In debt to the richest man in Seoul(Mr.Hwang), Lee Vernor is forced to marry one of his sons to his son. but on the eve of his wedding, his eldest son Jisung runs away from the wedding with his boyfriend. Mr. Hwang threatened Mr. Lee with a gun and said that he had ruined his reputation. Seeing this incident, Mr. Lee's young son, Felix, who has just returned from studying in Australia, agrees to marry Mr. Hwang's son for his father's life. He had to do it for his father, even though he regretted agreeing to a man whom he had never seen or known in his life. So will Felix live happily ever after with that stranger (Hyunjin)? What threatens their lives? Will Hyunjin really fall in love with him later? Despite his young age, can Felix be the mistress of a family? Warning #crossdressing #mpreg #violance