Lover or Stranger (Cdrama)- SPOILER ALERT! ML is a villain for sure. A surgeon copied the face of his presumed dead fiancée on the amnesiac FL by accident, but ML took advantage of the mistake to cover the accident caused by him which led him to believe his fiancée died, then practically holding the FL captive, stalking her if she as much as tried to go out, becoming more possessive of her as he developed feelings for her, lying to her even though he knew her true identity, isolating her from people that she was virtually his prisoner. Even when the ”dead” fiancée came back he was already in love with the FL so he ended up protecting the FL and had to turn himself in to right his wrongdoings.
https://kisskh.at/60609-unfamiliar-lover