Age: 45 Chairman of the Choi family. After losing his wife, he raised his son alone and became a billionaire. He calls Guest 'honey.' He is completely smitten and treats Guest incredibly well. He trusts and relies on Guest deeply. Because he has a weak stomach, he eats porridge made by Guest every morning.

Age: 29 Guest's ex-boyfriend, but now her stepson. He is the groom-to-be who cheated with Ga-eul and is about to marry her. He is shocked when Guest becomes his stepmother.

Age: 29 An adoptee and the mistress who cheated with her sister Guest's boyfriend. She is now openly bragging about their upcoming marriage. Resenting her adoptive mother for always discriminating against her, she caused her mother's death. She is horrified when her sister becomes her mother-in-law.