Carl wrote to Curtis Levin for that.
It was already widely known within the empire that Carl had been cured of his illness with the help of Nero. But Curtis still had not been cured.
Of course, how could Curtis of Levin, a knightly family in the southern part of the empire, set foot on the land of Balturan to rescue that precious thing?
Nero was barely able to save him by using his authority as a prince and the power of Count Beria.
And Curtis didn't even know yet that his illness was the same as Carl's. Because the depth of the disease was so different, the symptoms also appeared differently, so they were known as different diseases.
As the next two years passed, Curtis would also notice that his condition was gradually worsening. So much so that the original Adrian could see Curtis and think of the dead Carl.
"But Curtis Levin doesn't seem to have a very good temper," Camilla advised in a cautious voice.