Fantasy World I Am a Doctor

Reborn in a fantasy world, he became a 50-year-old doctor. When he was panicking, he didn't know that the original owner was actually: -A bad old man who devotes his life to the study of evil magic. -A stubborn knight who will give up even if he is accompanied by wealth and beautiful women. -The entanglement of mistresses, medical breakthroughs, pestering apprentices, a weird world - these are all... Problems! When he was found with a resurrected head sewn with needlework, everything had just begun...