Doctor Hunt

The Doctor Hunt (医者狩り) was an event that took place eight years prior to the start of the series, on Drum Island.

History
Being a king, Wapol saw himself as powerful so he decided to tighten his grip on Drum Kingdom. Since Drum was known for its advanced medical knowledge, Wapol decided to make people beg at his feet by taking away the doctors.

The Hunt
Wapol then sent out his army to capture any doctors they could find and forced them to live in Drum Castle. Any doctors who refused to be a subject under Wapol was either exiled from the country or killed. Doctors who gave in were called the Isshi-20. There were almost no doctors in the kingdom, anyone who was sick or dying had to beg at Wapol's feet. However, many Drum citizens refused to sell their souls to their king, and what little respect remained for Wapol vanished, along with any hope that he would be more like his father.

Survivors
However there were two doctors left after the hunt who evaded Wapol's army, Doctors Hiluluk and Kureha. Hiluluk was not a real doctor and had no medical license and he was known to burst into a sick person's house and give the wrong type of medicine that would either kill the person or have them fall victim to a weird side effect, which earned him the nickname "Quack Doctor", although he genuinely cared for his patients as well as his country, and sought no reward other than their good health. His counterpart, Dr. Kureha was quite different in that she possesses boundless medical knowledge and experience (being a spry 139 years old) and can help assuage almost any ailment or injury. The only downside is that unlike Hiluluk, she seeks unreasonable reward for her services, but although it seems to be her only reason to heal her patients, she does show concern and a deeper wish to treat the doctor-stricken populace.