The Poison Doctor Princess Is Wild

A legendary doctor of the modern age is chased into the mountains and struck on the head in a brawl, opening a door through time. She wakes in ancient times inside a new body, and is stunned to find a prince who looks exactly like her first love, who died saving her. To make up for that regret, she throws her whole heart into loving him. No matter how he torments her, she never backs down, repaying every cruelty with devotion!