Lower Rank Six in such a short time, even though he was badly wounded. You're already a formidable swordsman. Are you sure you don't want to keep honing your Thunder Breathing and would rather train in Fire Breathing?"

"My current Breathing Style isn't right for me. I want to learn about more Breathing Styles and create one that suits me! That's the only way I can continue to improve. One day, I'll cut off the head of the Demon King, Muzan Kibutsuji!"

"Excellent! You've got a lot of spirit, young man! Once the people from Butterfly Mansion arrive in the village and treat everyone, we'll return to the Rengoku Family together. I'll teach you everything about Fire Breathing without holding anything back!"

As soon as Kyojuro Rengoku finished speaking, he hurried toward the village. Kamanue's Blood Demon Art, Corrosion, had created an ability that was still active, making the situation extremely dangerous. He had to get back and stand guard, making sure no other demons took advantage of the situation before the Flower Hashira and the others arrived.

Suzuki Mufeng pushed off with both legs, his whole body shooting forward like an arrow and following right behind Kyojuro Rengoku. No matter how much Kyojuro sped up, Suzuki Mufeng stayed close on his heels.

He must have worked hard to get that fast with Thunder Breathing. If he kept honing it, he'd surely become a Hashira who could stand on his own one day. A gifted young man like this—I had to guide him onto the right path!

The two soon reached the village. The sight before them was too horrible to bear. The plague had ravaged the villagers, leaving them barely recognizable. Their bodies were swollen with small bumps, and black spots dotted their skin like honeycomb. Anyone with trypophobia might have fainted at the sight.

This was the plague toxin Kamanue had developed from his Blood Demon Art, Corrosion.

A technique that had never appeared in the original story. Was this an upheaval caused by me, a transmigrator?

"Damn demon! You're dead, but you still won't let anyone rest in peace. Flame Hashira, when are the people from Butterfly Mansion going to get here?"

"Stay calm, young man. All we can do right now is wait here. We can't afford to make things worse."

Kyojuro Rengoku said this, but his arms were crossed tightly over his chest, his fingers clenched into fists—proof that he was far from calm inside.

Suzuki Mufeng had once been a teenager living in a peaceful era. He could face a demon and cut off its head without hesitation, but he couldn't turn a blind eye to the villagers writhing in agony from their illness. The sight overwhelmed him.

"It's different seeing this in person from seeing it on TV. My conscience is eating away at me. I have to do something."

Could Soft & Wet's bubbles strip the viruses from their bodies? Or wait—hadn't I gained memories from the Naruto world yesterday? Didn't he mention Medical Ninjutsu?

In the end, Suzuki Mufeng chose the safest option: the Delicate Illness Extraction Technique. He'd save Soft & Wet's abilities for experimenting on demons.

"Flame Hashira, I know an Onmyodo technique that might be able to treat these villagers. Please let me try. Whatever you see, don't be surprised."

"Suzuki, don't push yourself. The best we can do is stay here and wait for our companions from Butterfly Mansion."

Suzuki Mufeng passed Kyojuro Rengoku and walked straight toward the village behind him. Kyojuro didn't stop him, because he saw the blazing determination in Suzuki Mufeng's eyes.

Why not let him try? Maybe it really would work. A Hashira should trust his companions without reservation!

"Mom, my stomach hurts so much. I can't see anything. Am I going to die?"

"How could you, Ryota? You just ate something bad. You'll be fine once you get through this. That big brother over there has already called for a doctor. Promise me you won't fall asleep, Ryota. When the doctor gets here and you've taken your medicine, I'll buy you some candy. All right?"

The mother sat on the ground. The exposed skin on her wrists and chest was already covered in deep black spots. Her face was pale and bloodless, slick with cold sweat, but she gritted her teeth and held her child tight, hiding the weakness in her voice as she tried to encourage him.

"Mom, I'm so sleepy."

"Ryota, don't fall asleep. Pinch yourself—it'll help you stay awake. Ryota, please don't fall asleep. Don't leave Mom all alone."

Ryota's drooping eyelids were like the last straw, ready to break the mother at any moment. If her child died, her own strength would leave her too.

Anyone, please, save us!

"The child's condition is critical. Let him in. I can help."

Suzuki Mufeng used Soft & Wet's bubbles to create a space that was relatively isolated. Only then did he dare enter the village, already filled with the plague.

Suzuki Mufeng appeared like a ray of light. Without hesitation, the woman handed her child to the strange man standing inside the bubble. He was the last lifeline she could reach.

Ignoring the risk of infection, Suzuki Mufeng crouched down and carefully examined the child. Fortunately, Mufeng Uchiha had spent the several months in the Naruto world studying Medical Ninjutsu. He wasn't an expert, but he knew a thing or two.

"B-rank ninjutsu: Delicate Illness Extraction Technique. Hokage Mufeng has never used it before, so whether I succeed is all up to me."

Unable to use the Chakra Scalpel, Suzuki Mufeng had to make do with what he had on hand. Luckily, he always carried utensils, including a small knife. He first gave it a quick treatment with flame.

Even though he'd shared memories, Suzuki Mufeng had far less Chakra than Mufeng Uchiha. He had to carefully ration every step in preparation for what lay ahead.

He activated his Three-Tomoe Sharingan and sensed the source of the poison. It was in the arms. Yanu's technique spread through contact, and the places he'd touched were where the toxin was most concentrated.

He couldn't help marveling at how strange the Blood Demon Arts were. The Infinity Castle alone was already bizarre enough. How could Muzan Kibutsuji still lose? He'd taken a winning hand and played it terribly.

"Focus. Remove the infected tissue, draw out the toxin, and heal the damaged area. That's all. Mufeng, you can do this."

Taking a deep breath, Suzuki Mufeng began.

Throughout the procedure, the mother watched without daring to take a breath. Kyojuro Rengoku and the other villagers suffering from the illness watched intently too.

He extracted the toxin and healed the injured area, handling every step with the utmost care.

Time seemed to lose all meaning. At last, Suzuki Mufeng healed the wound he'd made.

"The child is out of danger, but the poison hasn't been completely cleared. We'll still have to wait for my companions to bring the Antidote. Please bear with us for now, ma'am. The child has only just recovered from the critical stage, so he can't be exposed to the infection again."

Suzuki Mufeng was about to carry Ryota outside. Fortunately, the boy's mother understood and didn't give him any trouble.

"Flame Hashira, I need a clean place to put the patients I've treated. Once our companions from Butterfly Mansion arrive, please have them check the patients. My treatment wasn't complete."

"Leave it to me! Go ahead and do your best, young man! Don't worry about them."

After handing the child to Kyojuro Rengoku, Suzuki Mufeng resolutely went back to continue treating the others.

"Ma'am, I'll treat you first. Then you can go look after Ryota."

"All right. Thank you. Truly—thank you..."

"Doctor, I'm next. Please treat me next."

"Doctor, please look at my father first."

Suzuki Mufeng didn't stop until his companions from Butterfly Mansion arrived. His Chakra and stamina had long since run out, and he'd kept going on sheer willpower. When he saw the Flower Hashira, Kanae Kocho, and the others from Butterfly Mansion take over, he finally passed out.