Biochemical Research Institute and Medical Academy!

Just as the Demon Slayer World was in turmoil and about to usher in its first true world war, the humans and demons who chose to settle in the Sea Star World Demon Slayer World also experiencing their own lives.

The Drum Kingdom.

As always, snowflakes were falling and the cold wind was howling in this place, with continuous snow-capped mountains and thick snow accumulation.

Certainly.

The most spectacular sight is the eight Drum Peak, each reaching 5,000 meters in height.

However, compared to the past, the island seems to have become more lively. The small town that was originally at the foot of the mountain has now been expanded to the size of a city.

There are more buildings, the streets are wider, and people of all ages, dressed in thick winter clothes, come and go.

This place originally had no port, not even a decent dock. Even when the king needed to board or disembark a ship, he would simply set up a long plank on the shallows to the south.

But now there is a professional port that can accommodate dozens of ships of all sizes and a smooth road that runs through the town and leads directly to the main peak of the magnetic drum.

Hundreds of Lapahn Rabbit, resembling both polar bears and long-eared creatures, were seen wielding brooms and sweeping the snow off the road.

Interspersed among them were some young Lapahn, each holding a small broom, trying their best to help.

If a girl or child passing by is curious and comes over, they are not fierce; instead, they allow the other person to touch their ears or fur.

These Lapahn Rabbit were originally fearsome Kozuke.

However, during the months that Zephyr was receiving asthma treatment at the Medical Academy, they were pulled out every day by the trainees in the Training Camp to practice with them.

After completing their training, the rabbits would receive some meat as a reward. Over time, the Lapahn Rabbit got used to a life where they didn't hunt and relied entirely on humans for food.

It's just that I get beaten up once or twice a day.

Later, Zephyr's asthma was cured, and the Training Camp was naturally disbanded. It is said that they come here once a year. With the help of the Construction Division, these Lapahn Rabbit reached a cooperation agreement with the Drum Kingdom.

As long as they can ensure smooth traffic on this main road, the Drum Kingdom can provide meat.

If you get injured, there will be doctors to help treat you.

As for the foreign tourists who came by boat, they were basically there for the newly built World Hospital.

The Drum Kingdom was already renowned as a medical superpower on the Grand Line, and now with the endorsement of the World Government's Medical Academy, it has become the world's medical center.

Patients with intractable or serious illnesses that cannot be treated in their home country are sent here.

Key.

The performance of World Hospital and Medical Academy around the world these days has truly been astonishing.

Kureha, Crocus, and Naitin lead an elite team of doctors from the Drum Kingdom and from all over the Four Seas, and so far they have not encountered a case of treatment failure.

The recent addition of Tamayo and Shinobu Kocho Chinese Medicine, both from the Demon Slayer World, to the Medical Academy has greatly enhanced the influence of Chinese Medicine.

Oh, right.

Marco also holds a part-time position as a physician at the Medical Academy, but because he is also Air Force Vice Admiral, he usually doesn't come here.

She was more like a military medic who accompanied the troops in combat.

[Knock knock knock!]

In the dean's office on the top floor of the Medical Academy, after several knocks, Tanjiro Kamado walked in with his sister Nezuko.

Tanjiro has now been assigned to the Ministry of Police of Dragon, along with the 'Flame Hashira' Kyojuro Rengoku and others. However, because Nezuko needs to receive treatment here, she has not gone to the Sabaody Archipelago to report for duty.

"Miss Tamayo?"

Tanjiro saw the look of surprise on Tamayo as she sat on the sofa, which displeased Yushiro was standing behind the sofa.

"Huh?"

At that moment, Tanjiro's nose twitched, and he looked at Tamayo with surprise and suspicion.

Miss Tamayo's appearance was still as beautiful as ever, with her long black hair parted at her forehead and styled into a large, low bun.

Those pale purple eyes were so gentle, and her rosy lips, paired with her deep purple kimono, exuded the charm of an oriental beauty.

"Hey! That's enough! Take your filthy eyes off me!"

Yushiro couldn't hold back any longer. Ignoring the presence of Kureha Tanjiro, he scolded Nezuko, which made Nezuko, who was chewing on a small bamboo tube, glare at him angrily.

"Ah, no. No!"

Tanjiro quickly waved his hand and explained, "I just noticed that Ms. Tamayo and Mr. Yushiro's scents have changed; that faint Demon Aura is completely gone!"

Tamayo smiled and said, "As expected, you can't hide it from Tanjiro's nose. Yes, Yushiro and I are no longer demons."

After receiving a large amount of Muzan's blood from the World Government, she spent hundreds of years researching a formula that could turn demons back into humans. She finally completed it Four Heavens and volunteered to be among the first test subjects.

"What?"

Tanjiro was shocked, but immediately grabbed his sister's hand with great joy and exclaimed, "Then can Nezuko turn back into a human too?"

"Shut up, you brat from Otherworld!"

Suddenly, Kureha, who was sitting at the back of the office, threw her pen at Tanjiro's head and yelled, "Sit down and talk to me in peace!"

"Ah, yes, yes, I'm very sorry, Dean!"

Tanjiro, rubbing his aching head, wasn't angry. He sat down opposite Nezuko at the desk, a tense expression on his face.

"In short, that's the situation. Dr. Tamayo's 'Demon Slayer Medicine' can indeed turn demons back into humans, so you now need to make a decision."

"Don't hesitate any longer, please turn Nezuko back into a human immediately!" Tanjiro said urgently.

[Bang!]

Kureha slammed her hand on the table in annoyance, warning, "If you dare interrupt me again, I'll throw you out the back window!"

"Uh, I'm so sorry, please tell me!"

Tanjiro is now terrified of this Medical Academy dean; his temper is just too fiery, and he doesn't seem like a highly skilled doctor at all.

"I received feedback from the Biochemical Research Institute; they hope Nezuko can maintain her demonic form."

"As you know, Nezuko is the only demon who was born unaffected by Muzan Kibutsuji's bloodline and sunlight. She can function normally without drinking human blood, and her Blood Demon Art also has Purification Ability effect, making it extremely valuable."

"This value will bring her the attention of the Biochemical Research Institute and even the entire World Government, but they have also indicated that they will do everything they can to help her regain normal consciousness."

After listening to Kureha's words, Tanjiro stared into Nezuko's eyes in silence for a moment, then turned to look at her.

"Dean, if I refuse this suggestion, will you allow Nezuko to turn back into a human?"

Kureha's lips curled into a smile; she was starting to like this little brat.

"Of course, the Biochemical Research Institute has no jurisdiction over my Medical Academy. Their opinions are just that—opinions. If you've made up your mind, you can start treating your sister with Dr. Tamayo right now!"

Thirty minutes later.

The Biochemical Research Institute, located on the Level 5.5 of Impel Down's Impel Down, received a reply from the Medical Academy, a reply that made Dr. Fritz frown.

"Does this Kureha truly understand Nezuko's value?"

"Luckily, I still have two vials of blood that I got from CIPHER POL before, but I'll have to use them sparingly from now on, since we're all gone now, sigh--"

At that moment, Caesar walked into the office, accompanied by his peculiar laughter.

"Whoosh whoo..."

"Master, Muzan is begging us to give him some freedom, as long as he can move around within Impel Down. He's willing to obey all our orders."