He picked up a seven-year-old child and raised him for eleven years.
It was originally intended as a test subject, but in the end he was tempted.
In order to keep him by his side, he was forcibly transformed.
But he failed.
From then on, the young man was imprisoned at eighteen and would not live to be nineteen.
Every year I die on the day before my birthday, and when I wake up the next day, I am still eighteen.
Concept: The more beautiful it is, the more dangerous it is