The Concubine Seeks the World: Prince, Don't Be Too Spoiled!

The ace medic of the Special Forces has traveled back in time. He is capable of both medicine and poisoning. He can be funny or violent. The most important thing is that he shows no mercy when beating up scum. He pretends to be a pig and eats the tiger, slaps him in the face, and has a ruthless father, a poisonous mother, and a bitchy sister all in the palm of his hand, and tortures him ruthlessly!