Synopsis：Five years ago, the female lead was drugged and encountered the King of the Underworld, who was resting by a swimming pool after being injured. After spending a night together, she unexpectedly absorbed his inner core. Without his inner core, the King of the Underworld went into seclusion to recover and spent five years healing. Five years later, he returned to the human world and located the female lead by her scent. By a twist of fate, the female lead—who was being pressured by her family to get married—mistook him for the man she had hastily married. Their cohabitation life began from that moment on.